PNW


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:MajorCustomers, us-gaap:ProductOrService
us-gaap:ProductOrService

us-gaap:Revenues
dei:LegalEntity

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization
dei:LegalEntity

us-gaap:CostOfGoodsAndServicesSoldDepreciationAndAmortization
dei:LegalEntity

us-gaap:CostsAndExpenses
dei:LegalEntity

us-gaap:OperatingIncomeLoss
dei:LegalEntity

us-gaap:InterestExpense
dei:LegalEntity

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
dei:LegalEntity

us-gaap:NonoperatingIncomeExpense
dei:LegalEntity

us-gaap:IncomeTaxExpenseBenefit
dei:LegalEntity

us-gaap:IncomeTaxesPaidNet
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTax
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
dei:LegalEntity

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
dei:LegalEntity
us-gaap:ConsolidatedEntities, dei:LegalEntity

us-gaap:Assets
dei:LegalEntity

us-gaap:LiabilitiesAndStockholdersEquity
dei:LegalEntity

us-gaap:StockholdersEquity
dei:LegalEntity

us-gaap:AssetsCurrent
dei:LegalEntity

us-gaap:CashAndCashEquivalentsAtCarryingValue
dei:LegalEntity

us-gaap:OtherAssetsCurrent
dei:LegalEntity

us-gaap:PropertyPlantAndEquipmentGross
dei:LegalEntity

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
dei:LegalEntity

us-gaap:PropertyPlantAndEquipmentNet
dei:LegalEntity

us-gaap:IntangibleAssetsNetExcludingGoodwill
dei:LegalEntity

us-gaap:OtherAssetsNoncurrent
dei:LegalEntity

us-gaap:LiabilitiesCurrent
dei:LegalEntity

us-gaap:AccountsPayableCurrent
dei:LegalEntity

us-gaap:TaxesPayableCurrent
dei:LegalEntity

us-gaap:OtherLiabilitiesCurrent
dei:LegalEntity

us-gaap:DividendsPayableCurrent
dei:LegalEntity

us-gaap:LongTermDebtNoncurrent
dei:LegalEntity

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
dei:LegalEntity

us-gaap:MinorityInterest
dei:LegalEntity
us-gaap:ConsolidatedEntities, dei:LegalEntity

us-gaap:OtherLiabilitiesNoncurrent
dei:LegalEntity

us-gaap:StockholdersEquity
dei:LegalEntity

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit
dei:LegalEntity

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:DepreciationDepletionAndAmortization
dei:LegalEntity

us-gaap:IncreaseDecreaseInInventories
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:ProceedsFromIssuanceOfLongTermDebt
dei:LegalEntity

us-gaap:RepaymentsOfLongTermDebt
dei:LegalEntity

us-gaap:RepaymentsOfLongTermDebt
dei:LegalEntity

us-gaap:ShareBasedCompensation

us-gaap:OperatingLeaseRightOfUseAsset
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, dei:LegalEntity
pnw:AmountofAdjustmentRepresentingProratedSalesLossesPendingApproval
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:CreditFacility, us-gaap:EnvironmentalRemediationContingency, us-gaap:JointlyOwnedUtilityPlant, dei:LegalEntity
pnw:AssetPurchaseAgreementAdditionalPercentageShareofCostofControl
us-gaap:EnvironmentalRemediationContingency, us-gaap:EnvironmentalRemediationSite, dei:LegalEntity
pnw:AssetPurchaseAgreementSiteContingencyIncreaseinLossExposureNotAccruedBestEstimate
us-gaap:EnvironmentalRemediationContingency, us-gaap:EnvironmentalRemediationSite, us-gaap:JointlyOwnedUtilityPlant, dei:LegalEntity
us-gaap:Range, us-gaap:EnvironmentalRemediationContingency, us-gaap:EnvironmentalRemediationSite, dei:LegalEntity

pnw:DeferredInvestmentTaxCredit
dei:LegalEntity
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
pnw:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeOnDiscontinuation

pnw:DividendsCommonStockNet
us-gaap:StatementEquityComponents
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity
pnw:ForwardComponentofPSARate1
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity
pnw:HistoricalComponentofPSARate1
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization
dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, dei:LegalEntity
pnw:IncreaseDecreaseinAmountofAdjustmentRepresentingProratedSalesLosses
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, pnw:PublicUtilitiesRegulatoryRegulatoryMatters, dei:LegalEntity
pnw:MaximumIncreaseDecreaseinPSARate1

pnw:MiscellaneousOtherNonoperatingExpense
dei:LegalEntity

pnw:MiscellaneousOtherNonoperatingIncome
dei:LegalEntity

pnw:NonoperatingCosts
dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity
pnw:PSARate1
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, pnw:PublicUtilitiesRegulatoryRegulatoryMatters, dei:LegalEntity
pnw:PSARateInPriorYears1
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, pnw:PublicUtilitiesRegulatoryRegulatoryMatters, dei:LegalEntity

pnw:PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds
dei:LegalEntity
us-gaap:EnvironmentalRemediationContingency, us-gaap:JointlyOwnedUtilityPlant, dei:LegalEntity
pnw:PercentageOfShareOfCostOfControl

pnw:ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds
dei:LegalEntity

pnw:ProceedsfromRepaymentsofShorttermDebtNet
dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity
pnw:RateMattersIncreaseDecreaseinCostRecovery
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:RegulatoryAsset
pnw:RegulatoryCostRecoveryIncomeDebtDeferralRefunded
us-gaap:RegulatoryAsset, dei:LegalEntity

pnw:RegulatoryCostRecoveryRevenue
us-gaap:ConsolidatedEntities, pnw:SaleLeasebackTransactionPeriod, dei:LegalEntity
pnw:SaleLeasebackTransactionNumberOfLeasesUnderWhichAssetsRetainedThroughSpecifiedPeriod

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForFundsUsedDuringConstructionInvestingActivities
dei:LegalEntity
us-gaap:PropertyPlantAndEquipmentByType, dei:LegalEntity
us-gaap:AssetRetirementObligationPeriodIncreaseDecrease
dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesGrossRealizedGains
us-gaap:InvestmentType, dei:LegalEntity
dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses
us-gaap:InvestmentType, dei:LegalEntity

us-gaap:CapitalExpendituresIncurredButNotYetPaid
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
dei:LegalEntity

us-gaap:DeferredIncomeTaxExpenseBenefit
dei:LegalEntity
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountVolume
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:GainLossOnSaleOfInvestments

us-gaap:IncomeTaxReconciliationDeductionsOther
us-gaap:IncomeTaxAuthority

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable
dei:LegalEntity

us-gaap:IncreaseDecreaseInAccountsPayable
dei:LegalEntity

us-gaap:IncreaseDecreaseInAccruedTaxesPayable
dei:LegalEntity

us-gaap:IncreaseDecreaseInContractWithCustomerAsset
dei:LegalEntity

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingAssets
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInPrepaidExpense
dei:LegalEntity

us-gaap:IncreaseDecreaseInRegulatoryClauseRevenue
dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

us-gaap:InterestCostsIncurred
dei:LegalEntity

us-gaap:InterestPaidNet
dei:LegalEntity

us-gaap:InvestmentIncomeInterest
dei:LegalEntity
us-gaap:LitigationCase
us-gaap:LitigationSettlementAmountAwardedFromOtherParty
us-gaap:LitigationCase, dei:LegalEntity
us-gaap:LitigationCase, us-gaap:SubsequentEventType
us-gaap:LitigationCase, us-gaap:SubsequentEventType, dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax
dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax
dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
dei:LegalEntity

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
dei:LegalEntity

us-gaap:OtherCostAndExpenseOperating
dei:LegalEntity

us-gaap:OtherNonoperatingExpense
dei:LegalEntity

us-gaap:OtherNonoperatingIncome
dei:LegalEntity

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
dei:LegalEntity

us-gaap:PaymentsOfDividendsCommonStock
dei:LegalEntity

us-gaap:PaymentsToAcquireProductiveAssets
dei:LegalEntity

us-gaap:PensionAndOtherPostretirementBenefitExpense
dei:LegalEntity
us-gaap:RetirementPlanType

us-gaap:ProceedsFromContributionInAidOfConstruction
dei:LegalEntity

us-gaap:ProceedsFromLinesOfCredit
dei:LegalEntity

us-gaap:ProceedsFromRepurchaseOfEquity
dei:LegalEntity
us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities
us-gaap:InvestmentType, dei:LegalEntity

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
dei:LegalEntity

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
dei:LegalEntity

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:RepaymentsOfLinesOfCredit
dei:LegalEntity

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
dei:LegalEntity
us-gaap:ConsolidatedEntities, pnw:SaleLeasebackTransactionPeriod, dei:LegalEntity
us-gaap:SaleLeasebackTransactionAnnualRentalPayments
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesTreasuryStockReissued

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued
us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:StockholdersEquityPeriodIncreaseDecrease
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:TaxesExcludingIncomeAndExciseTaxes
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations
dei:LegalEntity

us-gaap:WeightedAverageNumberOfSharesRestrictedStock

dei:EntityCommonStockSharesOutstanding

pnw:AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases

pnw:CoalReclamationandUnionTrust
dei:LegalEntity

pnw:CommonStockValueCommonAndTreasury

pnw:ConstructioninProgress
dei:LegalEntity

pnw:DecommissioningFundInvestmentsFairValueNetPendingSecuritiesSalesandPurchases
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, dei:LegalEntity
pnw:DecommissioningandOtherSpecialUseFundInvestmentsFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity

pnw:DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent
dei:LegalEntity
us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity
pnw:DeferredFuelandPurchasedPowerRegulatoryAssetLiabilityCurrent
us-gaap:DerivativeInstrumentRisk
pnw:DerivativeAssetLiabilityAmountNotOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk
pnw:DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk
pnw:DerivativeAssetLiabilityFairValueGrossAssetLiability
us-gaap:DerivativeInstrumentRisk
pnw:DerivativeAssetLiabilityFairValueGrossLiabilityAssetandObligationtoReturnandRighttoReclaimCashOffset
dei:LegalEntity
pnw:EquityAndLongTermDebtLessCurrentMaturitiesAndLeaseback

pnw:RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent
us-gaap:RegulatoryAsset
us-gaap:RegulatoryAsset, dei:LegalEntity
pnw:RegulatoryAssetNetBookValue

pnw:RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent
us-gaap:RegulatoryAgency, us-gaap:RegulatoryLiability
us-gaap:RegulatoryLiability
us-gaap:SubsequentEventType, dei:LegalEntity
pnw:RegulatoryMattersDemandSideManagementFunds

pnw:RegulatoryMattersLongtermDebtLimit
dei:LegalEntity

pnw:SpecialUseFundInvestmentsOtherGrossFairValue
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

pnw:SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases
us-gaap:FinancialInstrument

pnw:TotalDeferredDebits
dei:LegalEntity

pnw:TotalInvestmentsAndOtherAssets
dei:LegalEntity

us-gaap:AccountsReceivableGrossCurrent
dei:LegalEntity

us-gaap:AccumulatedDeferredInvestmentTaxCredit
dei:LegalEntity
dei:LegalEntity
us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
dei:LegalEntity
dei:LegalEntity
us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligationCurrent
dei:LegalEntity

us-gaap:AssetRetirementObligationsNoncurrent
dei:LegalEntity

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
dei:LegalEntity
us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedLossBeforeTax
dei:LegalEntity
us-gaap:AvailableForSaleSecurities
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:InvestmentType, dei:LegalEntity
dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:FinancialInstrument, dei:LegalEntity
us-gaap:AvailableForSaleSecuritiesEquitySecurities
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity

us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:CommercialPaper
us-gaap:CreditFacility, us-gaap:DebtInstrument, dei:LegalEntity

us-gaap:ContractWithCustomerAssetNetCurrent
dei:LegalEntity

us-gaap:ContractWithCustomerLiabilityCurrent
dei:LegalEntity

us-gaap:ContractWithCustomerLiabilityNoncurrent
dei:LegalEntity

us-gaap:DebtAndCapitalLeaseObligations
dei:LegalEntity
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity

us-gaap:DecommissioningTrustAssetsAmount

us-gaap:DeferredCreditsAndOtherLiabilities
dei:LegalEntity

us-gaap:DeferredIncomeTaxLiabilitiesNet
dei:LegalEntity

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
dei:LegalEntity

us-gaap:DerivativeAssetFairValueGrossLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset
us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement
us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeInstrumentsAndHedges
dei:LegalEntity

us-gaap:DerivativeInstrumentsAndHedgesLiabilities
dei:LegalEntity

us-gaap:DerivativeLiabilities
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilitiesNoncurrent
dei:LegalEntity

us-gaap:DerivativeLiabilityFairValueGrossAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset
us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement
us-gaap:DerivativeInstrumentRisk

us-gaap:EnergyRelatedInventoryOtherFossilFuel
dei:LegalEntity

us-gaap:IncomeTaxesReceivable
dei:LegalEntity

us-gaap:InterestPayableCurrent
dei:LegalEntity

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent
dei:LegalEntity
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility
us-gaap:LineOfCredit
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:CreditFacility, us-gaap:DebtInstrument, dei:LegalEntity

us-gaap:LongTermDebtFairValue
dei:LegalEntity
us-gaap:ConsolidatedEntities

us-gaap:NotesReceivableNet

us-gaap:NuclearFuelNetOfAmortization
dei:LegalEntity

us-gaap:OperatingLeaseLiabilityCurrent
dei:LegalEntity

us-gaap:OperatingLeaseLiabilityNoncurrent
dei:LegalEntity

us-gaap:OtherDeferredCostsNet
dei:LegalEntity

us-gaap:OtherInventorySupplies
dei:LegalEntity

us-gaap:OtherLongTermDebtCurrent
dei:LegalEntity

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet
dei:LegalEntity
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, dei:LegalEntity

us-gaap:RegulatoryAssetsCurrent
dei:LegalEntity

us-gaap:RegulatoryAssetsNoncurrent
dei:LegalEntity
us-gaap:RegulatoryAsset

us-gaap:RegulatoryLiabilityCurrent
dei:LegalEntity

us-gaap:RegulatoryLiabilityNoncurrent
dei:LegalEntity
us-gaap:RegulatoryAgency, us-gaap:RegulatoryLiability
us-gaap:RegulatoryLiability

us-gaap:ShortTermBorrowings
dei:LegalEntity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:TreasuryStockShares

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
dei:LegalEntity

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:CommonStockValue ████▇▇▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁2664265926542648264426342629262426202614260826042595259625522549254725412529252625232512250225002497249124892486248424662456245324502444244124382434242124182411NA2153NANA
us-gaap:CommonStockSharesIssued ███████▄▄▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁112112112112112112112111111111111111111111111111111111110110110110110110110110NANANA109NANANA109NANANA108NANANA101NANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock███████▄▄▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁112112112112112112112111111111111111111111111111111111110110110110110110110110NANANA109NANANA109NANANA108NANANA101NANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents us-gaap:TreasuryStock▇█▆▆▆▆▅▅▅▆▅▅▅▆▄▄▄█▆▆▆▇▅▅▅▁72302.0103546.057947.058219.063271.058135.017368.017633.029097.064463.09864.019298.029195.055317.01900.01900.07936.0115030.053559.053559.061784.078400.022293.023824.034828.0-98944.0NANANA-95192.0NANANA-111161.0NANANA-50410.0NANANA-93239.0NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 112NA112112112NA112112112NA112112112NA112112111NA111111111NA111111110NA111110110NA110110109NA109109108NA109107101NA101101
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 112NA112112112NA112112112NA111111111NA111111111NA111110110NA110110110NA110109109NA109109109NA109109108NA108107101NA101101
us-gaap:EarningsPerShareBasic ▂▃█▅▂▂█▅▂▂▇▅▂▃▇▄▂▂▇▄▂▂▇▄▂▂▆▄▂▂▇▄▁▂▇▃▁▂▇▄▂▁▆▃0.270.572.781.280.160.232.811.490.030.192.471.50.210.482.361.090.040.372.321.110.150.052.21.20.140.222.061.190.220.212.231.12-0.080.122.340.8-0.140.039999999999999592.151.07-0.06-0.28999999999999991.840.68
us-gaap:EarningsPerShareDiluted ▂▃█▅▂▂█▅▂▂▇▅▂▃▇▄▂▃▇▄▂▂▇▄▂▂▆▄▂▂▇▄▁▂▇▃▁▂▇▄▂▁▆▃0.270.572.771.280.160.232.81.480.030.192.461.490.210.472.351.080.040.372.31.10.140.052.21.190.140.222.041.180.220.22.211.11-0.080.112.320.79-0.140.049999999999999822.141.07-0.06-0.299999999999999931.840.68
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▂▇▄▂▂█▅▂▃▇▄▂▂▇▄▂▂▇▄▂▂▇▄▂▂▇▄▂▂▆▄▁▂▆▃▁▂▇▃▁▁▆▃66167011908697407561268974692759118394467773911669156777341199890671726117290668669911529156866931109878620667112479965968311398206206601089818
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers,us-gaap:ProductOrService pnw:RetailNonResidential,pnw:ElectricService▁▁▇▄▂▃█▆▂303315465395332353496435343NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers,us-gaap:ProductOrService pnw:RetailResidential,pnw:ElectricService▁▁█▃▂▂█▄▁325308668432351354695500316NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService pnw:ElectricandTransmissionService▁▁▇▃▂▂█▅▁64865911788587217471257954683NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ▁▂▇▄▂▂█▅▂▃▇▄▂▂▇▄▂▂▇▄▂▂▇▄▂▂▇▄▂▂▆▄▁▂▆▃▁▂▇▃▁▁▆▃66167011908697407561268974692759118394467773911669156777341199890671726117290668669911529156866931109878620667112479965968311398206206601089818
 us-gaap:Revenues dei:LegalEntity pnw:ArizonaPublicServiceCompany▁▁▇▃▂▂█▅▁▂▇▄▁661670119086974075612679716927571178943677NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization 188NANANA230NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization dei:LegalEntity pnw:ArizonaPublicServiceCompany188NANANA230NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServicesSoldDepreciationAndAmortization █▆▇▆▇▆▆▆▆▆▃▁154145149147148146145145144146133125NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSoldDepreciationAndAmortization dei:LegalEntity pnw:ArizonaPublicServiceCompany█▆▇▆▇▆▆▆▆▆▃▁154145149147148146145144144146133125NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▂▃▇▃▃▄█▅▃▃▄▂▁▁▄▃▂▂▆▃▁▃▅▂▁621658787672680689834731661669717640604616715683627624754658603666750652611NA736656599NA661624572NA689602622624735617562614721646
 us-gaap:CostsAndExpenses dei:LegalEntity pnw:ArizonaPublicServiceCompany▁▂▅▂▃▂▆▄▂▃▇▄▁▂▇▄▁▂█▄▁▂█▄▁618655784669675669814720654677856729611641858744627646897727609670884725615NA867731610NA811700566NA831653602NA839653546NANANA
us-gaap:OperatingIncomeLoss ▁▁▇▄▂▂▇▅▁▂█▆▂▃█▄▂▃█▄▂▂▇▅▂▂▇▅▂▂█▅▂▂█▄▁▂▇▄▂▂▆▃40114031966066433242319046630473122451231501094452316760421254758341525986101447254487843519637594032035746367171
 us-gaap:OperatingIncomeLoss dei:LegalEntity pnw:ArizonaPublicServiceCompany▁▁▇▄▂▂█▅▁▂▆▄▂▂▆▃▂▂▆▃▂▂▅▄▂▂▅▄▂▂▅▄▂▂▅▃▁▂▅▃▂431540620065864532513779322212659530716548863011626154287180697928418374772961765370292145456027714665NANANA
us-gaap:InterestExpense ██▇▆▇██▇▆▅▄▅▃▂▂▃▂▁▂▁▁▁▁▃▄55555352535555545250495047454647454445444444444749NA474745NA484953NA55565758545757575856
 us-gaap:InterestExpense dei:LegalEntity pnw:ArizonaPublicServiceCompany▇█▆▆▆██▇▆▆▄▅▃▂▃▄▂▂▃▁▁▁▁▄▄51525049505252514949474846444647444445434343434747NA464644NA474852NA535454NA505453NANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 14NA37016625NA4042156NA42526132NA40919111NA401194281438221531NA36621645NA399207-4NA384144-16NA351144NANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest dei:LegalEntity pnw:ArizonaPublicServiceCompany20NA37917334NA42822816NA43526236NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense █▇▆▆▆▇▇██▃▃▃▃▃▂▃▃▂▂▃▂▁▂▃▂292421221926262727787685763265-1595NA-143NA021NA4357604-146
 us-gaap:NonoperatingIncomeExpense dei:LegalEntity pnw:ArizonaPublicServiceCompany█▇▇▆▆▇███▁▄▃▃▄▄▄▃▂▃▃▂▃▃▃▂282423221926272828214981212138610106810106NA554NA642NA1442NA524NANANA
us-gaap:IncomeTaxExpenseBenefit ▃▁▅▄▄▄▆▅▄▄█▆▄▄█▆▄▄█▆▄▄█▆▄▄█▆▄▄█▆▄▄█▅▃▄▇▅▃▄▇▅-20-885317268444-12014488427141651221396775134746913177121814776-4713150-5-312351-7-110941
us-gaap:IncomeTaxesPaidNet ▁▂▂▄▂▄▂▄▂▂▂▂▂▃▂▂▂▂▂▂▂█-30110011010000207002300129NANA-131NANANA0NANANA0NANANA0-1-181-5-18-52NA
 us-gaap:IncomeTaxesPaidNet dei:LegalEntity pnw:ArizonaPublicServiceCompany▄▁▄▇▄█▄▆▄▃▄▄▄▅▄▄▅▅▅▄▄▇0-500350530240-1400016108950033NANA-134NANANANANANANA0NANANA0NANANA65NANANA
us-gaap:ProfitLoss ▂▂█▄▁▁█▅▁▁▇▅▁▂▇▄▁▂▇▄▁▁▆▄▁34683171492230319171826280172285826712694526112720924814124NA23413932NA2521300NA26293-9122391190-2519172
 us-gaap:ProfitLoss dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▂█▄▁▂█▅▁▁▇▄▁▂▇▄▁▂▆▃▁▁▆▄▁40723231553349343182143228917328632741321248266129241925514328NA24314234NA2551323NA25394-6NA2319416NANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██4444444444444444444444488NA888NA877NA775NA54NANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▂▂█▄▁▂█▅▁▁▇▅▁▂▇▄▁▂▇▄▁▁▆▄▁29633121441726315166321276167235326312144125712216524313215NANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents,dei:LegalEntity us-gaap:NoncontrollingInterest,pnw:ArizonaPublicServiceCompany▄▄▄▄▄▄▄▄▄▄4444444444NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents,dei:LegalEntity us-gaap:RetainedEarnings,pnw:ArizonaPublicServiceCompany▂▂█▄▁▂█▅▁▁35673181502844338177927NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▂▂█▄▁▂█▅▁▁▇▅▂▂▇▄▁▂▇▄▁▁▇▄▁31533131431933316162418277166245126412156025812317025513318NA24113430NA275139-23NA27693-4NANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▂█▄▁▂█▄▁▁▇▄▁▂▇▄▁▂▆▃▁▁▆▄▁3658319148295133917310242851682457270127860262126211025713522NA25013732NA278142-19NA26794-1NANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▂▂█▄▁▂█▅▁▁▇▅▂▂▇▄▁▂▇▄▁▁▇▄▂365831814723383211679232821712956269126106526312822325914227NA24914338NA283147-16NA2831000NA234128NANANANA
 us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▂█▄▁▂█▄▁▁▇▄▁▂▇▄▁▂▆▃▁▁▆▄▁41633241533455344178152929017329622751321365267130261426114431NA25814540NA286149-12NA2741013NA227104NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▃█▄▂▂█▅▁▂▇▅▂▂▇▄▁▂▇▄▂▁▆▄▂▂▆▄▂▂▆▄▁▂▇▃▁29633121441726315166321276167235326312144125712216524313215242261312422244122-81225586-15NA233NANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▃█▄▂▂█▅▁▂▇▅▂▂▇▄▁▂▆▄▂▂▆▄▂▂▆▄▂▂▆▄▁▂▆▃▁▁▆▃▁356731815028443381779272841692358269127743261125191525113419302341332626247124-41424687-1272269010NANANA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██4444444444444444444444488NA888NA877NA7755545544
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest dei:LegalEntity pnw:ArizonaPublicServiceCompany▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██4444444444444444444444488NA888NA877NA775NA545NANANA
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities,dei:LegalEntity us-gaap:VariableInterestEntityPrimaryBeneficiary,pnw:ArizonaPublicServiceCompany5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:Assets ████▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▃▃▂▂▂▂▂▂▂▁▁▁▁▁18561184791837718165178541766417671174921714817019169771666916192160041580515538151851502814875147011443514313139801369013450135081382213562133001337913460132141318313111131501247412302123621243512158NA11986NANA
 us-gaap:Assets dei:LegalEntity pnw:ArizonaPublicServiceCompany████▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▁▁▁1845418370182921807417756175651754917337170081689316851165461608715931156781548015134149821483814640143411421513936135801335913381136751348413230132421335013146130981303213074123741219612271NANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▃▃▂▂▂▂▂▂▂▁▁▁▁▁18561184791837718165178541766417671174921714817019169771666916192160041580515538151851502814875147011443514313139801369013450135081382213562133001337913460132141318313111131501247412302123621243512158NA11986NANA
 us-gaap:LiabilitiesAndStockholdersEquity dei:LegalEntity pnw:ArizonaPublicServiceCompany████▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▁▁▁1845418370182921807417756175651754917337170081689316851165461608715931156781548015134149821483814640143411421513936135801335913381136751348413230132421335013146130981303213074123741219612271NANANANANANA
us-gaap:StockholdersEquity ███▇▇▇▇▆▆▆▇▆▆▅▆▅▅▅▅▄▄▄▄▄▄▃▄▃▃▃▃▂▂▂▂▁▂▂▂▁5469543055525233525152225353503250195006514248594828480348534585459945834653439243964367449142334222419442754032401439724056377837443821389436133631368337163479NA3316NANA
 us-gaap:StockholdersEquity dei:LegalEntity pnw:ArizonaPublicServiceCompany███▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▄▃▃▃▃▂▂▂▂▁▁▂▂▁▁▁59125876599356735690566156255285526752565237495249294905494646754687467947574494449944784599434243314308439241424125409341813902386539434013374637663824NANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:AssetsCurrent ▃▃▄▃▂▂▅▄▂▃▄▃▁▁▃▂▁▂▃▃▂▃▃▃▂▃▆▃▂▃▄▂▂▂█▃▂▂▅▄107810301133102887692412071118957101611741068794822977963826890106110319359731040999897104313501066871100510989479049561591103695893112431086NA928NANA
 us-gaap:AssetsCurrent dei:LegalEntity pnw:ArizonaPublicServiceCompany▃▃▄▃▁▂▄▄▂▃▄▃▁▁▂▂▁▂▃▃▂▂▃▂▁▂▅▃▁▂▃▂▂▂█▃▂▃103198111019958438931166109393499511581048789837930947809870105099486390010289178339441231102183490010239168579151554976891953NANANANANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▂▁▁▁▁▁▂▁▁▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁▂▁▃▁▁▁▂▁▁▁█▂▂▂▃▂▁▃▂▁6310291656431513104384843143913131171091039135272526791120335649211411019550314510017
 us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▂▁▁▁▂▁▁▁█▂▂▂▃▁▁▃53102916564314131042883142257645910331135735322195558510499162351120NANA
us-gaap:OtherAssetsCurrent █▅▆▇▆▅▅▃▄▄▃▃▄▃▃▃▃▂▂▃▃▂▃▄▃▃▂▃▃▂▁▂▂▁▁▂▂▁▃▃82616772655660455148454548454342403738444538404845393642393728333226293031284344NA30NANA
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  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:PropertyPlantAndEquipmentGross ████▇▇▇▆▆▆▅▅▆▅▅▅▄▄▄▄▄▄▃▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁19930198361967719630187631873618443183281789617798173101722717436173411687716663162851622215997159261555115543152511544815256152001459714503144941434614116140481392813753134231335113270132011298712932NA12848NANA
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us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁6784663765526470639863666328624562316128603759516060597058955733567055945537549754525397530853885360530051015022499749294901484347754709468446754580451444594400NA4340NANA
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us-gaap:PropertyPlantAndEquipmentNet ████▇▇▆▆▆▆▅▅▅▅▅▅▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁131461319813125131591236412370121151208211664116691127211275113761137110981109301061510628104591042910098101459942100599896990094969481949794169214920591529043873886768690868785278531NA8507NANA
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us-gaap:OtherAssetsNoncurrent ▆▆▆▆▆▇▇▂▂▅▅▃▃▃▃▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂██▇97961029799103106595884887170696854525252515154606160606064646262646464636364116112109NA110NANA
 us-gaap:OtherAssetsNoncurrent dei:LegalEntity pnw:ArizonaPublicServiceCompany▄▃▅▄▃▃▃▃▃▇▇▄▄▄▄▂▂▂▂▂▂▂▂▂▂▂▂▁▂▁▁▁▁▁▁▁▁█4443554642404040416766494948483434343433333333343433333132313131313029292971NANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:LiabilitiesCurrent █▇▄▆▄▅▅█▆▃▃▅▃▃▂▄▄▄▄▃▃▄▄▄▄▅▄▄▁▂▁▂▂▃▅▆▅▃▁▃2295207815861900159116481734223818741197130316381193129211091478158514421523133913731559144815541394161814461537891108394911041157134217831831167413109671227NA1108NANA
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us-gaap:DividendsPayableCurrent ▁█▁█▁█▁▇▁▇▁▇▁▇▁▇▁▇▁▆▁▆▁▆087082082077077073072069069065065062NA62NA59NA59NA57NANANA57NANANA56NA0NANA
 us-gaap:DividendsPayableCurrent dei:LegalEntity pnw:ArizonaPublicServiceCompany▁█▁█▁█▁▇▁▇▁▇▁▇▁▆▁▆▁▆▁▆▁▆088082082077077073072069069065065062NA62NA59NA59NA57NANANA57NANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:LongTermDebtNoncurrent █████▇▆▆▆▇▆▆▆▅▅▅▃▃▃▄▃▂▂▂▂▁▁▁▃▂▃▃▃▂▂▁▁▂▃▃4833483249844886488646384487419142904789449141924273402141453897346334623257356532813031303729993045279628202820330431993338337133413019304627612845304534633326NA3496NANA
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us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▁▁▁▂▂▂▂▂▁▂▂▃▃▃▂▂▂▃▂▂▂▂▁▂▂▃▆▆▆▇████▅▅▅▅▄▄2732802973563844433163192843274094604695094014404414803834254124532334394425139391013103410581206124312771268877869824813737728NA811NANA
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 us-gaap:MinorityInterest dei:LegalEntity pnw:ArizonaPublicServiceCompany▅▄▅▅▅▅▅▅▆▅▆▅▆▅▆▆▆▆▆▅█▇█▇█▇▇▆▆▅▅▄▄▃▃▂▂▁1271221291241301251321271331291351301371321381331401351371321561511521471541451451371371291291211161081081019691NANANANANANA
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us-gaap:OtherLiabilitiesNoncurrent ▂▂▃▂▂▂▂▃▂▂▂▃▂▂▃▄▄▃▃▄▃▃▃▄▃▃▃▃█▇▆▄▅▄▃▂▂▁▁▁163159166144149147161168155148158168162156190198194186184196191188177196184185178191307283248209219217170142144132127130NA144NANA
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  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
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  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▁▇▂▂▄█▃▂▅▇▁▁▃▄▃▁▃▆▃▁▂183121488172173317563228166346481150140258342278144272427250144212NANA249NANANA212NANANA115NANANA243180368215-13296568NA
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  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▁▇▂▂▄█▃▂▅▇▁▁▃▄▃▁▃▆▃▁▂183121488172173317563228166346481150140258342278144272427250144212NANA249NANANA212NANANA115NANANA243180368215-13296568NA
 us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▁▇▁▂▃█▂▁▄▆▁▁▃▄▃▁▃▅▃▁▂193177495146188266582228177356479152173243339272153268426252152221NANA273NANANA228NANANA114NANANA254NANANA-64NANANA
us-gaap:ProfitLoss ▂▂█▄▁▁█▅▁▁▇▅▁▂▇▄▁▂▇▄▁▁▆▄▁34683171492230319171826280172285826712694526112720924814124NA23413932NA2521300NA26293-9122391190-2519172
 us-gaap:ProfitLoss dei:LegalEntity pnw:ArizonaPublicServiceCompany▂▂█▄▁▂█▅▁▁▇▄▁▂▇▄▁▂▆▃▁▁▆▄▁40723231553349343182143228917328632741321248266129241925514328NA24314234NA2551323NA25394-6NA2319416NANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██4444444444444444444444488NA888NA877NA775NA54NANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▂▂█▄▁▂█▅▁▁▇▅▁▂▇▄▁▂▇▄▁▁▆▄▁29633121441726315166321276167235326312144125712216524313215NANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents,dei:LegalEntity us-gaap:NoncontrollingInterest,pnw:ArizonaPublicServiceCompany▄▄▄▄▄▄▄▄▄▄4444444444NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents,dei:LegalEntity us-gaap:RetainedEarnings,pnw:ArizonaPublicServiceCompany▂▂█▄▁▂█▅▁▁35673181502844338177927NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization █▇▇▇▇▆▇▆▇▇▅▄▄▄▃▃▃▄▄▃▃▁173163168164167161164161163164154143147142140141140143145140141124NANA122NANANA124NANANA118NANANA123122120115114112115NA
 us-gaap:DepreciationDepletionAndAmortization dei:LegalEntity pnw:ArizonaPublicServiceCompany█▇▇▇▇▆▇▆▆▇▅▄▄▃▃▃▃▄▄▃▃▁173163168164167161164161162164153143147141140141140143145140141124NANA122NANANA124NANANA118NANANA123NANANA113NANANA
us-gaap:IncreaseDecreaseInInventories ▂█▃▄▅▁▃▄▅▄▃▄▃▃▄▃▃▃▄▄▄▂-533-2813-14-26164-340-250-11489-7NANA0NANANA9NANANA13NANANA-216-5-7-6-4-4NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▅▅▆▇▆█▄▂▁▃▃▃█▅▃▂▅▇▆█▅-341-298-304-273-254-279-234-318-361-388-351-339-348-241-295-343-372-293-263-276-232-288NANA-208NANANA-176NANANA-235NANANA-192-198-99-67-210-1684NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities █▇▃▆▆▄▁▆█▆▃██▄▄▆█▆▃▅▆▆210157-1569681-97-2687719546-124190202-56-429320346-164289273NANA53NANANA-36NANANA106NANANA-46-68-123-10082-83-490NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity pnw:ArizonaPublicServiceCompany█▇▃▇▆▅▁▆█▆▃██▅▄▆█▆▃▆▆▆19294-15912572-44-2827317729-129180163-6-799019238-166248165NANA34NANANA-47NANANA102NANANA-57NANANA152NANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁▅▅▁█▃▅▁▁▅▅▁▅▁▄▇▁▄▁▆▅▃0297297049715029500298297-3255024744502420350250157NANA250NANANA104NANANA319NANANA1750000026NA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt dei:LegalEntity pnw:ArizonaPublicServiceCompany▁▅▅▁█▁▅▁▁▁▅▁▅▁▄▇▁▄▁▆▅▁029729704970295000297-325502474450242035025032NANA250NANANA104NANANA319NANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▃▂▁▁█▂▁▂▁▃▁1501000050010008201250NANA16276NANA700NANA148NANANANANANANANANANA375NANANA175226911435218NA
 us-gaap:RepaymentsOfLongTermDebt dei:LegalEntity pnw:ArizonaPublicServiceCompany▃▂▁▁█▂▁▂▁▁▁15010000500100082000NANA16276NANA700NANA23NANANANANANANANANANA375NANANA0NANANA0NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:RepaymentsOfLongTermDebt ▃▂▁▁█▂▁▂▁▃▁1501000050010008201250NANA16276NANA700NANA148NANANANANANANANANANA375NANANA175226911435218NA
 us-gaap:RepaymentsOfLongTermDebt dei:LegalEntity pnw:ArizonaPublicServiceCompany▃▂▁▁█▂▁▂▁▁▁15010000500100082000NANA16276NANA700NANA23NANANANANANANANANANA375NANANA0NANANA0NANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value26642659265426482644263426292624262026142608260425952596255225492547254125292526252325122502250024972491248924862484246624562453245024442441243824342421241824112153
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.414.414.414.614.814.914.915.015.315.415.415.616.016.216.216.416.816.917.017.217.517.617.918.318.618.418.018.318.718.418.218.618.618.618.619.519.819.619.419.818.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value112112112112112112112111111111111111111111111111111111110110110110110110110110109109108101
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value112112112112112112112111111111111111111111111111111111110110110110110110110110109109108101100
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value72302.0103546.057947.058219.063271.058135.017368.017633.029097.064463.09864.019298.029195.055317.01900.01900.07936.0115030.053559.053559.061784.078400.022293.023824.034828.0-98944.0-95192.0-111161.0-50410.0-93239.0-59827.0
Percentage of CommonStockSharesIssued0.10.10.10.10.10.10.00.00.00.10.00.00.00.00.00.00.00.10.00.00.10.10.00.00.0-0.1-0.1-0.1-0.0-0.10.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value112112112112112112112112112112112112111111111111111111110111110110110110109109109108109107101101101
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value112112112112112112112111111111111111111111110110110110110110109109109109109109109108108107101101101
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value0.270.572.781.280.160.232.811.490.030.192.471.50.210.482.361.090.040.372.321.110.150.052.21.20.140.222.061.190.220.212.231.12-0.080.122.340.8-0.140.039999999999999592.151.07-0.06-0.28999999999999991.840.68
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value0.270.572.771.280.160.232.81.480.030.192.461.490.210.472.351.080.040.372.31.10.140.052.21.190.140.222.041.180.220.22.211.11-0.080.112.320.79-0.140.049999999999999822.141.07-0.06-0.299999999999999931.840.68
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value66167011908697407561268974692759118394467773911669156777341199890671726117290668669911529156866931109878620667112479965968311398206206601089818
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MajorCustomers, us-gaap:ProductOrService

pnw:RetailNonResidential, pnw:ElectricService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value303315465395332353496435343
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.847.039.145.544.946.739.244.749.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.847.039.145.544.946.739.244.749.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:RetailNonResidential pnw:ElectricService100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:RetailResidential, pnw:ElectricService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value325308668432351354695500316
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax49.146.056.149.747.546.954.851.445.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax49.146.056.149.747.546.954.851.445.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:RetailResidential pnw:ElectricService100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:Wholesale, pnw:ElectricService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value142636213628531512
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.24.03.12.54.93.74.21.61.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.24.03.12.54.93.74.21.61.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:Wholesale pnw:ElectricService100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

pnw:ElectricandTransmissionService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value64865911788587217471257954683
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax97.998.398.998.797.498.899.197.998.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax97.998.398.998.797.498.899.197.998.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ElectricandTransmissionService100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:OtherServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value234345675
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.60.30.40.60.80.50.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.60.30.40.60.80.50.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:OtherServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:TransmissionServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value151615151514151514
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.41.31.72.11.91.31.62.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.41.31.72.11.91.31.62.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:TransmissionServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value66167011908697407561268974692759118394467773911669156777341199890671726117290668669911529156866931109878620667112479965968311398206206601089818
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value661670119086974075612679716927571178943677
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.099.899.999.899.699.9100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.099.899.999.899.699.9100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Sales Revenue Net

Cost Of Goods And Services Sold

Cost Of Goods And Service Excluding Depreciation Depletion And Amortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization



Period End2020-03-312019-03-31
Value188230
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.531.1

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value188230
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.531.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.0

Cost Of Goods And Services Sold Depreciation And Amortization

us-gaap:CostOfGoodsAndServicesSoldDepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value154145149147148146145145144146133125
Percentage of CostOfGoodsAndServicesSoldDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.321.712.616.920.119.311.514.920.919.311.313.3

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value154145149147148146145144144146133125
Percentage of CostOfGoodsAndServicesSoldDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.099.499.599.799.799.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.321.712.516.920.119.311.514.820.819.311.313.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value621658787672680689834731661669717640604616715683627624754658603666750652611736656599661624572689602622624735617562614721646
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax93.998.266.177.491.991.265.875.195.588.160.667.889.283.461.374.792.685.062.974.089.991.764.072.089.063.971.687.359.671.092.361.375.494.491.364.675.290.792.966.379.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value618655784669675669814720654677856729611641858744627646897727609670884725615867731610811700566831653602839653546
Percentage of CostsAndExpenses99.599.599.699.599.297.197.698.498.9101.2119.4114.0101.2104.0120.0108.8100.1103.6119.0110.4101.0100.7117.8111.2100.8117.7111.5101.9122.7112.398.9120.5108.496.8114.1105.897.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax93.497.765.977.091.288.564.274.094.489.272.377.390.286.773.681.392.788.174.881.690.892.375.480.089.775.379.989.073.279.891.273.981.791.373.779.688.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value40114031966066433242319046630473122451231501094452316760421254758341525986101447254487843519637594032035746367171
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.11.833.922.68.18.834.224.94.511.939.432.210.816.638.725.37.415.037.126.010.18.336.028.011.012.036.128.412.714.640.429.07.711.838.724.65.68.735.424.89.37.133.721.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value431540620065864532513779322212659530716548863011626154287180697928418374772961765370292145456027714665
Percentage of OperatingIncomeLoss107.6126.1100.8101.7108.8129.7104.7103.9120.987.569.169.989.178.068.271.597.578.967.770.190.691.168.371.092.694.268.470.786.176.866.369.5112.589.767.373.8122.7101.768.671.9113.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.62.334.123.08.811.535.825.85.510.427.222.59.713.026.418.17.211.825.118.39.17.524.619.910.111.324.720.110.911.226.820.18.710.626.018.26.98.824.317.810.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5555535253555554525049504745464745444544444444474947474548495355565758545757575856
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.38.34.56.17.37.44.45.67.56.74.25.37.06.24.05.26.76.13.84.96.66.13.85.37.24.15.26.64.45.68.74.97.08.78.54.87.09.38.85.46.9

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value51525049505252514949474846444647444445434343434747464644474852535454505453
Percentage of InterestExpense93.793.693.292.792.694.294.594.594.697.696.297.197.798.098.598.998.998.698.698.498.598.498.398.896.698.398.398.297.997.697.996.997.095.093.793.993.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.87.84.25.66.87.04.25.37.16.54.05.16.86.14.05.16.66.03.84.96.56.03.75.26.94.05.16.54.35.58.54.76.88.34.56.68.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Long Term Debt

Other Nonoperating Income Expense

Income Loss From Continuing Operations

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value14370166254042156425261324091911140119428143822153136621645399207-4384144-16351144
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.231.119.13.431.922.11.035.927.74.835.121.01.733.521.94.32.032.623.84.531.823.76.636.123.6-0.734.218.0-2.530.917.6

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value20379173344282281643526236
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest141.7102.6104.5137.3106.1105.9242.8102.4100.5113.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.131.920.04.733.823.52.436.827.85.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value292421221926262727787685763265-1595-1430214357604-146
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.61.82.62.63.52.12.94.01.00.70.80.91.10.40.81.00.50.20.80.8-0.20.41.10.7-0.10.50.60.00.30.20.40.40.81.00.50.10.8-0.20.40.8

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2824232219262728282149812121386101068101065546421442524
Percentage of NonoperatingIncomeExpense98.4100.8112.5100.5100.699.6104.7101.5101.537.9168.1137.7141.5149.0251.7173.6124.2165.0445.6153.2128.7-585.6204.6110.6124.1-339.9121.5109.61467.8157.7162.2301.5123.645.394.5372.591.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.62.02.62.63.52.22.94.10.41.31.01.31.71.11.51.20.80.81.21.01.20.91.20.90.50.60.60.60.50.41.30.50.40.50.40.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-20-885317268444-12014488427141651221396775134746913177121814776-4713150-5-312351-7-110941
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.1-13.24.52.00.30.96.74.5-0.22.712.29.40.63.712.17.20.33.111.67.61.20.711.58.20.91.311.48.41.82.613.38.7-0.71.111.76.4-0.9-0.610.86.3-1.2-0.210.15.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-19-8556181118545225146888
Percentage of IncomeTaxExpenseBenefit96.296.7105.4108.160.1167.8101.4103.9-166.5122.6101.599.5205.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.9-12.84.72.10.21.56.74.70.33.412.49.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-30110011010000207002300129-131000-1-181-5-18-52
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.50.00.11.20.01.50.01.00.00.00.00.2-0.01.00.00.00.40.50.10.00.34.0-19.10.1-0.10.0-0.2-1.60.2-0.9-2.7-4.8

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312012-03-312011-03-312010-03-31
Value0-500350530240-1400016108950033-1340065
Percentage of IncomeTaxesPaidNet-0.0-107691.50.0329.80.0480.096.6246.10.0-1423000.0106.50.0-0.0220.92984.70.0350.6241.8620.00.010.0115.1102.5-0.00.0-1180.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-7.60.04.10.07.00.02.50.0-1.90.00.00.02.20.20.01.31.30.40.00.04.6-19.60.00.010.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value3468317149223031917182628017228582671269452611272092481412423413932252130026293-9122391190-2519172
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.310.326.617.13.14.125.217.61.23.523.718.24.27.923.013.81.46.321.814.33.11.321.215.63.620.415.24.822.814.8-0.123.411.7-1.51.821.014.6-0.1-3.817.58.9

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4072323155334934318214322891732863274132124826612924192551432824314234255132325394-62319416
Percentage of ProfitLoss115.4105.8102.1104.0145.4159.5107.3106.5178.8123.2102.9101.099.5109.0102.3104.7130.0106.0101.6101.9118.1208.3102.9101.7115.2103.7102.0104.9101.2102.0-761.396.6101.168.397.079.5-1796.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.110.927.217.84.56.527.118.82.14.324.418.44.18.623.514.41.86.622.214.63.62.721.815.94.121.115.55.023.115.10.622.611.9-1.020.311.62.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value444444444444444444444448888887777554
Percentage of ProfitLoss14.07.11.53.321.415.71.52.860.218.41.72.817.38.41.83.952.310.61.93.622.243.31.76.336.13.66.025.63.26.0-1616.62.87.6-56.52.14.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.40.60.70.60.40.50.70.60.40.50.70.70.40.50.70.70.40.50.70.60.41.01.30.70.91.20.70.91.30.70.90.80.40.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value29633121441726315166321276167235326312144125712216524313215
Percentage of ProfitLoss86.092.998.596.778.684.398.597.239.881.698.397.282.791.698.296.147.789.498.196.477.856.798.393.763.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.59.526.216.62.43.424.817.10.52.823.317.73.47.222.513.30.75.621.413.82.40.720.814.62.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4444444444
Percentage of ProfitLoss14.07.11.53.321.415.71.52.860.218.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.40.60.70.60.40.50.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value35673181502844338177927
Percentage of ProfitLoss101.498.7100.5100.8124.1143.7105.8103.6118.6104.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.310.126.817.33.85.926.718.31.43.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value3153313143193331616241827716624512641215602581231702551331824113430275139-2327693-4
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.88.026.316.42.64.425.016.70.62.523.517.63.67.022.713.30.88.221.613.92.7-0.021.814.72.820.914.74.424.815.9-3.824.611.7-0.7

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value365831914829513391731024285168245727012786026212621102571352225013732278142-1926794-1
Percentage of ComprehensiveIncomeNetOfTax116.4109.9102.1104.1153.5152.9107.3106.8242.9130.3102.9101.099.7111.3102.3104.9153.0100.7101.6102.0121.5-3105.8100.7101.9120.4103.6102.1105.0101.0101.683.296.7101.236.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.58.826.917.14.06.826.817.81.63.224.117.83.67.823.213.91.28.321.914.23.21.422.015.03.321.715.04.725.116.2-3.223.811.8-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value36583181472338321167923282171295626912610652631282232591422724914338283147-162831000234128
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.58.726.717.03.25.125.317.21.33.123.918.24.37.623.113.81.58.922.014.43.40.522.215.74.121.715.65.725.616.8-2.625.212.60.120.615.7

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value4163324153345534417815292901732962275132136526713026142611443125814540286149-122741013227104
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest114.2109.1102.0104.0142.6146.2107.2106.6168.1124.0102.9101.099.8110.4102.3104.7128.0100.7101.5102.0117.1377.8100.7101.7113.9103.5102.0103.9101.0101.575.196.8101.1485.496.980.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.39.527.317.74.67.427.218.32.33.924.618.34.38.423.614.41.98.922.314.73.92.022.316.04.622.415.95.925.817.1-1.924.412.70.620.012.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-30
Value29633121441726315166321276167235326312144125712216524313215242261312422244122-81225586-15233
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.59.526.216.62.43.424.817.10.52.823.317.73.47.222.513.30.75.621.413.82.40.720.814.62.33.519.614.33.63.322.113.9-1.31.922.710.8-2.320.5

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value356731815028443381779272841692358269127743261125191525113419302341332626247124-41424687-1272269010
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic117.8106.2102.1104.2157.8170.6107.4106.6298.0128.5103.0101.099.4109.8102.4104.8162.9106.7101.6102.0123.2290.9102.9101.9123.8123.8103.9102.1106.5118.6101.2102.149.7113.896.5101.279.80.096.90.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.310.126.817.33.85.926.718.31.43.724.017.93.47.923.113.91.16.021.814.13.02.221.414.92.84.320.414.63.83.922.314.2-0.72.121.911.0-1.81.119.911.01.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value44444444444444444444444888888777755545544
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.40.60.70.60.40.50.70.60.40.50.70.70.40.50.70.70.40.50.70.60.41.01.30.70.91.20.70.91.30.70.90.80.80.40.60.80.80.40.5

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4444444444444444444444488888877775545
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.1100.4100.2100.2100.2100.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.40.60.70.60.40.50.70.60.40.50.70.70.40.50.70.70.40.50.70.60.41.01.30.70.91.20.70.91.30.70.90.80.50.60.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidatedEntities, dei:LegalEntity

us-gaap:VariableInterestEntityPrimaryBeneficiary, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value5
Percentage of NetIncomeLossAttributableToNoncontrollingInterest102.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary pnw:ArizonaPublicServiceCompany0.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1856118479183771816517854176641767117492171481701916977166691619216004158051553815185150281487514701144351431313980136901345013508138221356213300133791346013214131831311113150124741230212362124351215811986
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1845418370182921807417756175651754917337170081689316851165461608715931156781548015134149821483814640143411421513936135801335913381136751348413230132421335013146130981303213074123741219612271
Percentage of Assets99.499.499.599.599.599.499.399.199.299.399.399.399.499.599.299.699.799.799.899.699.399.399.799.299.399.198.999.499.599.099.299.599.499.499.499.299.199.3
Percentage of Assets99.499.499.599.599.599.499.399.199.299.399.399.399.499.599.299.699.799.799.899.699.399.399.799.299.399.198.999.499.599.099.299.599.499.499.499.299.199.3
Percentage of Assets pnw:ArizonaPublicServiceCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1856118479183771816517854176641767117492171481701916977166691619216004158051553815185150281487514701144351431313980136901345013508138221356213300133791346013214131831311113150124741230212362124351215811986
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1845418370182921807417756175651754917337170081689316851165461608715931156781548015134149821483814640143411421513936135801335913381136751348413230132421335013146130981303213074123741219612271
Percentage of LiabilitiesAndStockholdersEquity99.499.499.599.599.599.499.399.199.299.399.399.399.499.599.299.699.799.799.899.699.399.399.799.299.399.198.999.499.599.099.299.599.499.499.499.299.199.3
Percentage of Assets99.499.499.599.599.599.499.399.199.299.399.399.399.499.599.299.699.799.799.899.699.399.399.799.299.399.198.999.499.599.099.299.599.499.499.499.299.199.3
Percentage of Assets pnw:ArizonaPublicServiceCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value54695430555252335251522253535032501950065142485948284803485345854599458346534392439643674491423342224194427540324014397240563778374438213894361336313683371634793316
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.529.430.228.829.429.630.328.829.329.430.329.229.830.030.729.530.330.531.329.930.530.532.130.931.431.130.929.730.229.730.128.628.429.129.629.029.529.829.928.627.7

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value59125876599356735690566156255285526752565237495249294905494646754687467947574494449944784599434243314308439241424125409341813902386539434013374637663824
Percentage of StockholdersEquity108.1108.2107.9108.4108.4108.4105.1105.0104.9105.0101.9101.9102.1102.1101.9102.0101.9102.1102.2102.3102.3102.5102.4102.6102.6102.7102.7102.7102.8103.0103.1103.3103.2103.2103.1103.7103.7103.8
Percentage of Assets31.931.832.631.231.932.031.830.230.730.930.929.730.430.731.330.130.931.132.030.631.231.332.931.732.231.931.830.531.030.631.129.529.330.130.530.030.630.9
Percentage of Assets pnw:ArizonaPublicServiceCompany32.032.032.831.432.032.232.130.531.031.131.129.930.630.831.630.231.031.232.130.731.431.533.032.032.432.232.130.731.230.931.329.729.530.330.730.330.931.2

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value107810301133102887692412071118957101611741068794822977963826890106110319359731040999897104313501066871100510989479049561591103695893112431086928
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.85.66.25.74.95.26.86.45.66.06.96.44.95.16.26.25.45.97.17.06.56.87.47.36.77.79.87.96.67.58.27.26.97.312.18.37.87.510.08.97.7

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value103198111019958438931166109393499511581048789837930947809870105099486390010289178339441231102183490010239168579151554976891953
Percentage of AssetsCurrent95.695.397.296.896.396.696.697.797.698.098.798.199.3101.895.298.498.097.898.996.492.392.598.891.992.890.591.295.895.789.693.296.794.795.797.794.293.0102.3
Percentage of Assets5.65.36.05.54.75.16.66.35.55.86.86.34.95.25.96.15.35.87.16.86.06.37.46.76.27.08.97.56.36.77.66.96.57.011.87.87.27.7
Percentage of Assets pnw:ArizonaPublicServiceCompany5.65.36.05.54.85.16.66.35.55.96.96.34.95.35.96.15.45.87.16.86.06.37.46.86.27.19.07.66.36.87.77.06.57.011.97.97.37.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value631029165643151310438484314391313117109103913527252679112033564921141101955031451001710556
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.10.20.00.00.00.40.00.10.10.10.00.00.10.30.30.10.30.10.10.10.10.10.10.80.11.00.20.20.20.60.10.20.34.30.70.90.91.60.40.01.20.00.00.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value5310291656431413104288314225764591033113573532219555851049916235112071
Percentage of CashAndCashEquivalentsAtCarryingValue84.598.999.082.299.599.099.797.990.799.799.697.996.999.516.672.533.955.941.158.852.259.449.299.1100.039.183.521.429.213.467.724.810.059.298.393.091.490.782.870.546.683.168.0
Percentage of Assets0.30.10.20.00.00.00.40.00.10.10.10.00.00.10.10.20.00.10.00.10.00.00.00.10.80.00.80.00.10.00.40.00.00.24.20.70.80.81.30.30.01.00.0
Percentage of Assets pnw:ArizonaPublicServiceCompany0.30.10.20.00.00.00.40.00.10.10.10.00.00.10.10.20.00.10.00.10.00.00.00.10.80.00.80.00.10.00.40.00.00.24.20.70.90.80.00.00.00.00.0

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value8261677265566045514845454845434240373844453840484539364239372833322629303128434430
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.40.40.40.30.30.30.30.30.30.30.30.30.30.30.30.20.30.30.30.30.30.40.30.30.30.30.30.30.20.30.20.20.20.20.30.20.40.40.3

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value5738454944354142454139384341393939353744443840474539354239372833322928292725
Percentage of OtherAssetsCurrent69.662.866.968.867.362.667.692.687.685.586.785.588.692.992.492.196.596.097.998.598.699.798.598.698.798.197.899.1100.8101.5100.099.999.8109.198.199.187.188.6
Percentage of Assets0.30.20.20.30.20.20.20.20.30.20.20.20.30.30.30.30.30.20.30.30.30.30.30.30.30.30.30.30.30.30.20.30.20.20.20.20.20.2
Percentage of Assets pnw:ArizonaPublicServiceCompany0.30.20.20.30.30.20.20.20.30.20.20.20.30.30.30.30.30.20.30.30.30.30.30.40.30.30.30.30.30.30.20.30.20.20.20.20.20.2

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1993019836196771963018763187361844318328178961779817310172271743617341168771666316285162221599715926155511554315251154481525615200145971450314494143461411614048139281375313423133511327013201129871293212848
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets107.4107.3107.1108.1105.1106.1104.4104.8104.4104.6102.0103.3107.7108.4106.8107.2107.2107.9107.5108.3107.7108.6109.1112.8113.4112.5105.6106.9109.0107.2104.9106.3105.6104.9102.1107.0107.9106.8104.4106.4107.2

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1992719832196741962618760187331844018325177511765417195171121732417228167641666016282162181599315923155481553915247154441525315196145941449914490143421411214045139241375013419133471326613197
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.099.299.299.399.399.499.399.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets107.4107.3107.1108.0105.1106.1104.3104.8103.5103.7101.3102.7107.0107.7106.1107.2107.2107.9107.5108.3107.7108.6109.1112.8113.4112.5105.6106.9108.9107.2104.8106.3105.6104.9102.0107.0107.8106.8
Percentage of Assets pnw:ArizonaPublicServiceCompany108.0108.0107.6108.6105.6106.6105.1105.7104.4104.5102.0103.4107.7108.1106.9107.6107.6108.3107.8108.8108.4109.3109.4113.7114.2113.6106.7107.5109.5108.3105.7106.8106.3105.5102.6107.9108.8107.5

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value67846637655264706398636663286245623161286037595160605970589557335670559455375497545253975308538853605300510150224997492949014843477547094684467545804514445944004340
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.635.935.735.635.836.035.835.736.336.035.635.737.437.337.336.937.337.237.237.437.837.738.039.439.939.236.937.037.636.836.436.736.235.935.637.537.236.535.936.236.2

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value67816634654864676395636263256242614460415951586559745881580857305667559055345494544953945305538553575296509750194993492548984840477247064681467145764510
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.099.999.999.999.999.998.698.698.698.698.698.598.599.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.9
Percentage of Assets36.535.935.635.635.836.035.835.735.835.535.135.236.936.836.736.937.337.237.237.437.837.738.039.339.839.236.937.037.536.836.436.636.235.935.637.537.236.5
Percentage of Assets pnw:ArizonaPublicServiceCompany36.736.135.835.836.036.236.036.036.135.835.335.437.136.937.037.037.437.337.337.538.038.038.139.740.139.637.337.237.737.236.736.836.436.135.837.837.536.8

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1314613198131251315912364123701211512082116641166911272112751137611371109811093010615106281045910429100981014599421005998969900949694819497941692149205915290438738867686908687852785318507
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.871.471.472.469.370.068.669.168.068.666.467.670.371.169.570.369.970.770.370.970.070.971.173.573.673.368.769.971.470.468.569.769.469.066.569.670.670.368.670.271.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1314613198131251315912364123701211412082116071161211244112461134911346109561092910614106271045910429100981014599421005998959900949694809496941692139204915290438738867586898686
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.099.599.599.799.799.899.899.8100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.871.471.472.469.370.068.669.167.768.266.267.570.170.969.370.369.970.770.370.970.070.971.173.573.673.368.769.971.470.468.569.769.469.066.469.570.670.3
Percentage of Assets pnw:ArizonaPublicServiceCompany71.271.871.872.869.670.469.069.768.268.766.768.070.571.269.970.670.170.970.571.270.471.471.374.174.174.069.470.371.871.169.070.069.969.466.870.171.270.8

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2792902662612672622682572622572562652519096108116123134127127119127137144157160162162162152163170170176177182184178168164
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.61.51.41.51.51.51.51.51.51.51.61.60.60.60.70.80.80.90.90.90.80.91.01.11.21.21.21.21.21.11.21.31.31.31.41.51.51.41.41.4

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2792902662612672622682562622572562652518996108115123134127127119127136144157159162162161152163170170176177182184
Percentage of IntangibleAssetsNetExcludingGoodwill99.999.999.999.999.999.999.999.999.999.999.999.999.999.899.899.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.9
Percentage of Assets1.51.61.41.41.51.51.51.51.51.51.51.61.60.60.60.70.80.80.90.90.90.80.91.01.11.21.21.21.21.21.11.21.31.31.31.41.51.5
Percentage of Assets pnw:ArizonaPublicServiceCompany1.51.61.51.41.51.51.51.51.51.51.51.61.60.60.60.70.80.80.90.90.90.80.91.01.11.21.21.21.21.21.11.21.31.31.31.41.51.5

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value97961029799103106595884887170696854525252515154606160606064646262646464636364116112109110
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.50.60.60.60.30.30.50.50.40.40.40.40.40.30.30.40.40.40.40.40.40.50.50.40.50.50.50.50.50.50.50.50.50.50.90.90.90.9

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value4443554642404040416766494948483434343433333333343433333132313131313029292971
Percentage of OtherAssetsNoncurrent45.745.254.747.442.339.538.169.170.579.474.870.070.170.070.364.066.365.665.265.465.861.755.256.056.655.455.149.649.950.549.848.048.347.346.446.445.261.5
Percentage of Assets0.20.20.30.30.20.20.20.20.20.40.40.30.30.30.30.20.20.20.20.20.20.20.20.30.30.20.20.20.20.20.20.20.20.20.20.20.20.6
Percentage of Assets pnw:ArizonaPublicServiceCompany0.20.20.30.30.20.20.20.20.20.40.40.30.30.30.30.20.20.20.20.20.20.20.20.30.30.30.20.20.20.20.20.20.20.20.20.20.20.6

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value22952078158619001591164817342238187411971303163811931292110914781585144215231339137315591448155413941618144615378911083949110411571342178318311674131096712271108
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.411.28.610.58.99.39.812.810.97.07.79.87.48.17.09.510.49.610.29.19.510.910.411.410.412.010.511.36.78.17.18.48.810.213.614.713.610.67.810.19.3

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value17101492151418501526157616282137176110981068140796510941065146415761424159313491349153214711527137815801405150285910439021087112613221758181416531234
Percentage of LiabilitiesCurrent74.571.895.497.395.995.693.995.594.091.782.085.980.984.696.099.099.498.8104.6100.798.298.3101.698.398.997.797.197.796.496.395.098.597.398.598.699.198.894.2
Percentage of Assets9.28.18.210.28.58.99.212.210.36.56.38.46.06.86.79.410.49.510.79.29.310.710.511.210.311.710.211.16.57.86.78.28.510.113.414.513.410.0
Percentage of Assets pnw:ArizonaPublicServiceCompany9.38.18.310.28.69.09.312.310.46.56.38.56.06.96.89.510.49.510.79.29.410.810.611.210.311.810.311.16.57.96.88.38.610.113.414.713.610.1

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value301346276327263277249260205256236270250264248316234297233326271295278320224284250287212221231316265326281271215236253261240
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.91.51.81.51.61.41.51.21.51.41.61.51.71.62.01.52.01.62.21.92.12.02.31.72.11.82.11.61.71.72.42.02.52.12.21.81.92.02.12.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value294338268319257266241253198247227265245259241311232291229321265289272315219281243282207215223311260322274266204218
Percentage of AccountsPayableCurrent97.697.697.197.497.596.097.097.396.596.796.198.298.297.997.398.499.098.097.998.797.998.297.898.397.898.897.498.397.897.496.698.598.098.597.597.994.792.4
Percentage of Assets1.61.81.51.81.41.51.41.41.21.51.31.61.51.61.52.01.51.91.52.21.82.02.02.31.62.11.82.11.61.61.72.42.02.52.12.11.71.8
Percentage of Assets pnw:ArizonaPublicServiceCompany1.61.81.51.81.41.51.41.51.21.51.41.61.51.61.52.01.51.91.52.21.92.02.02.31.62.11.82.11.61.61.72.42.02.52.12.11.71.8

Taxes Payable Current

us-gaap:TaxesPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value194144220158199154226156194148228150182138219145181138250155188140249161179130183129164124190133160120191131155104157153104
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.81.20.91.10.91.30.91.10.91.30.91.10.91.40.91.20.91.71.11.31.01.81.21.31.01.31.01.20.91.41.01.20.91.51.11.30.81.31.30.9

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value190136215175230176263183211157233147178130252161183144346199190131300160173122178129159116176134156113192142170106
Percentage of TaxesPayableCurrent97.994.197.5110.7115.3113.9116.2117.5108.5105.6101.997.897.694.0115.0111.3100.8104.2138.3128.0100.893.2120.399.596.693.597.099.397.193.492.9100.397.794.7100.4108.0110.1101.6
Percentage of Assets1.00.71.21.01.31.01.51.11.20.91.40.91.10.81.61.01.21.02.31.41.30.92.21.21.30.91.31.01.20.91.31.01.20.91.51.11.40.9
Percentage of Assets pnw:ArizonaPublicServiceCompany1.00.71.21.01.31.01.51.11.20.91.40.91.10.81.61.01.21.02.31.41.30.92.21.21.30.91.31.01.20.91.31.01.20.91.51.11.40.9

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value121168161140114184169167184246207181152244222265180197208162150178195165136158181154124171157139115148150132103139141105125
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.90.90.80.61.01.01.01.11.41.21.10.91.51.41.71.21.31.41.11.01.31.41.21.01.21.31.10.91.31.21.10.91.11.11.10.81.11.10.91.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1331641591381141781651621802432021801492261862391721801871321301671741481181301521251021451311279314013211896132
Percentage of OtherLiabilitiesCurrent109.997.998.998.3100.396.797.597.597.598.997.699.498.392.883.990.495.591.290.081.686.593.589.390.087.482.583.981.482.284.783.991.380.994.388.089.193.495.0
Percentage of Assets0.70.90.90.80.61.00.90.91.01.41.21.10.91.41.21.51.11.21.30.90.91.21.31.10.91.01.10.90.81.11.01.00.71.11.00.90.81.1
Percentage of Assets pnw:ArizonaPublicServiceCompany0.70.90.90.80.61.00.90.91.11.41.21.10.91.41.21.51.11.21.30.90.91.21.31.10.91.01.10.90.81.11.01.00.71.11.01.00.81.1

Dividends Payable Current

us-gaap:DividendsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-06-302012-12-312012-06-302011-06-302010-06-302009-12-31
Value0870820820770770730720690690650650626259595757560
Percentage of DividendsPayableCurrent0.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.50.00.50.00.50.00.40.00.50.00.40.00.50.00.40.00.50.00.40.00.50.00.50.50.40.40.40.50.50.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-06-302012-12-312012-06-302011-06-30
Value0880820820770770730720690690650650626259595757
Percentage of DividendsPayableCurrent0.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.10.099.90.0100.00.099.9100.099.9100.0100.0100.0
Percentage of Assets0.00.50.00.50.00.50.00.40.00.50.00.40.00.50.00.40.00.50.00.40.00.50.00.50.50.40.40.40.5
Percentage of Assets pnw:ArizonaPublicServiceCompany0.00.50.00.50.00.50.00.40.00.50.00.40.00.50.00.40.00.50.00.50.00.50.00.50.50.40.50.40.5

Long Term Debt

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value48334832498448864886463844874191429047894491419242734021414538973463346232573565328130313037299930452796282028203304319933383371334130193046276128453045346333263496
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.026.227.126.927.426.325.424.025.028.126.525.226.425.126.225.122.823.021.924.322.721.221.721.922.620.720.420.824.823.924.825.525.323.023.222.123.124.627.927.429.2

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312011-12-312010-12-31
Value48334833453544374437418941883893449128943045
Percentage of LongTermDebtNoncurrent100.0100.091.090.890.890.393.392.993.895.9100.0
Percentage of Assets26.026.224.724.424.923.723.722.326.422.124.6
Percentage of Assets pnw:ArizonaPublicServiceCompany26.226.324.824.625.023.923.922.526.622.224.8

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2732802973563844433163192843274094604695094014404414803834254124532334394425139391013103410581206124312771268877869824813737728811
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.51.62.02.22.51.81.81.71.92.42.82.93.22.52.82.93.22.62.92.93.21.73.23.33.86.87.57.87.99.09.49.79.76.77.06.76.65.96.06.8

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value25526228134036742529629926330638944044948838041942045935639738442420340340547690197499410171162119812311222836827782770
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent93.693.694.595.395.596.093.993.893.093.795.195.695.695.994.895.295.195.492.993.493.193.687.491.991.792.795.996.196.196.196.496.496.496.395.395.294.994.8
Percentage of Assets1.41.41.51.92.12.41.71.71.51.82.32.62.83.12.42.72.83.12.42.72.73.01.52.93.03.56.57.27.57.68.69.19.39.36.46.66.46.2
Percentage of Assets pnw:ArizonaPublicServiceCompany1.41.41.51.92.12.41.71.71.61.82.32.72.83.12.42.72.83.12.42.72.73.01.53.03.03.66.67.27.57.78.79.19.49.46.46.76.46.3

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1271221291241301251321271331291351301371321381331401351371321561511521471541451451371371291291211161081081019791111113111
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.70.70.70.70.70.70.80.80.80.80.80.80.90.90.90.90.90.91.11.11.11.11.21.11.11.01.01.01.00.90.90.80.80.80.80.70.90.90.9

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1271221291241301251321271331291351301371321381331401351371321561511521471541451451371371291291211161081081019691
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.799.799.799.299.299.1
Percentage of Assets0.70.70.70.70.70.70.70.70.80.80.80.80.80.80.90.90.90.90.90.91.11.11.11.11.21.11.11.01.01.01.00.90.90.80.80.80.80.7
Percentage of Assets pnw:ArizonaPublicServiceCompany0.70.70.70.70.70.70.80.70.80.80.80.80.90.80.90.90.90.90.90.91.11.11.11.11.21.11.11.01.01.01.00.90.90.80.80.80.80.7

us-gaap:ConsolidatedEntities, dei:LegalEntity

us-gaap:VariableInterestEntityPrimaryBeneficiary, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-31
Value127122
Percentage of MinorityInterest100.0100.0
Percentage of Assets0.70.7
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary pnw:ArizonaPublicServiceCompany0.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value163159166144149147161168155148158168162156190198194186184196191188177196184185178191307283248209219217170142144132127130144
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.90.90.80.80.80.91.00.90.90.91.01.01.01.21.31.31.21.21.31.31.31.31.41.41.41.31.42.32.11.81.61.71.71.31.11.21.11.01.11.2

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value14113614312112512513914714013314315414814314014814514214215915314413615515314814516127725020917218918214111411796
Percentage of OtherLiabilitiesNoncurrent86.885.485.984.084.385.086.687.590.289.890.691.391.291.673.775.274.876.677.381.380.076.977.179.483.080.081.884.790.588.484.582.586.083.882.880.781.473.2
Percentage of Assets0.80.70.80.70.70.70.80.80.80.80.80.90.90.90.91.01.00.91.01.11.11.01.01.11.11.11.11.22.11.91.61.31.41.41.10.91.00.8
Percentage of Assets pnw:ArizonaPublicServiceCompany0.80.70.80.70.70.70.80.80.80.80.90.90.90.90.91.01.01.01.01.11.11.01.01.11.11.11.11.22.11.91.61.31.41.41.10.91.00.8

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value54695430555252335251522253535032501950065142485948284803485345854599458346534392439643674491423342224194427540324014397240563778374438213894361336313683371634793316
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.529.430.228.829.429.630.328.829.329.430.329.229.830.030.729.530.330.531.329.930.530.532.130.931.431.130.929.730.229.730.128.628.429.129.629.029.529.829.928.627.7

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value59125876599356735690566156255285526752565237495249294905494646754687467947574494449944784599434243314308439241424125409341813902386539434013374637663824
Percentage of StockholdersEquity108.1108.2107.9108.4108.4108.4105.1105.0104.9105.0101.9101.9102.1102.1101.9102.0101.9102.1102.2102.3102.3102.5102.4102.6102.6102.7102.7102.7102.8103.0103.1103.3103.2103.2103.1103.7103.7103.8
Percentage of Assets31.931.832.631.231.932.031.830.230.730.930.929.730.430.731.330.130.931.132.030.631.231.332.931.732.231.931.830.531.030.631.129.529.330.130.530.030.630.9
Percentage of Assets pnw:ArizonaPublicServiceCompany32.032.032.831.432.032.232.130.531.031.131.129.930.630.831.630.231.031.232.130.731.431.533.032.032.432.232.130.731.230.931.329.729.530.330.730.330.931.2

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value26642659265426482644263426292624262026142608260425952596255225492547254125292526252325122502250024972491248924862484246624562453245024442441243824342421241824112153
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.414.414.414.614.814.914.915.015.315.415.415.616.016.216.216.416.816.917.017.217.517.617.918.318.618.418.018.318.718.418.218.618.618.618.619.519.819.619.419.818.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value28672837294926372659264127802465245424422576230022782255234220792097209221901933194219262052180818011785188616591648162417211476146815341579132313511423147312391298
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.415.416.114.514.915.015.714.114.314.415.213.814.114.114.813.413.813.914.713.213.513.514.713.213.413.213.612.212.412.112.811.211.111.712.010.611.011.511.910.210.8

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value30473011311928012816278829092570254825332661237723542331241321432155214822431982198819682084183318231804189916641650162417161469144915101553130713341403
Percentage of RetainedEarningsAccumulatedDeficit106.3106.1105.8106.2105.9105.6104.6104.3103.8103.7103.3103.4103.3103.4103.0103.1102.8102.7102.4102.5102.4102.2101.6101.4101.3101.1100.7100.3100.1100.099.899.598.798.598.498.898.798.6
Percentage of Assets16.416.317.015.415.815.816.514.714.914.915.714.314.514.615.313.814.214.315.113.513.813.814.913.413.613.413.712.312.412.112.811.111.011.511.810.510.811.4
Percentage of Assets pnw:ArizonaPublicServiceCompany16.516.417.115.515.915.916.614.815.015.015.814.414.614.615.413.814.214.315.113.513.913.815.013.513.713.513.912.312.512.312.911.211.111.611.910.610.911.4

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value79555411250124000511230004101010411645552223
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value-55-57-46-47-46-47-55-56-52-45-42-43-42-43-42-43-43-44-63-65-66-68-62-74-74-78-89-104-107-114-119-150-167-152-121-142-149-159-173-169-131
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.5-0.5-0.4-0.5-0.6-0.6-0.6-0.8-0.8-0.9-0.9-1.1-1.3-1.2-0.9-1.1-1.2-1.3-1.4-1.4-1.1

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-34-35-26-27-26-27-33-35-30-26-23-25-24-25-27-44-45-46-48-42-49-50-53-64-79-83-89
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax61.562.256.557.356.056.861.362.158.960.056.157.656.958.060.668.869.670.070.968.666.666.968.472.176.277.078.1
Percentage of Assets-0.2-0.2-0.1-0.2-0.1-0.2-0.2-0.2-0.2-0.2-0.1-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.5-0.6-0.6-0.7
Percentage of Assets pnw:ArizonaPublicServiceCompany-0.2-0.2-0.1-0.2-0.1-0.2-0.2-0.2-0.2-0.2-0.1-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.5-0.6-0.6-0.7

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value183121488172173317563228166346481150140258342278144272427250144212249212115243180368215-13296568
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.718.241.119.823.442.044.523.524.145.640.715.920.734.929.430.421.337.235.628.121.529.336.330.918.636.926.532.326.2-2.244.852.2

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value193177495146188266582228177356479152173243339272153268426252152221273228114254-64
Percentage of NetCashProvidedByUsedInOperatingActivities105.4145.3101.485.0108.584.1103.299.8106.3103.199.5101.2123.994.399.297.9106.798.299.8101.1106.1104.3109.9107.699.5104.5469.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.226.441.616.925.435.345.923.425.647.040.516.125.633.029.129.822.736.535.528.422.830.539.933.218.538.6-10.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-341-298-304-273-254-279-234-318-361-388-351-339-348-241-295-343-372-293-263-276-232-288-208-176-235-192-198-99-67-210-1684
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-51.5-44.6-25.6-31.4-34.4-37.0-18.5-32.6-52.1-51.2-29.7-35.9-51.4-32.7-25.3-37.5-55.0-40.0-22.0-31.1-34.7-39.8-30.4-25.7-37.9-29.2-29.1-8.7-8.2-33.9-25.50.4

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-342-291-308-276-259-281-238-311-354-382-344-331-342-235-283-336-363-289-262-275-232-288-208-176-235-192-207
Percentage of NetCashProvidedByUsedInInvestingActivities100.497.5101.2101.2102.1100.9101.998.198.398.497.997.698.497.696.098.197.698.799.799.4100.099.8100.0100.0100.0100.098.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-51.7-43.5-25.9-31.8-35.1-37.3-18.8-32.0-51.2-50.4-29.1-35.1-50.6-31.9-24.3-36.8-53.7-39.5-21.9-30.9-34.7-39.7-30.4-25.7-37.9-29.2-33.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value210157-1569681-97-2687719546-124190202-56-429320346-16428927353-36106-46-68-123-10082-83-490
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.823.5-13.111.111.0-12.8-21.28.028.36.1-10.520.229.9-7.6-3.610.230.06.4-13.73.213.810.17.8-5.317.2-7.1-9.9-10.8-12.313.3-12.6-45.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value19294-15912572-44-2827317729-129180163-6-799019238-16624816534-47102-57152
Percentage of NetCashProvidedByUsedInFinancingActivities91.360.3101.8130.288.645.4105.294.690.863.3104.094.780.612.4188.696.994.781.8101.385.387.789.864.6130.595.9122.6185.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.014.2-13.414.49.7-5.8-22.37.525.73.8-10.919.224.1-0.9-6.89.928.45.2-13.92.712.19.15.0-6.916.5-8.724.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value183121488172173317563228166346481150140258342278144272427250144212249212115243180368215-13296568
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.718.241.119.823.442.044.523.524.145.640.715.920.734.929.430.421.337.235.628.121.529.336.330.918.636.926.532.326.2-2.244.852.2

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value193177495146188266582228177356479152173243339272153268426252152221273228114254-64
Percentage of NetCashProvidedByUsedInOperatingActivities105.4145.3101.485.0108.584.1103.299.8106.3103.199.5101.2123.994.399.297.9106.798.299.8101.1106.1104.3109.9107.699.5104.5469.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.226.441.616.925.435.345.923.425.647.040.516.125.633.029.129.822.736.535.528.422.830.539.933.218.538.6-10.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value3468317149223031917182628017228582671269452611272092481412423413932252130026293-9122391190-2519172
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.310.326.617.13.14.125.217.61.23.523.718.24.27.923.013.81.46.321.814.33.11.321.215.63.620.415.24.822.814.8-0.123.411.7-1.51.821.014.6-0.1-3.817.58.9

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4072323155334934318214322891732863274132124826612924192551432824314234255132325394-62319416
Percentage of ProfitLoss115.4105.8102.1104.0145.4159.5107.3106.5178.8123.2102.9101.099.5109.0102.3104.7130.0106.0101.6101.9118.1208.3102.9101.7115.2103.7102.0104.9101.2102.0-761.396.6101.168.397.079.5-1796.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.110.927.217.84.56.527.118.82.14.324.418.44.18.623.514.41.86.622.214.63.62.721.815.94.121.115.55.023.115.10.622.611.9-1.020.311.62.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value444444444444444444444448888887777554
Percentage of ProfitLoss14.07.11.53.321.415.71.52.860.218.41.72.817.38.41.83.952.310.61.93.622.243.31.76.336.13.66.025.63.26.0-1616.62.87.6-56.52.14.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.40.60.70.60.40.50.70.60.40.50.70.70.40.50.70.70.40.50.70.60.41.01.30.70.91.20.70.91.30.70.90.80.40.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value29633121441726315166321276167235326312144125712216524313215
Percentage of ProfitLoss86.092.998.596.778.684.398.597.239.881.698.397.282.791.698.296.147.789.498.196.477.856.798.393.763.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.59.526.216.62.43.424.817.10.52.823.317.73.47.222.513.30.75.621.413.82.40.720.814.62.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4444444444
Percentage of ProfitLoss14.07.11.53.321.415.71.52.860.218.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.40.60.70.60.40.50.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value35673181502844338177927
Percentage of ProfitLoss101.498.7100.5100.8124.1143.7105.8103.6118.6104.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.310.126.817.33.85.926.718.31.43.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value173163168164167161164161163164154143147142140141140143145140141124122124118123122120115114112115
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value173163168164167161164161162164153143147141140141140143145140141124122124118123113
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.099.499.699.799.799.799.799.799.7100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.2

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-533-2813-14-26164-340-250-11489-70913-216-5-7-6-4-4
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-533-2813-14-26164-340-250-11489-70913-21-6
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.099.4100.898.9100.698.694.698.998.8100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-341-298-304-273-254-279-234-318-361-388-351-339-348-241-295-343-372-293-263-276-232-288-208-176-235-192-198-99-67-210-1684
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-51.5-44.6-25.6-31.4-34.4-37.0-18.5-32.6-52.1-51.2-29.7-35.9-51.4-32.7-25.3-37.5-55.0-40.0-22.0-31.1-34.7-39.8-30.4-25.7-37.9-29.2-29.1-8.7-8.2-33.9-25.50.4

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-342-291-308-276-259-281-238-311-354-382-344-331-342-235-283-336-363-289-262-275-232-288-208-176-235-192-207
Percentage of NetCashProvidedByUsedInInvestingActivities100.497.5101.2101.2102.1100.9101.998.198.398.497.997.698.497.696.098.197.698.799.799.4100.099.8100.0100.0100.0100.098.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-51.7-43.5-25.9-31.8-35.1-37.3-18.8-32.0-51.2-50.4-29.1-35.1-50.6-31.9-24.3-36.8-53.7-39.5-21.9-30.9-34.7-39.7-30.4-25.7-37.9-29.2-33.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value210157-1569681-97-2687719546-124190202-56-429320346-16428927353-36106-46-68-123-10082-83-490
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.823.5-13.111.111.0-12.8-21.28.028.36.1-10.520.229.9-7.6-3.610.230.06.4-13.73.213.810.17.8-5.317.2-7.1-9.9-10.8-12.313.3-12.6-45.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value19294-15912572-44-2827317729-129180163-6-799019238-16624816534-47102-57152
Percentage of NetCashProvidedByUsedInFinancingActivities91.360.3101.8130.288.645.4105.294.690.863.3104.094.780.612.4188.696.994.781.8101.385.387.789.864.6130.595.9122.6185.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.014.2-13.414.49.7-5.8-22.37.525.73.8-10.919.224.1-0.9-6.89.928.45.2-13.92.712.19.15.0-6.916.5-8.724.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value0297297049715029500298297-32550247445024203502501572501043191750000026
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-31
Value029729704970295000297-325502474450242035025032250104319
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.00.0100.00.0100.00.00.00.0100.0100.0100.00.0100.0100.00.0100.00.0100.0100.020.4100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value150100005001000820125016276700148375175226911435218
Percentage of RepaymentsOfLongTermDebt100.0100.00.00.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312012-03-312011-03-312010-03-31
Value15010000500100082000162767002337500
Percentage of RepaymentsOfLongTermDebt100.0100.00.00.0100.0100.00.0100.00.00.00.0100.0100.0100.00.016.1100.00.18.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value150100005001000820125016276700148375175226911435218
Percentage of RepaymentsOfLongTermDebt100.0100.00.00.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312012-03-312011-03-312010-03-31
Value15010000500100082000162767002337500
Percentage of RepaymentsOfLongTermDebt100.0100.00.00.0100.0100.00.0100.00.00.00.0100.0100.0100.00.016.1100.00.18.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations pnw:ArizonaPublicServiceCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value612112322103329-82816
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

Deferred Tax Assets Net

Unrecognized Tax Benefits

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312019-01-012018-12-31
Value1441451561761931940
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1421441541741910
Percentage of OperatingLeaseRightOfUseAsset98.898.898.898.999.00.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value63102916564315131048
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value53102916564314131048
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents84.598.999.082.299.599.099.797.990.799.799.697.999.5

Proceeds From Repayments Of Short Term Debt

Proceeds From Sale Of Longterm Investments

us-gaap:PublicUtilitiesRegulatoryProceeding, dei:LegalEntity

pnw:AmountofAdjustmentRepresentingProratedSalesLossesPendingApproval

pnw:LostFixedCostRecoveryMechanisms, pnw:ArizonaPublicServiceCompany



Period End2020-02-142019-02-152018-02-15
Value263660
Percentage of AmountofAdjustmentRepresentingProratedSalesLossesPendingApproval100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:LostFixedCostRecoveryMechanisms, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-142019-02-15
Value2636
Percentage of AmountofAdjustmentRepresentingProratedSalesLossesPendingApproval100.0100.0

us-gaap:CreditFacility, us-gaap:EnvironmentalRemediationContingency, us-gaap:JointlyOwnedUtilityPlant, dei:LegalEntity

pnw:AssetPurchaseAgreementAdditionalPercentageShareofCostofControl

pnw:NaturalGasTollingLetterOfCredit, pnw:RegionalHazeRules, pnw:FourCornersUnits4And5, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.070.00.00.00.070.0
Percentage of AssetPurchaseAgreementAdditionalPercentageShareofCostofControl100.00.00.00.0100.00.0

us-gaap:EnvironmentalRemediationContingency, us-gaap:EnvironmentalRemediationSite, dei:LegalEntity

pnw:AssetPurchaseAgreementSiteContingencyIncreaseinLossExposureNotAccruedBestEstimate

pnw:CoalCombustionWaste, pnw:FourCorners, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value22000220
Percentage of AssetPurchaseAgreementSiteContingencyIncreaseinLossExposureNotAccruedBestEstimate100.00.00.00.0100.00.0

pnw:CoalCombustionWaste, pnw:NavajoGeneratingStation, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1000000.00.00.00.01000000.00.0
Percentage of AssetPurchaseAgreementSiteContingencyIncreaseinLossExposureNotAccruedBestEstimate4.50.00.00.04.50.0

us-gaap:EnvironmentalRemediationContingency, us-gaap:EnvironmentalRemediationSite, us-gaap:JointlyOwnedUtilityPlant, dei:LegalEntity

pnw:RegionalHazeRules, pnw:FourCorners, pnw:FourCornersUnits4And5, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value45000450
Percentage of AssetPurchaseAgreementSiteContingencyIncreaseinLossExposureNotAccruedBestEstimate204.50.00.00.0204.50.0

us-gaap:Range, us-gaap:EnvironmentalRemediationContingency, us-gaap:EnvironmentalRemediationSite, dei:LegalEntity

srt:Minimum, pnw:CoalCombustionWaste, pnw:Cholla, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value15000150
Percentage of AssetPurchaseAgreementSiteContingencyIncreaseinLossExposureNotAccruedBestEstimate68.20.00.00.068.20.0

pnw:DeferredInvestmentTaxCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0420420120
Percentage of DeferredInvestmentTaxCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0420420120
Percentage of DeferredInvestmentTaxCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

pnw:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeOnDiscontinuation

us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value00000000000000000000000000000-10
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeOnDiscontinuation0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.0

pnw:DividendsCommonStockNet



Period End2020-03-31
Value8000.0
Percentage of DividendsCommonStockNet100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-31
Value8000.0
Percentage of DividendsCommonStockNet100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:ForwardComponentofPSARate1

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:ArizonaPublicServiceCompany



Period End2020-02-012019-02-012018-02-012017-08-192017-02-01
Value-0.0020860.0005360.0020090.000876-0.001027
Percentage of ForwardComponentofPSARate1100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value-0.002086
Percentage of ForwardComponentofPSARate1100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:HistoricalComponentofPSARate1

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:ArizonaPublicServiceCompany



Period End2020-02-012019-02-012018-02-012017-08-192017-02-01
Value0.001630.0011220.002546-0.000321-0.000321
Percentage of HistoricalComponentofPSARate1100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value0.00163
Percentage of HistoricalComponentofPSARate1100.0

pnw:IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-110151012244130203-4-9-4914112-17755981-24-31-26-40-29-253149
Percentage of IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-110151012244130203-4-9-4914112-17755981-24-31-25
Percentage of IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-110151012244130203
Percentage of IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, dei:LegalEntity

pnw:IncreaseDecreaseinAmountofAdjustmentRepresentingProratedSalesLosses

pnw:LostFixedCostRecoveryMechanisms, pnw:ArizonaPublicServiceCompany



Period End2020-02-142019-02-152018-02-152017-01-132016-01-15
Value-9-24-3177
Percentage of IncreaseDecreaseinAmountofAdjustmentRepresentingProratedSalesLosses100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:LostFixedCostRecoveryMechanisms, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-142019-02-15
Value-9-24
Percentage of IncreaseDecreaseinAmountofAdjustmentRepresentingProratedSalesLosses100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, pnw:PublicUtilitiesRegulatoryRegulatoryMatters, dei:LegalEntity

pnw:MaximumIncreaseDecreaseinPSARate1

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, us-gaap:SubsequentEvent, pnw:CostRecoveryMechanisms, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value0.004
Percentage of MaximumIncreaseDecreaseinPSARate1100.0

pnw:MiscellaneousOtherNonoperatingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value21201320112010201020102-2210110211000
Percentage of MiscellaneousOtherNonoperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value21001310111020112010200-1211210202001
Percentage of MiscellaneousOtherNonoperatingExpense100.0100.015.9100.399.6100.039.898.799.9127.538.7375.8149.6174.948.7483.5160.3376.952.54571.4142.3154.039.775.6105.258.3785.1158.861.0386.0122.976.4144.6379.995.6192.5

pnw:MiscellaneousOtherNonoperatingIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value000000000000000000000-622200000000000
Percentage of MiscellaneousOtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value000000000000010000000-522200100000001
Percentage of MiscellaneousOtherNonoperatingIncome100.0100.0100.0120.095.7100.0101.150.0100.063.4643.6644.313866.79080.06400.00.00.068800.05633.3-2511.1457.689.7114.1122.7124.01634.127250.0193.5667.31344.3260.04366.743800.011633.3100.0546.8

pnw:NonoperatingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value212322231413122224212212221112111121
Percentage of NonoperatingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value212322231413232215212222222222112121
Percentage of NonoperatingCosts93.490.092.587.691.294.794.193.393.5102.299.6110.3110.6139.9108.5130.495.9105.196.696.2111.998.6115.8109.5109.1111.6114.8120.1122.0123.194.1106.4147.3127.7101.2141.6

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:PSARate1

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:ArizonaPublicServiceCompany



Period End2020-02-012019-02-012018-02-012017-08-192017-02-01
Value-0.0004560.0016580.0045550.000555-0.001348
Percentage of PSARate1100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value-0.000456
Percentage of PSARate1100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, pnw:PublicUtilitiesRegulatoryRegulatoryMatters, dei:LegalEntity

pnw:PSARateInPriorYears1

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:CostRecoveryMechanisms, pnw:ArizonaPublicServiceCompany



Period End2020-02-012019-02-012016-02-01
Value-0.002115-0.0028970.001678
Percentage of PSARateInPriorYears1100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, pnw:PublicUtilitiesRegulatoryRegulatoryMatters, dei:LegalEntity

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, us-gaap:SubsequentEvent, pnw:CostRecoveryMechanisms, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value-0.002115
Percentage of PSARateInPriorYears1100.0

pnw:PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value19521313017920212813176
Percentage of PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value19521313017920212813176
Percentage of PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds100.0100.0100.0100.0100.099.9100.0100.0

us-gaap:EnvironmentalRemediationContingency, us-gaap:JointlyOwnedUtilityPlant, dei:LegalEntity

pnw:PercentageOfShareOfCostOfControl

pnw:RegionalHazeRules, pnw:FourCornersUnits4And5, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.630.00.00.00.630.0
Percentage of PercentageOfShareOfCostOfControl100.00.00.00.0100.00.0

pnw:ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value19521113017918412713076
Percentage of ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value19521113017918412713076
Percentage of ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds100.0100.0100.0100.0100.099.9100.0100.0

pnw:ProceedsfromRepaymentsofShorttermDebtNet



Period End2020-03-312019-03-31
Value-76172
Percentage of ProceedsfromRepaymentsofShorttermDebtNet100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value0157
Percentage of ProceedsfromRepaymentsofShorttermDebtNet-0.091.2

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:RateMattersIncreaseDecreaseinCostRecovery

pnw:EnvironmentalImprovementSurcharge, pnw:UnitedStatesFederalEnergyRegulatoryCommission, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value8
Percentage of RateMattersIncreaseDecreaseinCostRecovery100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:EnvironmentalImprovementSurcharge, pnw:UnitedStatesFederalEnergyRegulatoryCommission, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-01
Value-8
Percentage of RateMattersIncreaseDecreaseinCostRecovery-100.0

us-gaap:RegulatoryAsset

pnw:RegulatoryCostRecoveryIncomeDebtDeferralRefunded

pnw:OctotilloDeferral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value6775000
Percentage of RegulatoryCostRecoveryIncomeDebtDeferralRefunded100.0100.0100.0100.00.00.00.0

pnw:SCRDeferral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value34444444
Percentage of RegulatoryCostRecoveryIncomeDebtDeferralRefunded51.165.865.192.30.00.00.00.0

us-gaap:RegulatoryAsset, dei:LegalEntity

pnw:OctotilloDeferral, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value67750000
Percentage of RegulatoryCostRecoveryIncomeDebtDeferralRefunded100.0100.0100.0100.00.00.00.00.0

pnw:SCRDeferral, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value34444444
Percentage of RegulatoryCostRecoveryIncomeDebtDeferralRefunded51.165.865.192.30.00.00.00.0

pnw:RegulatoryCostRecoveryRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14111312209112010
Percentage of RegulatoryCostRecoveryRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0

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us-gaap:VariableInterestEntityPrimaryBeneficiary, pnw:SaleLeasebackTransactionPeriodThrough2023, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value1.0
Percentage of SaleLeasebackTransactionNumberOfLeasesUnderWhichAssetsRetainedThroughSpecifiedPeriod100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, pnw:SaleLeasebackTransactionPeriodThrough2033, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value2.0
Percentage of SaleLeasebackTransactionNumberOfLeasesUnderWhichAssetsRetainedThroughSpecifiedPeriod200.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs



Period End2020-03-31
Value2
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0

us-gaap:AllowanceForFundsUsedDuringConstructionInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-4-3-3-4-6-6-5-6-6-6-6-4-4-5-4-5-5-4-3-4-4-4-3-3-3-3-4-6-3-3-2-1
Percentage of AllowanceForFundsUsedDuringConstructionInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-4-3-3-4-6-6-5-6-6-6-6-4-4-5-4-4-5-4-3-4-4-4-3-3-3-3-3
Percentage of AllowanceForFundsUsedDuringConstructionInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.094.396.499.199.399.7100.0100.0100.0100.0100.0100.098.0

us-gaap:PropertyPlantAndEquipmentByType, dei:LegalEntity

us-gaap:AssetRetirementObligationPeriodIncreaseDecrease

pnw:FourCorners, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value-11
Percentage of AssetRetirementObligationPeriodIncreaseDecrease100.0

pnw:NavajoGeneratingStation, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value5
Percentage of AssetRetirementObligationPeriodIncreaseDecrease-45.5

dei:LegalEntity

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value324213010170022422121112111121223211
Percentage of AvailableForSaleSecuritiesGrossRealizedGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType, dei:LegalEntity

pnw:NuclearDecommissioningTrusts, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value324130
Percentage of AvailableForSaleSecuritiesGrossRealizedGains100.096.199.9100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value0.0104000.04000.00.00.00.0
Percentage of AvailableForSaleSecuritiesGrossRealizedGains0.03.90.10.00.00.0

dei:LegalEntity

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value2121161228112331122110212311111112
Percentage of AvailableForSaleSecuritiesGrossRealizedLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType, dei:LegalEntity

pnw:NuclearDecommissioningTrusts, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value212161
Percentage of AvailableForSaleSecuritiesGrossRealizedLosses100.0100.0100.0100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-31
Value10056-2212953333-208637121792336-45947-2-17562024613
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-31
Value10056-2212953333-208635123782434-45947-2-17562024613
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.099.899.994.497.1300.999.6105.496.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value52-1928-40-5961-11135
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value43-1928-40-5961-10035
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect81.799.099.9105.9108.799.899.988.39.7100.0101.1

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-18-857903083330361168410111296236810258622812-1-41-21230050-4976
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-17-48107-9-1-26759047114788501105631504822277812-2-4747
Percentage of DeferredIncomeTaxExpenseBenefit98.357.1135.6-1334.3-33.312218.590.629.0-232.8127.998.393.585.9419.685.990.997.9218.747.037.734.8350.598.7104.9102.8117.093.9

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value000000000-1-1-1-1-1-1
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-9-10-10-10-11-8-8-8-7-11-11-11-12-10-10
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.00.00.00.00.00.00.00.00.0935.6936.31038.0858.9887.4887.4

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.00.00.00.00.00.00.00.00.020000.020000.020000.020000.0132000.0132000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.2-0.2-0.2-0.2-1.4-1.4

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value109999101010101313131399
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value464242434245454545434343434343
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets467.2447.5447.5448.3446.7434.5434.5435.0434.1326.4326.4325.3327.4476.5476.6

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value677777767777777
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value293434343431313131323232323232
Percentage of DefinedBenefitPlanInterestCost457.0457.7457.8459.1456.4443.0443.0449.4436.7433.2433.1433.9432.3443.0443.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-7-6-6-7-6-7-7-7-7-9-9-10-9-6-6
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6141413157777141413151313
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-86.6-205.4-205.4-188.1-223.5-99.7-99.7-105.2-94.3-149.4-149.4-137.8-161.8-210.5-210.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value544445555444433
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value141212121214141414131313131313
Percentage of DefinedBenefitPlanServiceCost249.4271.7271.6277.6266.1268.6268.6259.3278.4320.4320.4325.4315.7358.8358.8

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument, us-gaap:CostOfSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value0000000000-1000-1-10-1-1-2-9-3-4
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:CommodityContract, us-gaap:Nondesignated, us-gaap:CostOfSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-30-15-28-4981343-34-23-6-5-5230-3560-30-23-5010-44-65-23418-1-27171226-25
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-31
Value00011001100
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-31
Value263000.0257000.0187000.0218000.0233000.0218000.0192000.0232000.0252000.0240000.0240000.0
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity

us-gaap:ExtinguishmentOfDebtAmount

pnw:SeniorUnsecuredNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-01-15
Value150
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:GainLossOnSaleOfInvestments



Period End2020-03-312019-03-31
Value60000.0-238000.0
Percentage of GainLossOnSaleOfInvestments100.0100.0

us-gaap:IncomeTaxReconciliationDeductionsOther



Period End2020-03-312019-12-312019-12-31
Value65762
Percentage of IncomeTaxReconciliationDeductionsOther100.0100.0

us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry



Period End2020-03-31
Value14
Percentage of IncomeTaxReconciliationDeductionsOther233.3

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable



Period End2020-03-312019-03-31
Value-25-15
Percentage of IncreaseDecreaseInAccountsAndNotesReceivable100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value-15-16
Percentage of IncreaseDecreaseInAccountsAndNotesReceivable58.8106.9

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-516-313926-3-4862-250-46022-9-10486-3818-8972-356-5011-39-24-27-868-23813
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-416-313730-6-4864-243-49-222-11-10483-3418-9073-357-5212-39-18-22
Percentage of IncreaseDecreaseInAccountsPayable77.897.198.295.8115.7210.8100.9102.995.5659.1108.5718.1103.2115.6100.197.191.095.0100.8101.399.8112.9103.2108.1101.274.095.5

us-gaap:IncreaseDecreaseInAccruedTaxesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value49-7662-4145-7270-3745-7978-3143-8074-3643-11294-3248-10948393752
Percentage of IncreaseDecreaseInAccruedTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value54-7839-5454-8779-2754-7585-3147-12190-2138-202147959-16950434264
Percentage of IncreaseDecreaseInAccruedTaxesPayable108.8103.963.5133.2120.2121.0113.273.2117.795.0110.097.2109.4151.4122.158.989.6180.4155.1-28.3122.8155.1105.1110.6113.5121.8

us-gaap:IncreaseDecreaseInContractWithCustomerAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-34-27-3779-23-59-11886-39
Percentage of IncreaseDecreaseInContractWithCustomerAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-34-27-3779-23-59-11886-39
Percentage of IncreaseDecreaseInContractWithCustomerAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-31
Value-17000000-4-5530-4400-303-1300
Percentage of IncreaseDecreaseInIncomeTaxesReceivable100.0100.00.00.00.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312011-03-312010-03-31
Value1-80000014000000-134020
Percentage of IncreaseDecreaseInIncomeTaxesReceivable-125.1-113.10.00.00.00.0-0.0388.30.00.00.0-0.00.00.0103.1-60.30.00.0

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-63-15-724-8615321-12154857-10141-6691-38-163043-56-30-15-62-39-37-53316-392024
Percentage of IncreaseDecreaseInOtherAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-49-15-823-8115123-15164555-8836-7573-28-113933-65-21-5-58-5326-64
Percentage of IncreaseDecreaseInOtherAccruedLiabilities77.9100.3113.195.794.6103.055.0108.1131.1106.292.797.587.485.9114.279.975.670.2130.277.7115.169.333.193.3134.3-71.8163.2

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-8130-301765-6310-2838101236018231712-19-91499312133-846-2126-141
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-8230-302064-519-31-422101431-815211715-21-1017151029212923
Percentage of IncreaseDecreaseInOtherOperatingAssets101.3100.898.4117.598.581.397.4112.5-122.2260.2101.4115.684.6-1426.082.690.799.3119.3105.8112.3121.7170.1108.393.0100.989.089.2

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-106-105-30-1013235-7-70-4-38111-57-334427-75-428-24-34372235-7223-15-360-36
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value-105-102-30-1114234-13-69-5-39111-44-365-125-81-4113-27-28412744-31
Percentage of IncreaseDecreaseInOtherOperatingLiabilities99.096.7101.8107.2106.0100.285.1191.398.4105.4101.795.7117.777.1106.7113.5-24.392.9107.197.6168.8115.980.6110.2123.2125.187.3

us-gaap:IncreaseDecreaseInPrepaidExpense



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value20610-10-12-110-11-1617116-28-1-1009-810230-180581-27
Percentage of IncreaseDecreaseInPrepaidExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value1859-11-12-81-120515116-48-1-1009-8102407
Percentage of IncreaseDecreaseInPrepaidExpense89.983.594.9112.4100.974.9186.3107.568.383.086.5101.1101.5178.2100.5158.3101.4102.294.794.7101.3100.0121.7-39.095.9

us-gaap:IncreaseDecreaseInRegulatoryClauseRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value-5-21-44-33164-32-31-18-5-21-210-14-25-22115-11-517031314649
Percentage of IncreaseDecreaseInRegulatoryClauseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value-5-21-44-33164-32-31-18-5-21-210-14-25-22115-11-517031314649
Percentage of IncreaseDecreaseInRegulatoryClauseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-5-21-44-33164-32-31-18-5
Percentage of IncreaseDecreaseInRegulatoryClauseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsIncurred



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5959575760626160585755545150515250484948484847515250514952535662606162606060606059
Percentage of InterestCostsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value555653535658585756565353
Percentage of InterestCostsIncurred94.194.193.693.393.494.895.095.195.397.996.697.4

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value5351525063465748564252405437573256275930533149496255545157585365
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value524650456141564354415039533656325526582952314748615354
Percentage of InterestPaidNet96.990.296.689.996.389.397.790.497.998.396.596.697.997.598.898.599.097.699.197.998.697.796.698.298.195.892.3

us-gaap:InvestmentIncomeInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value322222121100000000000000000000000000
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value212111121100000000000000000000000000
Percentage of InvestmentIncomeInterest71.471.175.655.767.367.858.885.088.792.174.566.470.915.60.059.262.481.725.23.360.964.630.184.255.01.786.330.319.972.017.721.716.433.244.822.5

us-gaap:LitigationCase

us-gaap:LitigationSettlementAmountAwardedFromOtherParty

pnw:ArizonaPublicServiceCompanyandPaloVerdeOwnersvs.UnitedStatesDepartmentofEnergySpentNuclearFuelandWasteDisposal



Period End2020-02-112019-10-312019-04-102019-03-312018-10-312017-12-312014-08-18
Value1516101010957
Percentage of LitigationSettlementAmountAwardedFromOtherParty100.0100.0100.0100.0100.0100.0100.0

us-gaap:LitigationCase, dei:LegalEntity

pnw:ArizonaPublicServiceCompanyandPaloVerdeOwnersvs.UnitedStatesDepartmentofEnergySpentNuclearFuelandWasteDisposal, pnw:ArizonaPublicServiceCompany



Period End2020-02-112019-10-312019-04-102019-03-312018-10-312014-08-18
Value4433316
Percentage of LitigationSettlementAmountAwardedFromOtherParty29.229.429.429.429.429.1

us-gaap:LitigationCase, us-gaap:SubsequentEventType

pnw:ArizonaPublicServiceCompanyandPaloVerdeOwnersvs.UnitedStatesDepartmentofEnergySpentNuclearFuelandWasteDisposal, us-gaap:SubsequentEvent



Period End2020-02-112019-10-312019-04-10
Value151610
Percentage of LitigationSettlementAmountAwardedFromOtherParty100.0100.0100.0

us-gaap:LitigationCase, us-gaap:SubsequentEventType, dei:LegalEntity

pnw:ArizonaPublicServiceCompanyandPaloVerdeOwnersvs.UnitedStatesDepartmentofEnergySpentNuclearFuelandWasteDisposal, us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-02-112019-10-312019-04-10
Value443
Percentage of LitigationSettlementAmountAwardedFromOtherParty29.229.429.4

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value00-260-50-30-200-85-200-10
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0-250-50-40-200-80-200-10
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.099.790.70.097.7100.0113.5100.098.395.6100.097.7-1.898.599.8100.099.7100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value0-110-260-50-40-217000-85-200-1
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.0100.099.70.0100.0-0.0120.20.0100.30.00.0102.6-0.096.2101.8102.0-0.0-0.091.1

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value292000.00.00.00.018000.00.00.0-96000.0719000.09000.07000.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.00.00.0-0.00.30.0-0.0100.0-20.2100.0-0.3

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:AccumulatedDefinedBenefitPlansAdjustment, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-100-250-50-40
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.099.790.40.097.7-0.0133.70.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value292000.00.00.00.018000.00.00.0-96000.0719000.09000.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.00.00.0-0.00.30.0-0.0100.0-20.2100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax



Period End2020-03-312019-03-31
Value292000.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value292000.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax



Period End2020-03-312019-03-31
Value292000.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value292000.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax



Period End2020-03-312019-03-31
Value-20000.0-328000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value-20000.0-328000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax



Period End2020-03-312019-03-31
Value394000.0108000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-03-31
Value394000.0108000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value1-101-1171-41-2100-110019101-5110315363017-1521
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value1-90-1161-41-3101-110116101-560315353017-1521
Percentage of OtherComprehensiveIncomeLossNetOfTax87.387.388.6110.089.590.390.5100.696.5116.799.196.6109.363.499.7215.7108.388.1100.1105.5105.696.155.7103.8103.5100.0102.298.699.698.0100.999.6

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1-101-1171-41-2100-110019101-51103
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:AccumulatedOtherComprehensiveIncome, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1-90-1161-41-3
Percentage of OtherComprehensiveIncomeLossNetOfTax87.387.388.6110.089.590.390.5100.696.5116.7

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value-110010-7-14030102000-180007-5100000000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value-19010-604030101000-1600070100000000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax84.187.585.8107.485.690.086.6100.595.2114.498.498.1117.070.999.491.6115.387.8100.163.2116.897.212.397.9123.999.488.891.388.758.185.088.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value03000-201010001000-110005-3000000000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value03000-201010000000-1000040000000000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax219.494.285.9107.585.890.086.7100.569.1116.798.698.283.870.899.491.886.587.8100.063.588.797.512.3-98.084.499.488.991.388.858.084.988.1

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value03000107013101010200100001221131192418156855
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value030001000131
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.05.8100.0100.1100.0100.0

us-gaap:OtherNonoperatingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value435445533943335245524124047235243311352514
Percentage of OtherNonoperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4223353327654434473253315446334343463
Percentage of OtherNonoperatingExpense97.683.349.278.889.095.166.489.491.278.4125.4147.9119.0140.272.5155.9117.6134.571.693.9124.929.576.9290.7107.962.1216.8167.858.8149.6113.799.8146.0211.4105.7107.6134.5

us-gaap:OtherNonoperatingIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value121515127766311000000000022220000000012402146
Percentage of OtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value11141411666632111105000002232001010011211
Percentage of OtherNonoperatingIncome92.694.895.790.789.589.588.494.594.7145.8135.5236.0221.2326.2798.62917.3521.41159.7467.6405.7271.9128.9110.4115.8116.7450.6202.1177.2194.0575.167.1139.9221.4117.068.1195.884.6

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value0-2-1-2-4-1-431-11810017000010000011-5-5132
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value0-9101000101600013000000000011
Percentage of PaymentsForProceedsFromOtherInvestingActivities-257.9399.0-107.3-18.3-24.9-27.9-0.91.391.1-36.391.552.897.6-50.779.9-10.1100.071.529.79.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value8686818180807676757571717171676767676464645862585555555555515151
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value888882828282777777777373727269696969656565656259575742
Percentage of PaymentsOfDividendsCommonStock102.0101.7102.0102.1102.2102.3102.2102.3102.4102.4102.4102.5102.4102.5102.5102.6102.6102.6102.6102.7102.7111.7100.0103.0103.2103.382.7

us-gaap:PaymentsToAcquireProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value340333316281259279218318361381334344348260283353378297247279251291207182240191195174176202206164
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value340333316281259279218315355373328337343255275347369293247279250291207182240191199
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.199.9100.0100.099.098.397.998.397.898.498.097.198.597.798.899.9100.0100.099.8100.0100.0100.0100.098.4

us-gaap:PensionAndOtherPostretirementBenefitExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13-5-5-6-5-12-12-12-12-5-6-6-6
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-14-6-6-6-5-12-12-12-13-4-6-6-6
Percentage of PensionAndOtherPostretirementBenefitExpense102.5106.8106.6106.0107.5102.9102.9103.2102.697.699.199.199.1

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-5-5-4-5-4-5-5-5-5-3-4-5-4-3-3
Percentage of PensionAndOtherPostretirementBenefitExpense39.287.286.379.494.242.843.042.643.674.174.171.876.80.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value177782222576766
Percentage of PensionAndOtherPostretirementBenefitExpense-9.6-130.0-132.0-109.8-161.2-20.7-20.3-23.1-17.4-110.7-110.7-98.9-124.20.00.0

us-gaap:ProceedsFromContributionInAidOfConstruction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value3361510753108-161252410161212-713271171413971012236-15
Percentage of ProceedsFromContributionInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value3361510753108-161252410161212-71327117141392
Percentage of ProceedsFromContributionInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value75100490009363569863400
Percentage of ProceedsFromLinesOfCredit100.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5400000000250000
Percentage of ProceedsFromLinesOfCredit71.80.00.00.00.00.00.00.069.40.00.00.00.0

us-gaap:ProceedsFromRepurchaseOfEquity



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-120-200-202-11118029
Percentage of ProceedsFromRepurchaseOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value19519821113017920917312513319076125153
Percentage of ProceedsFromSaleOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType, dei:LegalEntity

pnw:NuclearDecommissioningTrusts, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value178102155122152148
Percentage of ProceedsFromSaleOfAvailableForSaleSecurities91.351.673.468.572.985.5

pnw:OtherSpecialUseFunds, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value169556565725
Percentage of ProceedsFromSaleOfAvailableForSaleSecurities8.748.426.631.527.114.5

us-gaap:ProvisionForDoubtfulAccounts



Period End2020-03-31
Value3
Percentage of ProvisionForDoubtfulAccounts100.0

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value43346656666445455434
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value43346656666445445434
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.094.396.499.199.399.7

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value76571112121314141210911101010979987775665547555555324
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value7657111212131414121091110101097998777566554755555
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-1-1-1-1-1-1-1-10-1-1-1-2-3-6-2-3-15-5-6
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-10-1-1-1-1-1-10-1-1-1-2-3-6-2-3-15-5-5
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax84.388.690.589.588.590.590.196.7100.099.199.3100.1103.8100.5100.099.8103.1100.0101.498.6

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-10000-1-1-1000000000000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax98.40.080.168.672.884.070.972.368.8137.752.759.30.00.049.422.822.111.028.012.86.318.016.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-20000.0-187000.0-218000.0-404000.0-328000.0-211000.0-451000.0-456000.0-409000.0255000.0-710000.0-564000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax1.60.019.931.427.216.029.127.731.2-37.747.340.7

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:AccumulatedDefinedBenefitPlansAdjustment, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1000000-1000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax82.70.068.859.162.372.561.462.465.5137.751.8

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-20000.0-187000.0-218000.0-404000.0-328000.0-211000.0-451000.0-456000.0-409000.0255000.0-710000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax1.60.019.931.427.216.029.127.731.2-37.747.3

us-gaap:RepaymentsOfLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2263552525702532000
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1100000000250000
Percentage of RepaymentsOfLinesOfCredit48.50.00.00.00.00.00.00.0100.00.00.00.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value224220000
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.00.00.00.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value224220000
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ConsolidatedEntities, pnw:SaleLeasebackTransactionPeriod, dei:LegalEntity

us-gaap:SaleLeasebackTransactionAnnualRentalPayments

us-gaap:VariableInterestEntityPrimaryBeneficiary, pnw:SaleLeasebackTransactionPeriod2016Through2023, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value23
Percentage of SaleLeasebackTransactionAnnualRentalPayments100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, pnw:SaleLeasebackTransactionPeriod2024Through2033, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value16
Percentage of SaleLeasebackTransactionAnnualRentalPayments69.6

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value23484.0136375.042156.021273.0180426.0143947.025727.028259.0145793.0149294.024196.055632.0194995.0171683.044870.027976.052122.0194772.035600.055538.0159730.0180806.038500.041391.0108362.0
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesTreasuryStockReissued

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value51968.00.0375.05052.070655.07858.0366.011464.0116543.00.015574.012599.0179592.02726.00.06036.0179056.00.00.08225.0109896.00.02696.011004.0146590.0
Percentage of StockIssuedDuringPeriodSharesTreasuryStockReissued100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.00.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueNewIssues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value45649444554902325122310142222222223322255
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value4564944455490232512231010225
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.074.7100.0113.1228.7

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value40006000901114000100007400300-60
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-03-31
Value0.00.00.00.00.00.00.012000.03000.08000.0-3000.012000.0-10000.00.0-7000.07000.08000.0
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued0.00.00.00.00.00.00.00.90.30.1100.02.8-0.10.0-1.40.10.2

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value400060019011140001000070007
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued100.00.0100.0100.0100.0100.2100.0100.1100.0-0.099.099.899.999.5-0.097.4100.1100.00.0101.499.90.0175.9100.2230.9

dei:LegalEntity

us-gaap:StockholdersEquityPeriodIncreaseDecrease

pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value-2000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-31
Value1000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease-50.0

us-gaap:RetainedEarnings



Period End2020-03-31
Value-1000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease50.0

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value1000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease-50.0

us-gaap:RetainedEarnings, pnw:ArizonaPublicServiceCompany



Period End2020-03-31
Value-3000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease150.0

us-gaap:TaxesExcludingIncomeAndExciseTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5654535555545153535145444340414242424343434140444543404036414234403734373131223432
Percentage of TaxesExcludingIncomeAndExciseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5654535555545153050444343404042424243434241404345434039364142333937373131
Percentage of TaxesExcludingIncomeAndExciseTaxes100.0100.0100.0100.0100.0100.0100.099.40.399.399.399.299.299.599.199.899.899.899.8100.299.5100.099.499.599.599.499.499.499.399.399.498.999.199.099.399.399.1

us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value20724.045599.0103.00.075791.048625.0101.00.081177.054599.06140.02702.0153470.056143.00.00.071962.061471.00.00.093280.056107.01165.00.082474.0
Percentage of TreasuryStockSharesAcquired100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.00.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value24006400640012400440063004
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value24006400640012400440063004
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.00.0100.0

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value221229238227245256246268265266224214219208217242243222220210214260223211212238233229223237220216210228210210256232221215207221198215
Percentage of UtilitiesOperatingExpenseMaintenanceAndOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value218226235224240236226251254255215208212197209233238219216208209253212208208229222224220233218213208226207208252228217211203
Percentage of UtilitiesOperatingExpenseMaintenanceAndOperations98.698.798.798.597.992.391.893.995.895.996.097.396.594.796.296.598.298.798.098.697.797.495.198.597.896.195.498.198.998.498.998.898.999.299.099.198.598.198.098.298.1

us-gaap:WeightedAverageNumberOfSharesRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value00000000000000000000000000101
Percentage of WeightedAverageNumberOfSharesRestrictedStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding



Period End2020-05-012020-02-142019-10-312019-08-012019-04-242019-02-152018-11-012018-07-272018-04-252018-02-162017-10-272017-07-262017-04-252017-02-172016-10-282016-07-222016-04-222016-02-122015-10-232015-07-242015-04-242015-02-132014-10-242011-04-25
Value112112112112112112112111111111111111111111111111111111110110110110110109
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value419521475473451397459424413
Percentage of AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:CoalReclamationandUnionTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value25224524324123823623321621732
Percentage of CoalReclamationandUnionTrust100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value25224524324123823623321621530
Percentage of CoalReclamationandUnionTrust100.0100.0100.0100.0100.0100.0100.0100.099.093.3

pnw:CommonStockValueCommonAndTreasury



Period End2020-03-312019-12-31
Value26572650
Percentage of CommonStockValueCommonAndTreasury100.0100.0

pnw:ConstructioninProgress



Period End2020-03-312019-12-31
Value942808
Percentage of ConstructioninProgress100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-31
Value942808
Percentage of ConstructioninProgress100.0100.0

pnw:DecommissioningFundInvestmentsFairValueNetPendingSecuritiesSalesandPurchases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value418521475476453398459427417
Percentage of DecommissioningFundInvestmentsFairValueNetPendingSecuritiesSalesandPurchases100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value22-162200
Percentage of DecommissioningFundInvestmentsFairValueNetPendingSecuritiesSalesandPurchases0.50.5-0.31.40.60.5-0.10.1

us-gaap:FinancialInstrument, dei:LegalEntity

pnw:DecommissioningandOtherSpecialUseFundInvestmentsFairValue

us-gaap:FixedIncomeSecurities, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value735724696683661
Percentage of DecommissioningandOtherSpecialUseFundInvestmentsFairValue100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity

us-gaap:FixedIncomeSecurities, pnw:ActiveUnionMedicalTrust, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-30
Value184177
Percentage of DecommissioningandOtherSpecialUseFundInvestmentsFairValue25.124.6

us-gaap:FixedIncomeSecurities, pnw:CoalReclamationEscrowAccounts, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-30
Value6062
Percentage of DecommissioningandOtherSpecialUseFundInvestmentsFairValue8.28.7

us-gaap:FixedIncomeSecurities, pnw:NuclearDecommissioningTrusts, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-09-30
Value490483
Percentage of DecommissioningandOtherSpecialUseFundInvestmentsFairValue66.766.8

pnw:DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-12-31
Value777059307376574747573481712800006151203726417267527
Percentage of DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-12-31
Value777059307376574747573481712800006151203726417267527
Percentage of DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, dei:LegalEntity

pnw:DeferredFuelandPurchasedPowerRegulatoryAssetLiabilityCurrent

pnw:PowerSupplyAdjustor, pnw:ArizonaCorporationCommission, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value77705930737657474757312
Percentage of DeferredFuelandPurchasedPowerRegulatoryAssetLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

pnw:DerivativeAssetLiabilityAmountNotOffsetAgainstCollateral

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value000-1-1-1-1-1-1-30-2-4-4-4-3-4-3-6-3-6-7-7-7
Percentage of DerivativeAssetLiabilityAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

pnw:DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value-84-70-69-78-45-57-76-90-111-91-83-92-96-49-93-81-149-135-135-111-97-71-15-53
Percentage of DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

pnw:DerivativeAssetLiabilityFairValueGrossAssetLiability

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value-84-70-69-78-45-57-76-90-111-91-83-95-96-49-93-81-167-154-149-129-154-115-55-72
Percentage of DerivativeAssetLiabilityFairValueGrossAssetLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

pnw:DerivativeAssetLiabilityFairValueGrossLiabilityAssetandObligationtoReturnandRighttoReclaimCashOffset

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value00000000000-30000-17-18-13-17-56-43-40-19
Percentage of DerivativeAssetLiabilityFairValueGrossLiabilityAssetandObligationtoReturnandRighttoReclaimCashOffset0.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:EquityAndLongTermDebtLessCurrentMaturitiesAndLeaseback

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1087410831106581023510258997699469305939398779864927593409059910585828166815280278068781275367664736474077126723369747442729675247270719869457033643365336961
Percentage of EquityAndLongTermDebtLessCurrentMaturitiesAndLeaseback100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

pnw:RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value225203197184135166209229253248258220155106122108168149140135148138110787697120106941441225587978762
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAsset

pnw:AG1Deferral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value222222222220000
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent1.21.41.41.52.01.61.31.21.01.11.00.00.00.00.0

pnw:CoalReclamation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value111111111110000000000088888888882222
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent0.50.80.80.81.10.90.70.70.40.40.40.20.30.40.30.40.20.30.00.00.00.07.310.310.58.26.77.58.55.66.614.52.32.12.33.2

pnw:DeferredFuelAndPurchasedPowerMTMCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value5136415529314142625245453003030867163536651145151519111858433542
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent23.018.221.130.221.719.019.618.624.521.017.620.819.40.025.228.551.148.045.039.344.637.012.75.212.514.213.29.032.766.744.340.267.7

pnw:DeferredFuelandPurchasedPower



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value77705930737657474757348171280
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent34.534.530.116.65.622.331.432.629.530.528.621.811.311.76.70.0

pnw:DeferredPropertyTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value888888888880000000000000
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent3.84.24.34.66.35.14.13.73.43.53.30.00.00.00.00.00.00.00.00.00.00.00.00.0

pnw:FourCornersCostDeferral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value888888888886666666777700
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent3.64.04.14.46.04.83.93.53.23.33.13.04.36.35.56.24.04.55.05.24.75.10.00.0

pnw:LostFixedCostRecovery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value282625252932364854596775706155494845434543383334322519147
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent12.812.813.114.022.019.417.221.121.524.126.134.045.457.445.245.928.930.430.733.329.127.530.043.642.125.815.813.24.9

pnw:RetiredPowerPlantCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value282828282828282526272819999999101010101033333
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent12.513.914.315.320.816.913.411.310.511.011.18.66.49.38.19.15.96.67.17.46.87.29.13.83.93.12.52.8

pnw:TaxExpenseAdjustorMechanism



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value012350
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent0.40.81.51.74.00.0

pnw:TaxExpenseOfMedicareSubsidy



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value111111111111111111222222222222222222
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent0.50.60.60.70.90.70.60.50.50.50.60.71.01.41.21.40.91.01.41.51.41.41.82.62.62.11.71.92.11.41.63.62.32.12.33.2

pnw:TransmissionCostAdjustor



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value66550376614820003004568121310
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent2.73.12.52.90.22.33.42.72.70.51.73.71.30.00.00.02.40.00.03.66.47.98.210.012.36.9

us-gaap:DeferredIncomeTaxCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value666666553366665555555544444444333333
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent3.03.33.33.54.83.92.82.61.51.52.42.84.05.94.45.03.23.73.63.73.43.63.65.15.34.13.33.84.32.82.55.53.43.13.44.8

us-gaap:InvestmentCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value11111111112222111122222211111111
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent0.50.50.50.60.80.60.50.50.40.40.81.01.42.01.51.71.11.21.41.51.41.41.82.61.31.00.80.91.10.70.81.8

us-gaap:LossOnReacquiredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value111111111111111111111111111112111111
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent0.70.80.80.91.21.00.80.70.60.70.60.71.01.51.31.50.91.00.70.70.70.70.91.31.31.00.80.91.11.40.81.81.11.01.11.6

us-gaap:OtherRegulatoryAssetsLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value0123310004600000000112112211
Percentage of RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent0.00.91.42.22.31.20.20.20.01.92.40.10.60.40.30.00.00.00.00.70.71.40.91.32.62.10.80.7

us-gaap:RegulatoryAsset, dei:LegalEntity

pnw:RegulatoryAssetNetBookValue

pnw:NavajoPlant, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value79828083858890
Percentage of RegulatoryAssetNetBookValue100.0100.0100.0100.0100.0100.0100.0

pnw:RetiredPowerPlantCosts, pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value69737781858993
Percentage of RegulatoryAssetNetBookValue87.389.096.297.6100.0101.1103.3

pnw:RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value279234208231260165159156136100120911019910411613514514815212913115411413699888177889690908894143139
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAgency, us-gaap:RegulatoryLiability

pnw:ArizonaCorporationCommission, pnw:TaxCutsandJobsActof2017ExcessDeferredIncomeTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value113593868910000
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent40.525.518.529.635.10.00.00.00.0

pnw:UnitedStatesFederalEnergyRegulatoryCommission, pnw:TaxCutsandJobsActof2017ExcessDeferredIncomeTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value666666660
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent2.32.73.02.72.43.83.94.00.0

us-gaap:RegulatoryLiability

pnw:DeferredGainsonUtilityProperty



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2223344444422222222222
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent0.91.01.41.51.52.72.82.83.24.43.72.32.02.12.01.81.51.41.41.31.61.5

pnw:DemandSideManagement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value11514711416104312000446617831
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent0.66.46.93.10.68.810.16.53.03.110.10.00.00.04.14.34.94.211.55.323.7

pnw:FERCTransmissionTrueUp



Period End2020-03-312019-12-312019-09-302018-12-31
Value3100
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent1.20.40.00.0

pnw:FourCornersCoalReclamation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value5111111111100000000
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent2.00.50.90.80.71.11.21.21.41.91.50.00.00.00.00.00.00.00.0

pnw:OtherRegulatoryLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value001000021000020002813310101141664873
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent0.10.20.70.20.00.00.21.91.20.00.20.00.02.30.50.00.11.75.48.62.30.80.00.90.014.34.51.06.76.74.58.54.92.2

pnw:SpentNuclearFuel



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value66567676666000000333555556565109975544
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent2.42.82.82.82.83.94.94.24.86.95.40.00.00.00.00.00.02.12.02.03.93.83.24.43.76.15.77.46.511.49.410.07.85.75.32.82.9

pnw:SundanceMaintenance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0541610000000000000
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent0.12.42.20.72.60.80.00.00.00.00.00.00.00.00.00.00.00.00.0

pnw:TaxExpenseAdjustorMechanism



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value67103713150
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent2.43.00.70.02.04.78.811.50.0

us-gaap:DeferredIncomeTaxCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-31
Value2222222222222111111110110
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent1.01.21.31.21.11.71.81.82.12.62.12.82.51.81.71.51.30.80.70.70.80.00.60.70.0

us-gaap:InvestmentCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value2222222222444433333334333322221111
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent0.80.91.00.90.81.31.31.41.62.23.64.74.34.43.63.22.82.52.02.02.33.11.92.62.23.02.32.52.62.31.01.11.11.1

us-gaap:PostretirementBenefitCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value373737373737373737373232323233333434333332320
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent13.516.018.216.314.522.823.724.127.637.627.135.932.332.731.928.725.223.422.321.724.824.40.0

us-gaap:RemovalCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value44474750503930282618373737292726323941443731312928282627
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent16.020.222.821.919.524.019.318.419.718.231.341.636.829.926.522.724.027.327.728.928.723.720.125.420.628.329.530.7

us-gaap:RenewableEnergyProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value45394240474441383223171122262835414328292525403535332743
Percentage of RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent16.416.720.317.518.427.126.224.923.923.114.812.622.126.827.730.930.630.018.919.119.419.126.030.725.733.330.748.9

us-gaap:SubsequentEventType, dei:LegalEntity

pnw:RegulatoryMattersDemandSideManagementFunds

us-gaap:SubsequentEvent, pnw:ArizonaPublicServiceCompany



Period End2020-05-05
Value36
Percentage of RegulatoryMattersDemandSideManagementFunds100.0

pnw:RegulatoryMattersLongtermDebtLimit



Period End2020-03-31
Value7500
Percentage of RegulatoryMattersLongtermDebtLimit100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-26
Value5900
Percentage of RegulatoryMattersLongtermDebtLimit0.0

pnw:SpecialUseFundInvestmentsOtherGrossFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value25224524324123823623321832
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2452392342272202182111920
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue97.197.996.094.492.592.590.388.11.4

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value648121617202431
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue2.41.93.45.26.87.28.911.497.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6711311451214
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue2.72.90.85.54.819.15.16.5

us-gaap:FairValueInputsLevel1, us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value238232232214208173199178
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue94.495.095.288.987.773.485.281.5

us-gaap:FairValueInputsLevel2, us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6481216172024
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue2.41.93.45.26.87.28.911.4

us-gaap:FinancialInstrument

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8731413451315
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue3.23.11.45.95.519.45.97.1

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6481216172024
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue2.41.93.45.26.87.28.911.4

us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value238232232214208173199178
Percentage of SpecialUseFundInvestmentsOtherGrossFairValue94.495.095.288.987.773.485.281.5

pnw:SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value101010110
Percentage of SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value10101011
Percentage of SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases100.0100.0100.0100.0100.0100.0100.0100.0

pnw:TotalDeferredDebits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1575157315551594160715191391142114281601171617401640161915331507152115281430140413781360116789685784912441332130713081469149615601564117211761174122610441018979
Percentage of TotalDeferredDebits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value15681567154815871600151413751406141815971701172516231607152515021517152414261400137413561163895856848124313311306130714661493155615611168117111711160
Percentage of TotalDeferredDebits99.699.699.699.699.699.798.998.999.399.799.199.199.099.399.599.799.799.799.799.799.799.799.699.999.999.999.999.999.999.999.899.899.899.899.799.699.794.6

pnw:TotalInvestmentsAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value127013521313128912561190124711491137955932893875848848827813799779794797785768765740726698691694669667653659627584604589625621578673
Percentage of TotalInvestmentsAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value121712991267123811991128118111301118938910872854827828807795781761776779764741738713699671659662638636619626593550570554580
Percentage of TotalInvestmentsAndOtherAssets95.896.196.596.095.494.894.798.498.398.297.697.697.697.697.697.697.897.797.797.797.897.496.596.596.496.396.195.395.495.495.394.894.994.694.294.494.092.8

us-gaap:AccountsReceivableGrossCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value258266361263249267370321212305425293191250325278215274362289242297391325245299427345267277365316238284365294309324387283301
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value258255351253238257350299198292417285190262323278215274361281238297391325245299426344266274363314234280358291276288
Percentage of AccountsReceivableGrossCurrent99.895.997.096.195.596.294.493.293.696.098.097.399.9104.899.499.999.899.999.997.498.5100.0100.099.999.899.799.899.799.699.199.699.298.298.698.198.989.388.9

us-gaap:AccumulatedDeferredInvestmentTaxCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-30
Value1961961931972002001982022052052052062092101801841861871881761781781771811521521151199985
Percentage of AccumulatedDeferredInvestmentTaxCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value19619619319720020019820220520520520620921018018418618718817617817817718115215211511999
Percentage of AccumulatedDeferredInvestmentTaxCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:AdditionalPaidInCapitalCommonStock

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value27212721272127212721272125712571257125712421242124212421237923792379237923792379237923792379237923792379237923792379237923792379237923792379237923792379
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables



Period End2020-03-312019-12-312018-12-31
Value884
Percentage of AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value88732453223213322332233223322343234377766
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value88732453223213322332233223322343234377
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.094.497.495.8

dei:LegalEntity

us-gaap:AssetRetirementObligation

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312018-12-312017-12-312017-09-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value659657726679670624470462443449448408391352532357280329302
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value101112212219139641889111513282628283239352532
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1011122122191395418881116172826282832393533
Percentage of AssetRetirementObligationCurrent100.0100.0100.0100.0100.0100.0100.0100.092.288.383.594.994.895.397.1103.1131.6100.0100.0100.0100.0100.0100.099.9100.3

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value649646736723712706682677677674669631623615458446429415421419379358350356344313364362358357294289284279258255244328323317301
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value649646736723712706682677669666660623615607450446429415421419379358350356344313364362358357294289284279258255244328
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.098.898.898.798.798.798.798.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1201125612121192115810891147109511369111418233029303333303336414853506260698474
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value435411405395383373357336145
Percentage of AssetsFairValueDisclosure36.332.833.433.133.134.231.230.714089.9

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value345323331322322319330332355
Percentage of AssetsFairValueDisclosure28.825.727.327.127.829.328.830.334349.4

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000010021
Percentage of AssetsFairValueDisclosure0.00.00.00.00.10.00.00.2100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value41252824158511
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value300026112
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value697691696672670635667639467
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value234337297291222248
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value100000
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.00.00.00.0100.00.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value117312551211119211571087114010891077901
Percentage of AvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value32074210
Percentage of AvailableForSaleSecurities0.30.20.00.60.40.30.10.1

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Period End2020-03-312019-12-312019-09-302018-12-31
Value22-12
Percentage of AvailableForSaleSecurities0.20.2-0.10.2

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Period End2020-03-312019-12-312019-09-302018-12-31
Value1010
Percentage of AvailableForSaleSecurities0.10.00.10.1

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Period End2020-03-312019-12-312019-09-302018-12-31
Value9201010967851
Percentage of AvailableForSaleSecurities78.580.579.978.3

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Period End2020-03-312019-12-312019-09-302018-12-31
Value252245243236
Percentage of AvailableForSaleSecurities21.519.520.121.7

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value276363325315289230291261250260244229217197197188178169153173181176162161140
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value40002711982223400024311216
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value112105104115123130128
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-30
Value0.00.0720000.0
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue0.00.00.7

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Period End2020-03-312019-12-312019-09-30
Value112105103
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue100.0100.099.3

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value299299300284275217258
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-30
Value143138140
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue47.946.146.9

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Period End2020-03-312019-12-312019-09-30
Value182525
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue6.28.48.6

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Period End2020-03-312019-12-312019-09-30
Value137136133
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue45.945.544.4

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value232211209196197201206
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-30
Value413
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue1.80.91.6

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Period End2020-03-312019-12-312019-09-30
Value228209205
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue98.299.198.4

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value909910999868867
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-30
Value404037
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue45.340.733.7

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Period End2020-03-312019-12-312019-09-30
Value373132
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue41.532.229.7

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Period End2020-03-312019-12-312019-09-30
Value112640
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue13.227.236.7

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value735716724696683637661475
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302018-12-31
Value490478483446
Percentage of AvailableForSaleSecuritiesDebtSecurities66.766.866.870.1

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Period End2020-03-312019-12-312019-09-302018-12-31
Value244237240190
Percentage of AvailableForSaleSecuritiesDebtSecurities33.333.233.229.9

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value434536487487470447478425
Percentage of AvailableForSaleSecuritiesEquitySecurities100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302018-12-31
Value427529485402
Percentage of AvailableForSaleSecuritiesEquitySecurities98.498.799.689.9

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Period End2020-03-312019-12-312019-09-302018-12-31
Value67145
Percentage of AvailableForSaleSecuritiesEquitySecurities1.61.30.410.1

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Period End2020-03-312018-12-312018-09-302017-12-31
Value261510
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0

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Period End2020-03-312018-12-312018-09-302017-12-31
Value261510
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0771310384930
Percentage of CommercialPaper0.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value0033771580
Percentage of CommercialPaper0.00.023.13770.0415.80.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value93128155193114137196112
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value93128155193114137196112
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5464788487918970
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5464788487918970
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value212215192174155137125113
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value212215192174155137125113
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value5483563254345136513651385087479148724871469843994398414641624191382038193669366936653415340733683586333733873419332234963678
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value50335183498546874687468947884493457445734573427442734021403740663695369435443544354032893282324334613211326232943302319633713502
Percentage of DebtAndCapitalLeaseObligations91.892.091.791.391.391.394.193.893.993.997.397.297.297.097.097.096.796.796.696.696.696.396.396.396.596.396.396.30.096.296.495.2

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value449449449449448448298298298
Percentage of DebtAndCapitalLeaseObligations8.28.08.38.78.78.75.96.26.1

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Period End2020-05-052020-05-04
Value3150
Percentage of DebtInstrumentFaceAmount100.0100.0

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Period End2020-01-152019-11-202019-08-192019-02-28
Value250300300300
Percentage of DebtInstrumentFaceAmount0.00.00.00.0

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Period End2020-01-15
Value250
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DecommissioningTrustAssetsAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value9201010967950919851906873861871841822805779779767751735712723727713690682657642612595596570566544541513488497486469453424414
Percentage of DecommissioningTrustAssetsAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCreditsAndOtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value5836601561246020599460285963590258295895590658485759575355585443539554045302527052275204485047544632475351334994
Percentage of DeferredCreditsAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value5870604661205988597260125973589358535918591958645780577755075433539154055217522351795146479946884573467450364902
Percentage of DeferredCreditsAndOtherLiabilities100.6100.599.999.599.699.7100.299.9100.4100.4100.2100.3100.4100.499.199.899.9100.098.499.199.198.999.098.698.798.398.198.2

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value2016199219751838181118071813172716902945
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value2057203319761831181518121834175517422999
Percentage of DeferredIncomeTaxLiabilitiesNet102.0102.0100.099.6100.2100.3101.2101.6103.1101.8

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value9690315652462947892681931841751661911861901851721681561521800
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value9286285248432543852651901811721621871831871821691651531491770
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent96.095.888.593.493.092.187.592.295.798.698.298.298.198.098.298.298.298.298.298.298.198.098.30.0

us-gaap:DerivativeAssetFairValueGrossLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000332134
Percentage of DerivativeAssetFairValueGrossLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1012222443915232818149221812131547
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments, us-gaap:CommodityContract



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value0000000121164823444731
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset3.40.030.81.713.87.717.532.721.310.26.923.622.061.028.417.423.037.034.347.568.420.9

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value101232255511162535222311262317172288
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset103.4100.0100.0100.0130.8101.7113.8107.7117.5132.7121.3110.2106.9123.6122.0161.0128.4117.4123.0137.0134.3147.5168.4120.9

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value000000010000000000020000
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments, us-gaap:CommodityContract



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value0000000010000000120000
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement0.0-0.0-0.00.00.00.00.00.0741.00.00.00.00.00.0-0.00.0300.0126.70.00.00.00.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value000000010010000000140000
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0841.0100.0100.00.0100.0100.0100.0100.0400.0226.7100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssets

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value200001131100419616161513141313111722222025
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments, us-gaap:CommodityContract



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value0000000010000581215181817172326313435
Percentage of DerivativeAssets0.016.617.70.00.00.00.02.6472.617.90.00.00.032.853.576.1112.1125.8135.0127.8147.0138.7114.5141.4167.3139.7

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2000011311204196222528283332312937394149545462657488806082
Percentage of DerivativeAssets100.0100.0100.0116.6117.7100.0100.0100.0100.0102.6572.6117.9100.0100.0100.0131.9155.4176.0212.1225.8235.0227.8247.00.00.0238.8215.5239.2265.4241.30.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-85-71-70-79-47-58-78-92-113-94-84-94-100-53-97-85-154-139-142-115-104-78-22-7-10-61-72-98-93-97
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value200001131
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value201333265591528482430253732252628162432323842
Percentage of DerivativeFairValueOfDerivativeAsset131.8113.4217.4665.0407.3279.1213.2208.60.0273.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherInvestments, us-gaap:CommodityContract



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value001000012116414111518202324202527343941
Percentage of DerivativeFairValueOfDerivativeAsset2.414.2113.13.225.711.20.065.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value20134327661117295429443653504649533649
Percentage of DerivativeFairValueOfDerivativeAsset134.2113.4217.4679.3520.5282.3238.8219.70.0339.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value201333255
Percentage of DerivativeFairValueOfDerivativeAsset110.3107.0169.9597.8400.7282.1234.1157.3286.7

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000010021
Percentage of DerivativeFairValueOfDerivativeAsset23.86.447.581.5119.80.24.762.552.3

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-31
Value10000002110041961516151312131311172224
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments, us-gaap:CommodityContract



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-31
Value000000000000058121415181717232635
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral0.012.316.90.00.00.00.03.159.623.20.00.00.034.253.579.5106.3125.6141.5131.1153.2138.8115.3145.3

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1000000211004196212427272831312840
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0112.3116.9100.0100.0100.0100.0103.1159.6123.2100.0100.0100.0134.2153.5179.5206.3225.6241.5231.1253.2238.8

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeLiability

pnw:DeferredCredits, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value32332721152434464838374864536261889310092106825372749393100
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value55384460343645516959576461505965115113998397863950668278105
Percentage of DerivativeFairValueOfDerivativeLiability168.8115.2162.7280.6219.3147.9131.0110.2144.5155.0152.4134.395.493.095.4107.3131.3121.098.690.091.3103.773.870.189.288.884.1104.3

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value8771718250607998118979511212610412212620420720017520316992122
Percentage of DerivativeFairValueOfDerivativeLiability268.8215.2262.7380.6319.3247.9231.0210.2244.5255.0252.4234.3195.4193.0195.4207.3231.3221.0198.6190.0191.3203.7173.8170.1

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value796769684352698678
Percentage of DerivativeFairValueOfDerivativeLiability243.9204.9255.5319.5276.8214.5202.2185.7204.7

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value831136891119
Percentage of DerivativeFairValueOfDerivativeLiability24.910.37.361.142.533.428.724.550.2

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

pnw:DeferredCredits, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-31
Value3233272114243446473735466347585285899687735024706785
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-31
Value5337435731344246655548463721405188736652555219243448
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral164.5113.8158.1267.0213.1139.4125.5100.7137.1149.9134.398.959.946.169.997.7103.981.569.060.074.9103.281.534.750.356.6

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value867070794658779311292839210169991031741631621401291024494
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral264.5213.8258.1367.0313.1239.4225.5200.7237.1249.9234.3198.9159.9146.1169.9197.7203.9181.5169.0160.0174.9203.2181.5134.7

us-gaap:DerivativeInstrumentsAndHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value20000113110041961616151314131311151617222220252629343027385473686050
Percentage of DerivativeInstrumentsAndHedges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value20000113110041961616151314131311151617222220252629343027385473
Percentage of DerivativeInstrumentsAndHedges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsAndHedgesLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value5438445833354549675950484125455593777460625927211931536765735664895360587158556355
Percentage of DerivativeInstrumentsAndHedgesLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value5438445833354549675950484125455593777460625927211931536765735664895360587158
Percentage of DerivativeInstrumentsAndHedgesLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value877271804860799596102159137172153136124
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

pnw:DeferredCredits, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value32332721142434464737354663475852858996877350247067858285
Percentage of DerivativeLiabilities37.346.038.126.830.840.942.948.60.038.50.00.00.00.00.00.00.00.00.00.00.00.00.068.80.00.00.053.6

us-gaap:OtherLiabilities, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-31
Value54384458333545496759504841254555937774606259273153676573
Percentage of DerivativeLiabilities62.754.061.973.269.259.157.151.40.061.50.00.00.00.00.00.00.00.00.00.00.00.00.031.20.00.00.046.4

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value87727180486079951159686951057310310717816717014813611052102
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value32332721142434464737354663475852858996877350242329706785828581108648258575665808662
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value32332721142434464737354663475852858996877350242329706785828581108648258575665
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilityFairValueGrossAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000120021
Percentage of DerivativeLiabilityFairValueGrossAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset

pnw:DeferredCredits, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value000000000121164823443232281
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1012222443918232818142640323042331926
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset2964.00.00.00.0324.35969.4723.91303.0572.2305.9468.71187.71450.0423.7453.8164.01019.31043.7755.4639.9128.2104.467.21447.2

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value10123225551120253522232944373574664827
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset3064.00.00.00.0424.36069.4823.91403.0672.2405.9568.71287.71550.0523.7553.8264.01119.31143.7855.4739.9228.2204.4167.21547.2

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement

us-gaap:OtherLiabilities, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value111111222322444444887777
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value111111222322444444887777
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EnergyRelatedInventoryOtherFossilFuel



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1614182526254047482527293028343644454343443732383638343335313130262225262021212939
Percentage of EnergyRelatedInventoryOtherFossilFuel100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1614182526254047482527293028343644454343443732383638343335313130262225262021
Percentage of EnergyRelatedInventoryOtherFossilFuel100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesReceivable



Period End2020-03-312019-12-312019-09-302018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value20211400049300400033041351332220860222026
Percentage of IncomeTaxesReceivable100.0100.0100.00.00.00.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312014-09-302014-03-312013-12-312013-09-302012-12-312012-09-302012-03-312011-12-31
Value87150000111100001351260332
Percentage of IncomeTaxesReceivable42.433.7113.60.00.00.00.0117.5297.90.00.00.06.299.894.424.30.036.944.4

us-gaap:InterestPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value5353505050615356515649534852465744564054425241524748454944495061445456555454525454
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

pnw:ArizonaPublicServiceCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value5152484947605055485548524852455744563954415241524748454844495061445455545454
Percentage of InterestPayableCurrent95.298.394.998.395.098.695.198.595.198.599.399.499.599.499.299.599.499.599.299.699.699.599.399.699.699.599.499.699.699.599.399.499.599.599.299.799.199.6

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value6662626221113131312101010999936141419142213428172727169727272