MGM


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockParOrStatedValuePerShare
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostsAndExpenses
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:InterestExpense
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:IncomeTaxAuthority
us-gaap:IncomeTaxAuthority, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:IncomeTaxesPaidNet

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:Assets
dei:LegalEntity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:Liabilities
dei:LegalEntity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, dei:LegalEntity

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:LongTermDebtCurrent

us-gaap:AccountsPayableCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:DividendsPayableCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:DeferredTaxLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:OtherLiabilitiesNoncurrent
dei:LegalEntity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility
us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:CreditFacility

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility
us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:CreditFacility
us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensation

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet
us-gaap:IncomeTaxAuthority

us-gaap:UnrecognizedTaxBenefits
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:StatementGeographical

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

mgm:AdjustmentRelatedToRedeemableNoncontrollingInterests
us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:StatementScenario
mgm:AnnualTermLoanRepaymentPercentageOfInitialAggregatePrincipalAmount
us-gaap:ProductOrService
mgm:ChangeInContractAndContractRelatedLiabilities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
mgm:ChangeInIntercompanyPayableFinancingActivities
us-gaap:ConsolidationItems

mgm:CommissionsComplimentariesAndOtherIncentives

mgm:CorporateIncomeExpense
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

mgm:CostOfCasinoAndHotelOperationsAndReimbursableExpense
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:LongtermDebtType, us-gaap:StatementScenario
mgm:DebtInstrumentScheduledAmortizationPaymentsBeginningOnLastDayOfEachCalendarQuarterFromSpecifiedPeriodAsPercentageOfOriginalPrincipalBalance
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss

mgm:FinanceLeaseCost

mgm:FinanceLeaseInterestExpenseCredit
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:GainLossOnSaleOfBusinessPerShare

mgm:GainsLossesOnExtinguishmentOfDebtPerShare

mgm:GoodwillImpairmentAndPropertyTransactionsNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

mgm:IncomeLossFromUnconsolidatedAffiliates
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:IncomeLossFromUnconsolidatedAffiliatesRelatedToInvestmentsInREITs
us-gaap:CapitalUnitsByClass, dei:LegalEntity
mgm:IssuanceOfOperatingPartnershipUnits
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

mgm:NonOperatingItemsFromUnconsolidatedAffiliates

mgm:NoncashLeaseExpense
us-gaap:CapitalUnitsByClass, dei:LegalEntity
mgm:NumberOfForwardSharesSettled
us-gaap:StatementEquityComponents
mgm:OtherComprehensiveIncomeLossOtherTransactions

mgm:OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:IncomeTaxAuthority, us-gaap:BusinessAcquisition, us-gaap:StatementScenario
mgm:PaymentsRequiredUnderExtendedAnnualFeeArrangement

mgm:PreopeningAndStartUpExpensesNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:PreopeningCostsFromUnconsolidatedAffiliates

mgm:ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
mgm:ProceedsFromPaymentsToIntercompanyActivity
us-gaap:ConsolidationItems

mgm:ProceedsFromRelatedPartyTransactions

mgm:PropertyTransactionsNet
us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:SellingCostOfRealEstate

mgm:StockIssuedDuringPeriodValueRestrictedStockUnits
us-gaap:StatementEquityComponents
us-gaap:TitleOfIndividual
mgm:TransitionExpense

mgm:TripleNetOperatingLeaseAndGroundLeaseRentExpense

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
us-gaap:ConsolidationItems

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationAndAmortization
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:Dividends
us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:DividendsCommonStock
us-gaap:DebtInstrument
us-gaap:EarlyRepaymentOfSeniorDebt

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations
us-gaap:ConsolidationItems

us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationRevenue

us-gaap:FairValueOfAssetsAcquired

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:BusinessAcquisition, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:LongtermDebtType

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax
us-gaap:ConsolidationItems

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:IncomeLossFromSubsidiariesNetOfTax
us-gaap:ConsolidationItems

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestPaidNet
us-gaap:LeaseArrangementType
us-gaap:LeaseAndRentalExpense
us-gaap:LeaseArrangementType, us-gaap:SubsequentEventType

us-gaap:LoansAssumed1

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementClassOfStock, dei:LegalEntity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents, dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromRedemptions
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:NetCashProvidedByUsedInDiscontinuedOperations
us-gaap:ConsolidationItems

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments
us-gaap:IncomeStatementLocation
us-gaap:OperatingLeasesIncomeStatementLeaseRevenue
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherOperatingActivitiesCashFlowStatement
us-gaap:ConsolidationItems
us-gaap:OtherOperatingIncomeExpenseNet
us-gaap:Range, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:PartnersCapitalAccountRedemptions
us-gaap:SubsequentEventType, dei:LegalEntity

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity
us-gaap:PaymentsOfDistributionsToAffiliates

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:PaymentsOfDividendsMinorityInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems, us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireEquityMethodInvestments
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:PreOpeningCosts

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ProceedsFromRealEstateAndRealEstateJointVentures
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfSecuredDebt

us-gaap:RepaymentsOfSeniorDebt
us-gaap:BusinessAcquisition, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:RestructuringCharges

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:CapitalUnitsByClass, dei:LegalEntity
us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:CapitalUnitsByClass, us-gaap:SubsidiarySaleOfStock, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation
us-gaap:StatementClassOfStock, dei:LegalEntity
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents
us-gaap:Range, us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:TreasuryStockAcquiredAverageCostPerShare
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:VariableInterestEntityOwnershipPercentage
us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:AdvanceDepositsAndTicketSales

mgm:AssetsNoncurrentOtherThanPropertyPlantAndEquipment

mgm:CasinoFrontMoneyCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
mgm:CommonStockSharesAcquired
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxAssetsLeaseLiabilities
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxAssetsLongTermDebt
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxAssetsTaxDeferredExpenseReservesAccrualsAndOther
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxLiabilitiesRightOfUseAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCapitalizedInterest
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCompletionGuarantee
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityContribution
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredGain
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityNetAssetsContributed

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityOtherAdjustments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment

mgm:FairValueOfInterestRateSwapsNotQualifiedAsCashFlowHedgesRecordedAsLiability

mgm:FairValueOfInterestRateSwapsQualifiedAsCashFlowHedgesRecordedAsLiability
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
mgm:InitialAnnualRent
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
mgm:InvestmentInConsolidatedSubsidiary
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
mgm:InvestmentsInOperatingPartnership
us-gaap:ConsolidationItems

mgm:LeaseLiabilityCurrent

mgm:LoyaltyProgramObligationsCurrent

mgm:MinorityInterestOwnershipPercentageInConsolidatedSubsidiary
dei:LegalEntity
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:OutstandingChipLiabilitiesCurrent
dei:LegalEntity
mgm:PercentInterestInALessThanHundredPercentOwnedConsolidatedAffiliate
us-gaap:CapitalUnitsByClass, dei:LegalEntity
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:PlanName
mgm:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsOutstandingIntrinsicValue
us-gaap:PlanName
mgm:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:PlanName
mgm:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndStockAppreciationRightsExercisableIntrinsicValue1
us-gaap:TaxPeriod
mgm:TaxCreditCarryforwardExpirationAmount

mgm:UnpaidWagersAndOtherCurrent

us-gaap:AccountsReceivableGrossCurrent
us-gaap:ProductOrService

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:ConstructionPayableCurrent
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:DebtInstrumentCarryingAmount
us-gaap:CreditFacility
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DebtInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:Range
us-gaap:DebtInstrumentRepurchasedFaceAmount
us-gaap:Range, us-gaap:DebtInstrument
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:IncomeTaxAuthority
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsEquityMethodInvestments
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsGross
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxCreditCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesFinancingArrangements
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:DueFromAffiliateNoncurrent
us-gaap:ConsolidationItems
us-gaap:Energy, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:DueFromRelatedParties
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:DueToAffiliateNoncurrent
us-gaap:ConsolidationItems

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities

us-gaap:EquityMethodInvestmentUnderlyingEquityInNetAssets

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseRightOfUseAsset
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, dei:LegalEntity
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, dei:LegalEntity

us-gaap:IncomeTaxesReceivable

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:InsuranceSettlementsReceivableCurrent

us-gaap:InterestPayableCurrent
us-gaap:LineOfCreditFacility
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCredit
us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:StatementScenario, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacility, us-gaap:ShortTermDebtType
us-gaap:LongtermDebtType, us-gaap:CreditFacility, us-gaap:StatementScenario, us-gaap:DebtInstrument
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:StatementScenario, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:LongtermDebtType, us-gaap:CreditFacility, us-gaap:StatementScenario, us-gaap:DebtInstrument

us-gaap:LitigationReserveCurrent

us-gaap:LongTermDebtFairValue
us-gaap:Ownership, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:MinorityInterestOwnershipPercentageByParent
us-gaap:Ownership, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:BusinessAcquisition, us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority

us-gaap:OtherLongTermDebt
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:BalanceSheetLocation
us-gaap:SelfInsuranceReserveCurrent
us-gaap:DebtInstrument
us-gaap:SeniorNotes
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:StockRepurchaseProgramAuthorizedAmount1
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

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 ▁███████████████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁45555555555555555555444444444444444NA4444NA4NANA
us-gaap:CommonStockParOrStatedValuePerShare ▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.010.010.010.010.010.010.010.010.011.00.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.01NA0.010.010.010.01NA0.01NANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▁▂▃▄▅▄▄▅▆▇▇███493503513526537527531537556566565575574574NANANA564NANANA491NANANA490NANANA489NANANA488NANANA488NANANA441NANA
us-gaap:CommonStockSharesIssued ▁▂▃▄▅▄▄▅▆▇▇████▇▇▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁493503513526537527531537556566565575574574572565565564563563491491490490490490489489489489488488488488488NA488488441441NA441NANA
us-gaap:CommonStockSharesOutstanding ▁▂▃▄▅▄▄▅▆▇▇████▇▇▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁493503513526537527531537556566565575574574572565565564563563491491490490490490489489489489488488488488488NA488488441441NA441NANA
us-gaap:CommonStockSharesAuthorized ████████████████████████████████████▁▁▁▁100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000600600600600NA600NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 496NA518535537NA540554571NA580582580NA573570569NA569570575NA490513513NA489489492NA488488488NA488554488NA441NANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 495NA518532534NA535548564NA573574574NA568565565NA563551491NA490490490NA489489489NA488488488NA488488488NA441NANANANANA
us-gaap:EarningsPerShareBasic ▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▃▃▂▃▃▃▂▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▂▁▃▂▂▂1.643.94-0.080.080.05-0.060.260.210.392.430.260.370.360.040.940.840.12-1.380.120.180.35-0.7-0.040.220.22-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.257.04-0.18-0.29-0.72-2.0-0.22-1.0100000000000002-1.7-0.6
us-gaap:EarningsPerShareDiluted ▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▄▃▂▃▃▃▂▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▂▁▃▂▂▃1.643.91-0.080.080.05-0.060.260.210.382.40.260.360.360.040.930.830.12-1.380.120.170.33-0.7-0.040.210.21-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.256.22-0.18-0.29-0.72-2.0-0.22-1.0100000000000002-1.7-0.6
  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:Revenues ▄███▇▇▇▆▆▅▆▆▆▅▅▄▄▄▄▅▄▅▅▅▅▅▅▅▄▄▄▄▄▄▄▂▁▁▁▁▁▁▁▁22523185331432233176305230292858282225972830265227172460251522692209219122802385233223852485258126302513246324812352229422542323228722962233180515041475155715371457145215331494
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▄███▇▇▇▆▆▅▆▆▆▅▅▄▄▄▄▅▄▅▅▅▅▅▅▅▄▄▄▄▄▄▄▂▁▁▁▁▁▁▁▁22523185331432233176305230292858282225972830265227172460251522692209219122802385233223852485258126302513246324812352229422542323228722962233180515041475155715371457145215331494
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems us-gaap:OperatingSegments▁▇█▇▇▆▆▅▅▄▅▄▄▃▃▁▁▁▂▂▂▂▃▃▄2131305631803083296628442837272426942478270925292588236323982146208820762165226222072273237224672511NANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:Casino,mgm:LasVegasStripResorts▁▅▅▃▅▆▆▆█274327336308324339345349372NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:Casino,mgm:MGMChina▁████▇▆▅▆240650662633663611536496550NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:Casino,mgm:RegionalOperations▄███▅▄▃▂▁536648660653574549526483467NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:FoodAndBeverage,mgm:LasVegasStripResorts▁▆█▇▆▄▆▆▄288361401389365332368361339NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:Occupancy,mgm:LasVegasStripResorts▁▇███▆▆▇▇362455469469468432443451448NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mgm:LasVegasStripResorts▁▇█▇▇▆▇▇▇113314291507146614281375145414541432NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mgm:MGMChina▁████▇▆▅▆271727737706734686606561595NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mgm:RegionalOperations▃▇█▇▅▄▄▂▁725899935910803782777708666NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService mgm:EntertainmentRetailAndOther▁▇██▅▆▇▇▅▄▇▆269362387382344349370363329315368353NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:Casino▁██▇█▇▆▄▅▄▄▂105416301663159816261561146513321394128912831172NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:FoodAndBeverage▁▆█▇▆▅▆▅▄▂▆▅396520560544520488520494455413503485NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:Occupancy▁▇██▇▆▇▇▆▃▇▆433566595586574542566563539479572541NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService mgm:EntertainmentRetailAndOther▁▇██▅▇▇▅▄▄▆▅199262274269243265263243226232254243NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService mgm:ReimbursedCosts▁▅▆██▇▅▄▄▂▃▂9810610711111111010610410310010299NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Casino▁██▇█▇▆▄▄▃▂▁628917915888902876819741762704674627NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:FoodAndBeverage▂▇██▆▅▆▅▃▁▄▄339407427426400380391376353324373363NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Occupancy▁▇█▇▇▅▇▆▄▂▅▄172205211208203193206202189180192187NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▃▁▇▇▇▇▆▆▆▆▆▅▅▅▄▅▅█▅▅▅▅▅▅▅▅▅▅▅1037242311228782845274926532543249424012370218122502210183419481908342920402079205421172221224622362198221922562066NA207921542081NA2121-184513981395175625601387196423631367
us-gaap:SellingGeneralAndAdministrativeExpense ██▆▇▇▅▅▄▄▄▃▂▃▃▃▁▁574557494524525444463438417414402354388376371321308NANANANANANANANANANANANANA319309303NA304301269277292282276274290273
us-gaap:OperatingIncomeLoss ▅▇▃▃▃▃▃▃▃▃▃▃▃▃▄▄▃▁▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▃▃█▃▃▂▁▃▂▁▃12502960238371370335410363359223493501497282712769315-1197297348395266286339412330247231301-424137175192911123683169107-205-1048-11-486-963131
us-gaap:InterestExpense ▁▅▇▇▇▇▆▃▂▁▂▃▃▁▂▃▄▄▄▆▇▅▆▆▆▆▆▇█157200215215216214205181167157163174174161168180184186191203216200202203209208208214225NA275276284NA272270269273285291264220181201
us-gaap:OtherNonoperatingIncomeExpense ▁▁▇▅█████▇▆███▇▅█████████████-124-129-9-461-6-3-6-1-16-3000-4-17-490-3-4-4-3-500-1-20-4-1NA20-57NA-1-13-3106714180-234
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▇█▂▇▃▄▅▄▁▄▄▁▃▄▄▄▄▄▄▄▄▅▂▅▄▄▄▅▃2833-1826-12-2121-24-1-3-25-1211-1-401029-135-2106-12NA281NA-3NANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome15NA-1014-6NA60-13NA-1-14-7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest12NA-811-5NA50-100-1-11-5000-200014-62-100NA-6NANANANANANANANANANANANANANANA
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 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument mgm:SeniorNotesFivePointSevenFiveZeroPercentDueTwoThousandTwentyFive0.0575NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:PropertyPlantAndEquipmentByType mgm:SecuredNoteDue2024InterestRateInFifthYear,mgm:CircusCircusLasVegasAndAdjacentLandNA0.045NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:PropertyPlantAndEquipmentByType mgm:SecuredNoteDue2024InterestRateInFirstTwoYears,mgm:CircusCircusLasVegasAndAdjacentLandNA0.03NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:PropertyPlantAndEquipmentByType mgm:SecuredNoteDue2024InterestRateInFollowingTwoYears,mgm:CircusCircusLasVegasAndAdjacentLandNA0.04NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:SubsequentEventType mgm:SeniorNotesFivePointFiveZeroZeroPercentDueTwoThousandTwentySeven,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:SubsequentEventType mgm:SeniorNotesFivePointSevenFiveZeroPercentDueTwoThousandTwentyFive,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:SubsequentEventType mgm:SeniorNotesFourPointSixTwoFivePercentDueTwoThousandTwentySix,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:SubsequentEventType mgm:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyFive,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value4555555555555555555544444444444444444444
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

us-gaap:CommonStockParOrStatedValuePerShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value0.010.010.010.010.010.010.010.010.011.00.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.01
Percentage of CommonStockParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Shares Outstanding

us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value493503513526537527531537556566565575574574564491490489488488441
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value493503513526537527531537556566565575574574572565565564563563491491490490490490489489489489488488488488488488488441441441
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value493503513526537527531537556566565575574574572565565564563563491491490490490490489489489489488488488488488488488441441441
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000600600600600600
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value496518535537540554571580582580573570569569570575490513513489489492488488488488554488441
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value495518532534535548564573574574568565565563551491490490490489489489488488488488488488441
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value1.643.94-0.080.080.05-0.060.260.210.392.430.260.370.360.040.940.840.12-1.380.120.180.35-0.7-0.040.220.22-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.257.04-0.18-0.29-0.72-2.0-0.22-1.0100000000000002-1.7-0.6
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
Value1.643.91-0.080.080.05-0.060.260.210.382.40.260.360.360.040.930.830.12-1.380.120.170.33-0.7-0.040.210.21-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.256.22-0.18-0.29-0.72-2.0-0.22-1.0100000000000002-1.7-0.6
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

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
Value22523185331432233176305230292858282225972830265227172460251522692209219122802385233223852485258126302513246324812352229422542323228722962233180515041475155715371457145215331494
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 RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

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
Value22523185331432233176305230292858282225972830265227172460251522692209219122802385233223852485258126302513246324812352229422542323228722962233180515041475155715371457145215331494
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:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value225226225271283282220215214182184
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.16.87.08.59.39.37.77.68.36.57.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.16.87.08.59.39.37.77.68.36.57.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11561172114711721132996921932849763745
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.335.435.636.937.132.932.233.132.727.028.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.335.435.636.937.132.932.233.132.727.028.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value20292142207519361853196619371889174920671907
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.764.664.460.960.764.967.867.067.373.171.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.764.664.460.960.764.967.867.067.373.171.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

mgm:CorporateAndReconcilingItems



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value121128134139210208191134127119121122120120116
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.44.04.04.36.66.86.34.74.54.64.34.64.44.94.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.44.04.04.36.66.86.34.74.54.64.34.64.44.94.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:CorporateAndReconcilingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-225-226-225-203-216-216-220-216-215-183-185
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.1-6.8-7.0-6.4-7.1-7.2-7.7-7.7-8.3-6.5-7.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.1-6.8-7.0-6.4-7.1-7.2-7.7-7.7-8.3-6.5-7.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2131305631803083296628442837272426942478270925292588236323982146208820762165226222072273237224672511
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax94.696.096.095.793.493.293.795.395.595.495.795.495.396.195.494.694.594.794.994.994.795.395.595.695.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax94.696.096.095.793.493.293.795.395.595.495.795.495.396.195.494.694.594.794.994.994.795.395.595.695.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mgm:EntertainmentRetailAndOther, mgm:LasVegasStripResorts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value207285300298269271296291271
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.29.09.19.38.58.99.810.29.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.29.09.19.38.58.99.810.29.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:EntertainmentRetailAndOther mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mgm:EntertainmentRetailAndOther, mgm:MGMChina



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value366666554
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.20.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.20.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:EntertainmentRetailAndOther mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mgm:EntertainmentRetailAndOther, mgm:RegionalOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value385157514042463832
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.61.71.61.31.41.61.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.61.71.61.31.41.61.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:EntertainmentRetailAndOther mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Casino, mgm:LasVegasStripResorts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value274327336308324339345349372
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.210.310.19.610.211.111.412.213.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.210.310.19.610.211.111.412.213.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Casino mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Casino, mgm:MGMChina



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value240650662633663611536496550
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.720.420.019.620.920.017.717.419.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.720.420.019.620.920.017.717.419.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Casino mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Casino, mgm:RegionalOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value536648660653574549526483467
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.820.419.920.318.118.017.416.916.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.820.419.920.318.118.017.416.916.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Casino mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:FoodAndBeverage, mgm:LasVegasStripResorts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value288361401389365332368361339
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.811.312.112.111.510.912.212.712.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.811.312.112.111.510.912.212.712.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:FoodAndBeverage mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:FoodAndBeverage, mgm:MGMChina



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value123332303034312820
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.01.01.01.01.11.01.00.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.01.01.01.01.11.01.00.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:FoodAndBeverage mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:FoodAndBeverage, mgm:RegionalOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9512512612311711411310595
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.24.03.83.83.73.83.83.73.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.24.03.83.83.73.83.83.73.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:FoodAndBeverage mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Occupancy, mgm:LasVegasStripResorts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value362455469469468432443451448
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.114.314.214.614.814.214.615.815.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.114.314.214.614.814.214.615.815.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Occupancy mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Occupancy, mgm:MGMChina



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value153736353335323119
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.71.21.11.11.11.11.11.10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.71.21.11.11.11.11.11.10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Occupancy mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Occupancy, mgm:RegionalOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value557390817175908171
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.32.72.52.32.53.02.82.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.32.72.52.32.53.02.82.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Occupancy mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mgm:LasVegasStripResorts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value113314291507146614281375145414541432
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.344.945.545.545.045.148.050.950.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.344.945.545.545.045.148.050.950.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mgm:MGMChina



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value271727737706734686606561595
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.122.822.321.923.122.520.019.621.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.122.822.321.923.122.520.019.621.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mgm:RegionalOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value725899935910803782777708666
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.228.328.228.325.325.625.724.823.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.228.328.228.325.325.625.724.823.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

mgm:EntertainmentRetailAndOther



Period 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
Value269362387382344349370363329315368353
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.011.411.711.910.811.512.212.711.712.113.013.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.011.411.711.910.811.512.212.711.712.113.013.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:EntertainmentRetailAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:ReimbursedCosts



Period 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
Value9810610711111111010610410310010299
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.33.33.43.53.63.53.73.73.93.63.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.33.33.43.53.63.53.73.73.93.63.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:ReimbursedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Casino



Period 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
Value105416301663159816261561146513321394128912831172
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.851.250.249.651.251.148.446.649.449.645.344.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.851.250.249.651.251.148.446.649.449.645.344.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Casino100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FoodAndBeverage



Period 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
Value396520560544520488520494455413503485
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.616.316.916.916.416.017.217.316.115.917.818.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.616.316.916.916.416.017.217.316.115.917.818.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FoodAndBeverage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Occupancy



Period 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
Value433566595586574542566563539479572541
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.317.818.018.218.117.818.719.719.118.420.220.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.317.818.018.218.117.818.719.719.118.420.220.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Occupancy100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:MGMGrandLasVegas



Period End2020-02-14
Value2500
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:MGMGrandLasVegas100.0

mgm:MandalayBay



Period End2020-02-14
Value2100
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:MandalayBay100.0

Sales Revenue Net

Cost Of Goods And Services Sold

us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServicesSold

mgm:EntertainmentRetailAndOther



Period 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
Value199262274269243265263243226232254243
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.88.38.38.47.78.78.78.58.09.09.09.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:EntertainmentRetailAndOther73.772.570.970.570.776.071.367.068.873.969.069.0

mgm:ReimbursedCosts



Period 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
Value9810610711111111010610410310010299
Percentage of CostOfGoodsAndServicesSold49.340.339.341.245.941.740.443.045.543.040.340.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.33.33.43.53.63.53.73.73.93.63.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:ReimbursedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Casino



Period 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
Value628917915888902876819741762704674627
Percentage of CostOfGoodsAndServicesSold315.8349.0333.0329.1370.5329.6310.5304.7336.2302.5265.6257.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.928.827.627.628.428.727.025.927.027.123.823.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Casino59.656.355.055.655.556.155.955.754.754.652.653.5

us-gaap:FoodAndBeverage



Period 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
Value339407427426400380391376353324373363
Percentage of CostOfGoodsAndServicesSold170.6154.9155.5158.0164.3143.1148.2154.9155.8139.4147.2148.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.112.812.913.212.612.512.913.212.512.513.213.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FoodAndBeverage85.678.376.378.476.977.975.176.277.678.474.374.8

us-gaap:Occupancy



Period 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
Value172205211208203193206202189180192187
Percentage of CostOfGoodsAndServicesSold86.778.276.977.383.772.778.283.483.377.575.876.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.76.56.46.56.46.36.87.16.76.96.87.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Occupancy39.836.335.535.635.535.636.436.035.037.733.634.5

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value10372423112287828452749265325432494240123702181225022101834194819083429204020792054211722212246223621982219225620662079215420812121-184513981395175625601387196423631367
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.17.693.989.389.690.187.689.088.492.583.882.282.889.873.085.986.4156.589.587.288.188.889.487.185.087.590.190.987.992.292.791.095.0-102.292.994.6112.8166.595.2135.2154.291.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8292891401531471191061339394
Percentage of CostsAndExpenses34.03.03.14.95.65.64.74.35.63.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.82.84.45.04.94.23.85.13.33.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities36.540.939.751.654.052.254.449.162.151.151.1

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10651068105610581038944852866763671648
Percentage of CostsAndExpenses439.234.336.737.237.835.633.534.731.828.329.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.532.232.833.334.031.229.830.729.423.724.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities92.291.292.090.291.794.892.592.889.987.987.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-7032141192317901602161316411579157216611509
Percentage of CostsAndExpenses-290.068.866.862.958.360.864.663.365.570.169.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-22.164.659.756.352.553.357.456.060.558.756.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities-34.7100.092.792.486.582.184.883.689.980.479.1

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4254517749384444463636
Percentage of CostsAndExpenses17.41.71.82.71.81.51.81.81.91.51.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.61.62.41.61.31.61.61.81.31.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-244-244-242-220-94-90-115-102-114-87-95
Percentage of CostsAndExpenses-100.6-7.8-8.4-7.8-3.4-3.4-4.5-4.1-4.8-3.7-4.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.7-7.4-7.5-6.9-3.1-3.0-4.0-3.6-4.4-3.1-3.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations108.1108.1107.5108.543.542.052.247.252.947.651.5

General And Administrative Expense

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value574557494524525444463438417414402354388376371321308319309303304301269277292282276274290273
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.517.514.916.316.514.615.315.314.816.014.213.414.315.314.814.214.014.213.313.313.616.717.918.818.818.418.918.919.018.3

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value555523232722241820
Percentage of SellingGeneralAndAdministrativeExpense1.11.21.11.15.35.16.25.45.84.75.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.80.81.00.80.90.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities2.62.62.62.28.28.312.410.411.310.411.2

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1901871881881411271201041058986
Percentage of SellingGeneralAndAdministrativeExpense34.237.935.936.031.927.627.525.125.422.324.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.05.65.85.94.74.24.23.74.13.23.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities16.516.016.416.112.512.813.111.212.411.711.6

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value600542569522288323315310306310265
Percentage of SellingGeneralAndAdministrativeExpense107.8109.8108.699.464.969.872.074.474.077.275.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.916.417.716.49.510.711.011.011.811.010.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities29.625.327.427.015.616.416.316.417.515.013.9

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value424162222222
Percentage of SellingGeneralAndAdministrativeExpense0.70.60.83.10.60.50.50.60.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.50.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-244-244-243-208-11-13-27-22-24-18-20
Percentage of SellingGeneralAndAdministrativeExpense-43.8-49.4-46.5-39.7-2.7-3.0-6.2-5.4-5.8-4.7-5.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.7-7.4-7.6-6.6-0.4-0.5-1.0-0.8-0.9-0.7-0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations108.1108.1108.1102.45.56.312.310.411.210.311.1

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
Value12502960238371370335410363359223493501497282712769315-1197297348395266286339412330247231301-424137175192911123683169107-205-1048-11-486-963131
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 RevenueFromContractWithCustomerExcludingAssessedTax55.592.97.211.511.711.013.612.712.78.617.418.918.311.528.333.914.3-54.613.014.616.911.211.513.215.713.110.19.312.8-18.56.17.58.44.05.0204.011.37.3-13.2-68.2-0.8-33.5-62.88.8

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value143133136131130134100109818990
Percentage of OperatingIncomeLoss4.856.136.635.538.932.827.730.536.418.118.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.04.24.14.34.43.53.93.13.23.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities63.559.160.348.446.047.845.650.937.948.948.9

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value83988611693516866859196
Percentage of OperatingIncomeLoss2.841.423.431.427.812.619.018.638.218.519.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.63.02.73.73.11.72.42.43.33.23.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities7.28.47.69.98.25.27.57.210.011.913.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value280472209223306416366386238477475
Percentage of OperatingIncomeLoss94.730.356.360.391.2101.3100.9107.3107.096.894.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax88.02.26.57.010.013.712.813.79.216.917.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities138.23.410.111.516.521.218.920.413.723.124.9

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value279566195181196293264283100381388
Percentage of OperatingIncomeLoss94.428.052.749.058.571.572.978.945.077.377.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.82.06.15.76.49.79.310.13.913.514.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2866-132-256-282-390-485-437-487-282-547-551
Percentage of OperatingIncomeLoss-96.8-55.8-69.1-76.2-116.4-118.2-120.4-135.4-126.5-110.9-110.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.0-4.0-8.0-8.9-12.8-16.0-15.3-17.3-10.9-19.3-20.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1268.958.8113.7138.7180.4224.1198.3225.1131.1297.9297.3

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value157200215215216214205181167157163174174161168180184186191203216200202203209208208214225275276284272270269273285291264220181201
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.06.36.56.76.87.06.86.35.96.15.86.66.46.66.77.98.48.58.48.59.38.48.27.98.08.38.58.69.612.211.912.412.215.017.918.518.318.918.115.211.913.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5863636358584949494544
Percentage of InterestExpense29.429.329.629.627.228.627.229.331.327.925.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.92.02.01.91.91.71.71.91.61.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities26.127.928.323.620.520.822.422.822.924.924.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value323333252521168056
Percentage of InterestExpense16.415.515.411.711.910.59.15.4-0.43.43.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.01.01.00.80.80.70.60.3-0.00.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities2.82.92.92.22.22.21.81.0-0.10.70.8

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value465000.0221000.0209000.0208000.0122000.095000.0156000.0137000.0170000.0178000.0176000.0
Percentage of InterestExpense0.20.10.10.10.10.00.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value108118118126130125115109108112122
Percentage of InterestExpense54.055.154.958.660.960.963.765.269.068.670.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.63.74.04.34.14.03.94.24.04.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-124-129-9-461-6-3-6-1-16-3000-4-17-490-3-4-4-3-500-1-20-4-120-57-1-13-3106714180-234
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.5-4.1-0.3-1.40.1-0.2-0.1-0.2-0.1-0.6-1.1-0.0-0.0-0.2-0.7-2.2-0.0-0.1-0.2-0.2-0.1-0.2-0.0-0.0-0.1-0.1-0.0-0.2-0.10.10.0-2.5-0.1-0.7-0.30.70.40.59.70.60.1-15.7

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value2833-1826-12-2121-24-1-3-25-1211-1-401029-135-2106-12281-3
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.1-0.60.8-0.4-0.10.40.0-0.9-0.1-0.1-1.0-0.50.10.1-0.1-0.2-0.00.10.00.10.4-0.50.2-0.10.10.00.3-0.50.10.40.1-0.2

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value33-1826-12-2121-24-1-3-25
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-0.60.8-0.4-0.10.40.0-0.9-0.1-0.1-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities2.9-1.62.3-1.1-0.21.20.2-2.6-0.2-0.4-3.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value18-1014-6-160-130-1-14
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax56.156.555.955.754.254.941.655.352.854.455.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.6-0.30.5-0.2-0.00.20.0-0.5-0.0-0.1-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.9-0.50.7-0.4-0.10.30.0-0.7-0.1-0.1-0.7

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value18-1014-6-160-130-1-14
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax56.156.555.955.754.254.941.655.352.854.455.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.6-0.30.5-0.2-0.00.20.0-0.5-0.0-0.1-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3721-29132-13-1261328
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax-112.2-113.0-111.9-111.3-108.3-109.8-83.3-110.7-105.6-108.9-110.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.20.6-0.90.40.1-0.4-0.00.90.10.11.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations16.6-9.313.1-6.8-1.26.20.5-12.4-0.9-1.8-15.1

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value15-1014-660-13-1-14-7
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax55.856.555.955.754.941.655.354.455.256.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.7-0.30.5-0.20.20.0-0.5-0.1-0.5-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-31
Value12-811-550-100-1-11-5000-200014-62-100-6
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax44.243.544.144.345.158.444.747.245.644.843.252.547.040.749.634.456.948.849.149.549.348.845.046.347.049.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.6-0.20.4-0.20.20.0-0.4-0.0-0.0-0.4-0.20.00.0-0.0-0.1-0.00.00.00.10.2-0.30.1-0.00.00.0-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-31
Value15-1014-660-130-1-14-7000-200014-62-100-6
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax55.856.555.955.754.941.655.352.854.455.256.847.552.959.350.465.643.151.250.950.550.751.255.053.753.050.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.7-0.30.5-0.20.20.0-0.5-0.0-0.1-0.5-0.30.00.0-0.0-0.1-0.00.00.00.10.2-0.30.1-0.10.00.0-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value9362622-1871379819016418041291315315107516522112-14037812215640601211884515-2653-157-121-176
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.682.3-0.02.74.33.26.35.76.41.610.311.911.64.420.523.05.1-64.03.45.16.71.72.44.77.21.80.6-1.12.3-7.0-5.2-7.7

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7470716971754959324545
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest2.8-6018.181.750.172.739.530.132.879.715.514.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.12.22.22.32.51.72.11.31.61.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities33.131.231.825.425.226.622.427.515.324.724.4

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6648409320-14311206562
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest2.5-4162.546.267.821.3-7.61.96.349.322.619.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.11.51.32.90.7-0.50.10.40.82.32.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities5.74.23.58.01.9-1.50.31.22.48.68.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2915105233308191311247278123418355
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest111.2-9029.9265.6224.0194.9163.6150.9153.7301.5143.4112.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.53.27.29.76.310.38.79.94.814.813.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities143.74.911.215.910.415.812.814.77.120.218.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2575-335573821841641906253279
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest98.22891.062.653.483.597.0100.2105.116.786.988.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.8-1.01.72.32.76.15.86.70.39.010.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3008-192-313-406-268-366-300-357-142-492-428
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-114.716419.5-356.1-295.4-272.4-192.5-183.1-197.9-347.1-168.8-135.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-94.5-5.8-9.7-12.8-8.8-12.1-10.5-12.7-5.5-17.4-16.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1331.985.1138.7199.9123.8169.1136.3165.566.2267.8230.9

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest



Period End2019-12-312019-09-302018-12-312018-09-30
Value206565171
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.90.20.25.7

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-312018-09-30
Value72685155
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest3.51123.1901.732.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.11.71.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities32.330.318.319.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-312018-09-30
Value74613911
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest3.61004.1677.46.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.41.81.30.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities6.55.23.41.2

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-312018-09-30
Value2915105210328
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest141.11733.83663.0191.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.53.26.910.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities143.74.911.416.7

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-312018-09-30
Value2011-37-23142
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest97.4-608.3-405.083.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.2-1.1-0.84.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-312018-09-30
Value-3008-192-272-367
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest-145.6-3152.6-4737.1-214.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-94.5-5.8-8.9-12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1331.985.1125.9169.4

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-314-337-239-283-232-237-220-198-178-182-202-185-181-174-196-246-203-206-219-225-238-225-225-218-224-284-232-258-248-294-297-368-298-311-314-292-305-314-145-232-194-441
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-13.9-10.6-7.2-8.8-7.3-7.8-7.3-7.0-6.3-7.0-7.1-7.0-6.7-7.1-7.8-10.8-9.2-9.4-9.6-9.5-10.2-9.5-9.1-8.5-8.5-11.3-9.4-10.4-10.6-13.1-12.8-16.1-13.4-17.2-20.9-19.8-19.6-20.4-10.0-16.0-12.7-29.5

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value262556-71171921923-85-1384115746237-4482169-16-3-5632810-52-35-8330-2-5127-79-78-54-45-192-479-60-285-407-97
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.617.5-0.20.42.33.00.60.8-3.0-53.34.12.82.31.5-1.80.41.03.2-0.7-0.2-2.413.80.4-2.0-0.10.2-0.30.21.3-0.1-2.21.2-3.6-4.3-3.6-3.1-12.4-31.2-4.1-19.7-26.6-6.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11423511111
Percentage of IncomeTaxExpenseBenefit0.3-27.234.33.73.327.65.3-1.4-0.11.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.20.00.00.00.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities0.80.91.81.01.11.90.60.60.50.80.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-8-12-326-18-26-18-53183
Percentage of IncomeTaxExpenseBenefit-1.6171.9-33.637.2-19.6-136.7-77.062.4-0.17.14.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-0.4-0.10.8-0.6-0.9-0.6-1.90.10.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities-0.8-1.1-0.32.3-1.6-2.6-2.0-5.70.21.10.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.00.03000.05000.00.00.00.00.00.00.00.0
Percentage of IncomeTaxExpenseBenefit0.0-0.00.00.00.00.00.0-0.0-0.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value563311421054140-33-138010569
Percentage of IncomeTaxExpenseBenefit101.3-44.799.359.1114.8220.0171.739.099.791.393.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.70.10.41.33.51.41.4-1.2-53.13.72.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value00002-200000
Percentage of IncomeTaxExpenseBenefit0.0-0.00.00.02.3-11.00.0-0.0-0.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.1-0.10.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations-0.0-0.0-0.0-0.0-1.01.0-0.0-0.0-0.0-0.0-0.0

us-gaap:IncomeTaxAuthority

country:MO



Period End2020-03-312019-09-302019-06-302019-03-31
Value-610010
Percentage of IncomeTaxExpenseBenefit-2.3-137.40.014.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.30.00.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:MO0.00.00.00.0

us-gaap:IncomeTaxAuthority, us-gaap:RelatedPartyTransactionsByRelatedParty

country:MO, mgm:MGPBREITVenture



Period End2020-03-31
Value349
Percentage of IncomeTaxExpenseBenefit133.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:MO mgm:MGPBREITVenture0.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value2101113-6-12-1322317138247504-1991742314300311130-3620122
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.30.30.4-0.2-0.10.1-0.50.10.90.65.20.10.20.32.20.2-0.90.40.70.20.11.30.20.10.0-0.00.20.10.10.11.9-23.60.10.11.5

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value674206567666517114026614251762412536956151491-147394126212-287501731914023-3022-1188-154-70-203-19-1063450-89-139-317-883-96
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 RevenueFromContractWithCustomerExcludingAssessedTax29.964.90.22.42.10.25.74.99.454.96.29.19.32.822.322.74.1-67.24.25.39.1-12.12.06.77.31.61.0-1.21.0-51.8-6.9-3.0-8.9-0.8-4.8191.1-6.0-9.4-20.4-57.5-6.6

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7268676668694858314343
Percentage of ProfitLoss3.51123.189.0100.31190.140.834.221.82.224.818.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.12.12.12.22.31.72.11.21.51.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities32.330.330.024.524.124.821.827.014.823.923.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7461446639112164185759
Percentage of ProfitLoss3.61004.158.5101.0677.46.715.224.31.332.724.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.41.81.42.11.30.40.72.30.72.02.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities6.55.23.95.73.41.22.36.92.27.68.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2915105233308191311247278123418355
Percentage of ProfitLoss141.11733.8306.5466.13332.2181.8176.4104.48.7236.9147.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.53.27.29.76.310.38.79.94.814.813.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities143.74.911.215.910.415.812.814.77.120.218.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2011-374331-231421232231387148209
Percentage of ProfitLoss97.4-608.357.047.3-405.083.488.183.997.384.186.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.2-1.11.31.0-0.84.74.37.953.45.27.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3008-192-313-406-270-364-300-357-142-492-428
Percentage of ProfitLoss-145.6-3152.6-411.0-614.7-4694.7-212.6-214.0-134.4-10.0-278.9-177.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-94.5-5.8-9.7-12.8-8.9-12.0-10.5-12.7-5.5-17.4-16.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1331.985.1138.7199.9124.8168.2136.3165.566.2267.8230.9

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value7772045-574115-3815212821913991481941992653647364-7816697170-337-27108107-37-31-890-179-141-216-1253438-87-316
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.564.2-1.71.30.5-1.25.04.57.853.95.27.37.31.121.320.92.9-35.72.94.17.3-14.2-1.14.24.1-1.5-1.3-3.60.0-8.0-6.1-9.5-5.6190.4-5.8-20.3

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6633243532533954323330
Percentage of ComprehensiveIncomeNetOfTax3.2-57.059.7225.0-86.335.430.924.72.322.915.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.11.00.81.11.11.81.41.91.21.21.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities29.414.611.013.111.619.117.925.215.118.616.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value653048442791824-53925
Percentage of ComprehensiveIncomeNetOfTax3.2-51.9116.7285.0-71.36.014.411.0-0.426.712.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.10.91.51.40.90.30.60.9-0.21.40.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities5.62.64.23.82.40.92.02.6-0.65.23.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value293395248301190318248264122416341
Percentage of ComprehensiveIncomeNetOfTax143.4-164.6597.91909.9-500.0208.9194.0120.68.8280.9175.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.12.97.79.56.210.58.79.44.714.712.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities144.64.412.015.610.316.212.814.07.020.117.9

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2045-574115-381521282191393147193
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.099.599.599.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.2-1.71.30.5-1.25.04.57.853.75.27.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3065-158-321-381-250-381-306-343-149-490-396
Percentage of ComprehensiveIncomeNetOfTax-149.8273.5-774.3-2419.9657.7-250.3-239.2-156.3-10.7-330.5-204.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-96.2-4.8-10.0-12.0-8.2-12.6-10.7-12.2-5.8-17.3-15.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1357.170.1142.4187.8115.7175.9138.9158.769.6266.7214.1

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-15780283424213519363426184046263922-692292944596371827955659277914157
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.02.50.91.10.80.71.20.71.31.30.90.71.51.91.11.71.0-31.61.31.21.92.52.62.83.13.22.32.60.41.23.40.60.70.4

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value361612151220142012119
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest46.256.335.161.857.058.877.455.435.643.452.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.50.40.50.40.70.50.70.50.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities16.47.25.45.64.47.46.79.45.76.35.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value431222991441621148
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest53.843.764.938.243.041.222.644.664.456.648.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.40.70.30.30.50.20.60.80.50.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities3.71.12.00.80.81.50.51.72.62.01.2

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value6192126-297640-1618714725614341742122397356251386-147496127214-278361791904224-2410-151-62-201-1103445-87-316
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 RevenueFromContractWithCustomerExcludingAssessedTax27.566.7-0.92.41.3-0.56.25.19.155.26.28.08.83.022.422.63.9-67.34.25.39.2-11.71.57.07.21.71.0-1.00.4-6.7-2.7-8.8-4.9190.8-5.8-20.3

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10349365045745474444539
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest4.9-169.948.5125.5-276.939.836.929.13.126.018.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.21.51.11.61.52.51.92.61.71.61.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities45.721.816.418.716.026.524.734.520.724.921.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10842705436232240165434
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest5.1-147.293.1134.5-223.312.615.515.81.231.316.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.41.32.21.71.20.80.81.40.61.91.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities9.43.66.24.63.22.42.54.32.07.24.6

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value293395248301190318248264122416341
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest138.0-328.7325.5745.7-1164.8169.6168.7103.48.6238.3160.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.12.97.79.56.210.58.79.44.714.712.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities144.64.412.015.610.316.212.814.07.020.117.9

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2045-574115-381521282191393147193
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest96.2199.754.439.0232.981.287.085.897.284.490.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.2-1.71.30.5-1.25.04.57.853.75.27.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3065-158-321-381-250-381-306-343-149-490-396
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest-144.2546.1-421.5-944.81532.0-203.2-208.1-134.1-10.5-280.4-186.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-96.2-4.8-10.0-12.0-8.2-12.6-10.7-12.2-5.8-17.3-15.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1357.170.1142.4187.8115.7175.9138.9158.769.6266.7214.1

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value8062011-374331-2314212322313931492102062453547466-7816697169-342-20105108-56-31-926-181-145-217-1233441-89-139-317-883-96-433-750-212
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.863.2-1.11.31.0-0.84.74.37.953.75.37.97.61.021.320.93.0-35.72.94.17.3-14.3-0.84.14.1-2.3-1.3-3.70.3-8.0-6.3-9.5-5.5190.6-6.0-9.4-20.4-57.5-6.6-29.9-48.9-14.2

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4646454649503442233233
Percentage of NetIncomeLoss2.3-124.0105.8148.3-214.135.328.218.91.721.915.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.41.41.51.61.71.21.50.91.21.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities20.820.420.317.117.617.915.819.610.717.918.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value514134532821737-44139
Percentage of NetIncomeLoss2.6-112.879.9171.7-122.31.714.416.8-0.327.718.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.61.31.11.70.90.10.61.3-0.21.51.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities4.43.63.04.62.50.21.94.0-0.55.45.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2910104232306191311247278123418355
Percentage of NetIncomeLoss144.7-281.4534.5980.7-822.8218.1200.1124.48.9280.5168.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.43.27.29.76.310.38.79.94.814.813.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities143.44.911.215.910.415.812.814.77.120.218.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2011-374331-231421232231387148209
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.099.599.599.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.2-1.11.31.0-0.84.74.37.953.45.27.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3008-192-312-407-270-364-300-357-142-492-428
Percentage of NetIncomeLoss-149.6518.2-720.2-1300.71159.2-255.1-242.8-160.2-10.2-330.1-203.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-94.5-5.8-9.7-12.8-8.9-12.0-10.5-12.7-5.5-17.4-16.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1331.985.1138.5200.1124.8168.2136.3165.566.2267.8230.9

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value8142014-404427-2913811721813751492102062453547466-7816697169-38-31-926-1223-181-145-217-113-1233441-89
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.263.3-1.21.40.9-1.04.64.17.853.05.37.97.61.021.320.93.0-35.72.94.17.3-1.5-1.3-3.70.3-53.3-8.0-6.3-9.5-4.9-5.5190.6-6.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312013-09-302012-09-30
Value8142014-404427-2913811721813751492102062453547466-31-181
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.263.3-1.21.40.9-1.04.64.17.752.95.37.97.61.021.320.93.0-1.3-8.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-13254433234292816423127314645254024-6922829425470688379556216267513178
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.91.71.31.01.11.00.90.61.51.21.01.21.71.81.01.81.1-31.61.21.21.82.32.82.63.23.22.32.50.71.23.20.60.80.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value252221191819131581110
Percentage of NetIncomeLossAttributableToNoncontrollingInterest47.752.166.757.264.068.379.036.927.640.334.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.70.70.60.60.60.50.60.30.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities11.510.09.77.46.66.96.07.34.16.05.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2319913109327221620
Percentage of NetIncomeLossAttributableToNoncontrollingInterest43.544.830.237.536.031.721.063.172.459.765.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.60.30.40.30.30.11.00.90.60.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities2.01.70.91.10.90.90.42.92.72.12.7

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value41110000000
Percentage of NetIncomeLossAttributableToNoncontrollingInterest8.83.14.34.10.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.20.10.10.10.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.00.0-407000.0407000.00.00.00.00.00.00.00.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest0.00.0-1.21.20.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations-0.0-0.00.2-0.2-0.0-0.0-0.0-0.0-0.0-0.0-0.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value39118338763116830813311463021029973289772929829159291012854228303281732770526549254972521526680271492679826702254482557225350261102565825722260572628427831272632739127766278531876018961191361998722518
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value119001190011900119001230011000110001030010300104001010094009400950095008200
Percentage of Assets30.435.138.238.639.536.436.735.535.235.734.732.933.233.734.330.9
Percentage of Assets30.435.138.238.639.536.436.735.535.235.734.732.933.233.734.330.9
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1191011929119121232610951110241027010351
Percentage of Assets35.238.338.739.636.236.835.435.5
Percentage of Assets35.238.338.739.636.236.835.435.5
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1314213233133921356113158133611301613149
Percentage of Assets38.842.543.543.543.644.644.945.1
Percentage of Assets38.842.543.543.543.644.644.945.1
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3927133038332523244330310300272973529305
Percentage of Assets115.9106.0107.9104.2100.3100.2102.6100.5
Percentage of Assets115.9106.0107.9104.2100.3100.2102.6100.5
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2819024215235342339422791223002185321168
Percentage of Assets83.277.776.475.175.474.475.472.6
Percentage of Assets83.277.776.475.175.474.475.472.6
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-58639-51248-51278-50579-47001-46740-45897-44814
Percentage of Assets-173.1-164.4-166.4-162.4-155.6-155.9-158.4-153.7
Percentage of Assets-173.1-164.4-166.4-162.4-155.6-155.9-158.4-153.7
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value21108205421975819829196381913318050178191743218717182541810618149177811701517626174441743517967191451907417549176301752718234178311786418178181681856517850178991788417911
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.365.964.163.765.063.862.360.859.864.364.064.064.464.264.169.169.265.366.271.471.469.068.969.169.869.569.569.869.166.765.565.364.464.3

dei:LegalEntity

mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value500055005500560051005100430043004300430039003900390039003200
Percentage of Liabilities23.726.827.828.226.026.723.824.124.723.021.421.521.521.918.8
Percentage of Assets14.817.617.818.016.917.014.814.714.714.813.713.813.814.112.1
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany42.046.246.245.546.446.441.741.741.342.641.541.541.141.139.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value50125545552656095105510942954283
Percentage of Liabilities23.727.028.028.326.026.723.824.6
Percentage of Assets14.817.817.918.016.917.014.814.7
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities42.146.546.445.546.646.341.841.4

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value56105811593561106280651363326619
Percentage of Liabilities26.628.330.030.832.034.035.138.0
Percentage of Assets16.618.619.319.620.821.721.922.7
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities42.743.944.345.147.748.748.750.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value147531105411213105428829870586618716
Percentage of Liabilities69.953.856.853.245.045.548.050.0
Percentage of Assets43.635.536.433.829.229.029.929.9
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities37.633.533.732.529.129.029.129.7

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2046318155170131660716278155271500613591
Percentage of Liabilities96.988.486.183.882.981.283.178.0
Percentage of Assets60.458.255.253.353.951.851.846.6
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities72.675.072.371.071.469.668.764.2

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-24731-20024-19930-19040-16856-16721-16246-15741
Percentage of Liabilities-117.2-97.5-100.9-96.0-85.8-87.4-90.0-90.3
Percentage of Assets-73.0-64.2-64.7-61.1-55.8-55.8-56.1-54.0
Percentage of Assets srt:ConsolidationEliminations42.239.138.937.635.935.835.435.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value39118338763116830813311463021029973289772929829159291012854228303281732770526549254972521526680271492679826702254482557225350261102565825722260572628427831272632739127766278531876018961191361998722518
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1191011929119121232610951110241027010351
Percentage of LiabilitiesAndStockholdersEquity35.238.338.739.636.236.835.435.5
Percentage of Assets35.238.338.739.636.236.835.435.5
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1314213233133921356113158133611301613149
Percentage of LiabilitiesAndStockholdersEquity38.842.543.543.543.644.644.945.1
Percentage of Assets38.842.543.543.543.644.644.945.1
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3927133038332523244330310300272973529305
Percentage of LiabilitiesAndStockholdersEquity115.9106.0107.9104.2100.3100.2102.6100.5
Percentage of Assets115.9106.0107.9104.2100.3100.2102.6100.5
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2819024215235342339422791223002185321168
Percentage of LiabilitiesAndStockholdersEquity83.277.776.475.175.474.475.472.6
Percentage of Assets83.277.776.475.175.474.475.472.6
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-58639-51248-51278-50579-47001-46740-45897-44814
Percentage of LiabilitiesAndStockholdersEquity-173.1-164.4-166.4-162.4-155.6-155.9-158.4-153.7
Percentage of Assets-173.1-164.4-166.4-162.4-155.6-155.9-158.4-153.7
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value817377276060652067866512677368477370761263086511637662206190553251995119590158284273409044204457434342314262428943724365555357255878608662482919299825402849387039746060
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.922.819.421.221.821.622.623.625.226.121.722.822.522.122.320.820.420.322.121.515.915.317.417.417.116.216.616.716.816.620.021.021.521.922.415.615.813.314.317.20.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value43834309435346794279433043744443
Percentage of StockholdersEquity56.771.166.869.065.763.963.958.4
Percentage of Assets12.913.814.115.014.214.415.115.2
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities36.836.136.538.039.139.342.642.9

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value50114931495649594383436742034040
Percentage of StockholdersEquity64.881.476.073.167.364.561.453.1
Percentage of Assets14.815.816.115.914.514.614.513.9
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities38.137.337.036.633.332.732.330.7

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2451321982220372189921481213212107320589
Percentage of StockholdersEquity317.2362.7338.0322.7329.9314.8307.8270.5
Percentage of Assets72.470.571.570.371.171.172.770.6
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities62.466.566.367.570.971.070.970.3

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value77276060652067866512677368477577
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.099.5
Percentage of Assets22.819.421.221.821.622.623.626.0
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities27.425.027.729.028.630.431.335.8

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-33907-31223-31347-31538-30144-30019-29651-29073
Percentage of StockholdersEquity-438.8-515.2-480.8-464.7-462.9-443.2-433.0-381.9
Percentage of Assets-100.1-100.2-101.7-101.3-99.8-100.2-102.3-99.7
Percentage of Assets srt:ConsolidationEliminations57.860.961.162.464.164.264.664.9

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value7597400728802040220725262208208323922374279424852172222922143193240124082582326729563027199121661970271922842210243925073347267725932812272113661455128817913053
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.411.89.26.67.18.47.47.28.28.19.68.77.77.98.012.09.49.69.712.011.011.37.88.57.810.48.98.69.49.512.09.89.510.19.87.37.76.79.013.6

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value21616665967865294266
Percentage of AssetsCurrent5.45.83.24.43.13.014.211.2
Percentage of Assets0.60.50.20.30.30.21.00.9
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities1.81.40.50.80.70.62.92.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value79082778783197210657651022
Percentage of AssetsCurrent19.728.738.637.738.548.236.743.1
Percentage of Assets2.32.72.62.73.23.62.63.5
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities6.06.35.96.17.48.05.97.8

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1166112311331191117810129451015
Percentage of AssetsCurrent29.139.055.654.046.645.945.442.8
Percentage of Assets3.43.63.73.83.93.43.33.5
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities3.03.43.43.73.93.43.23.5

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value18477747097304708178
Percentage of AssetsCurrent46.126.93.54.412.13.23.93.3
Percentage of Assets5.52.50.20.31.00.20.30.3
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities6.63.20.30.41.30.30.40.4

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-12-11-17-9-7-5-3-7
Percentage of AssetsCurrent-0.3-0.4-0.8-0.4-0.3-0.3-0.2-0.3
Percentage of Assets-0.0-0.0-0.1-0.0-0.0-0.0-0.0-0.0
Percentage of Assets srt:ConsolidationEliminations0.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312013-01-092012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value60162329123311601223152613021272152514991986175713951446144625031664167018072342219517131313136511141803137512781480154315432443173116341865181592143149855210134402056896411295416
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.46.94.03.83.95.14.34.45.25.16.86.24.95.15.29.46.56.66.88.68.26.45.25.34.46.95.45.05.70.05.98.86.46.06.76.50.02.32.62.95.10.09.10.00.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value454612550562602657546497505540515469493542492443452480473488
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.81.81.81.92.21.81.71.71.91.81.61.71.91.81.71.81.91.81.9

Receivables Net Current

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value10610210410611111010410910710210110310097979797104100106103104991021011079810110510710711311011210495969396101
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.40.40.30.40.40.40.30.40.40.30.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.5

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value240200233188251203234180212189191148183142177137177137187136188151144224261238272248258232243231270251259252
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.70.60.80.70.80.60.70.60.70.50.60.50.60.50.70.50.70.50.70.60.60.91.00.91.11.01.00.90.90.81.00.90.91.3

Noncurrent Assets

us-gaap:NoncurrentAssets



Period End2019-12-312018-12-312017-12-31
Value285892649525319
Percentage of NoncurrentAssets100.0100.0100.0
Percentage of Assets84.487.786.8

us-gaap:StatementGeographical

country:US



Period End2019-12-312018-12-312017-12-31
Value205821822816863
Percentage of NoncurrentAssets72.068.866.6
Percentage of Assets60.860.357.8
Percentage of Assets country:US0.00.00.0

us-gaap:NonUs



Period End2019-12-312018-12-312017-12-31
Value800782668456
Percentage of NoncurrentAssets28.031.233.4
Percentage of Assets23.627.429.0
Percentage of Assets us-gaap:NonUs0.00.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value26774297472788525993223112096620220199072020319385
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets79.098.595.692.388.578.577.475.772.8102.2

us-gaap:PropertyPlantAndEquipmentByType

mgm:FurnitureFixturesAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5924606451574863427441784040399539263768
Percentage of PropertyPlantAndEquipmentGross22.120.418.518.719.219.920.020.119.419.4
Percentage of Assets17.520.117.717.317.015.615.515.214.119.9
Percentage of Assets mgm:FurnitureFixturesAndEquipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value20932139502628211199943714012272
Percentage of PropertyPlantAndEquipmentGross0.81.114.210.19.54.82.20.70.60.4
Percentage of Assets0.61.113.59.38.43.71.70.50.40.4
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.0

us-gaap:Land



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5348692365316530649564756477649970327039
Percentage of PropertyPlantAndEquipmentGross20.023.323.425.129.130.932.032.634.836.3
Percentage of Assets15.822.922.423.225.824.224.824.725.337.1
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.0

us-gaap:LandBuildingsAndImprovements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value15291164371224511969942993139264927291228504
Percentage of PropertyPlantAndEquipmentGross57.155.343.946.142.344.445.846.645.243.9
Percentage of Assets45.154.442.042.537.434.935.535.332.944.9
Percentage of Assets us-gaap:LandBuildingsAndImprovements0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value8581901782507568693965256165571353374831
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.329.828.326.927.524.423.621.719.225.5

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value15172182852060321054211962072920733198631971119635191341889618619184251794816102156921537115014147911456114441142531411314034140551396914042141171419414765147831478614866148681442614554146971481415069
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.854.066.168.368.168.669.268.567.367.365.866.265.865.464.860.761.561.056.354.554.354.156.055.255.453.854.454.654.254.053.154.254.053.553.476.976.876.874.166.9

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value108271089410975110731052610592988010021
Percentage of PropertyPlantAndEquipmentNet59.252.952.152.250.851.149.751.0
Percentage of Assets32.035.035.635.634.835.334.134.4
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities90.991.392.189.896.196.196.296.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value44974524466047236392643663346125
Percentage of PropertyPlantAndEquipmentNet24.622.022.122.330.831.031.931.2
Percentage of Assets13.314.515.115.221.221.521.921.0
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities34.234.234.834.848.648.248.746.6

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value297251975429541013564135181353913521
Percentage of PropertyPlantAndEquipmentNet16.325.225.825.565.465.268.268.9
Percentage of Assets8.816.717.617.444.945.146.746.4
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities7.615.716.316.744.845.045.546.1

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-11-11-11-10-9753-9814-9891-10033
Percentage of PropertyPlantAndEquipmentNet-0.1-0.1-0.1-0.1-47.1-47.3-49.8-51.1
Percentage of Assets-0.0-0.0-0.0-0.0-32.3-32.7-34.1-34.4
Percentage of Assets srt:ConsolidationEliminations0.00.00.00.020.821.021.622.4

us-gaap:PropertyPlantAndEquipmentByType

mgm:CircusCircusLasVegasAndAdjacentLand



Period End2019-12-31
Value785
Percentage of PropertyPlantAndEquipmentNet4.3
Percentage of Assets2.3
Percentage of Assets mgm:CircusCircusLasVegasAndAdjacentLand0.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value15968227587467307326668821050103410079801252122011961364147814911536149116611559155514201416137414161408143514441488149815891635165919411923211521183611
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.12.42.42.42.32.42.23.03.63.53.53.44.44.34.35.15.85.95.85.56.25.86.15.65.65.35.55.55.55.55.35.55.85.96.010.410.111.110.616.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1421263129455
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures1.82.93.64.24.00.70.60.5
Percentage of Assets0.00.10.10.10.10.00.00.0
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities0.10.20.20.20.20.00.00.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value7827126956746786368521002
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures95.293.893.192.392.695.596.697.0
Percentage of Assets2.32.32.32.22.22.12.93.4
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities2.02.22.12.12.22.12.93.4

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterHoldingsLLCAsInvestee



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value567568553528575589573663827809793766103810071136
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures35.569.273.070.878.880.586.175.278.878.278.778.182.982.576.2
Percentage of Assets1.41.71.81.71.82.01.92.32.82.82.72.73.73.64.5
Percentage of Assets mgm:CityCenterHoldingsLLCAsInvestee0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mgm:MGPBREITVenture



Period End2020-03-312019-12-31
Value8030
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures50.30.0
Percentage of Assets2.10.0
Percentage of Assets mgm:MGPBREITVenture0.00.0

mgm:OtherUnconsolidatedAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value22525320514480691920222414141297
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures14.230.827.019.311.09.53.02.42.12.31.41.41.00.80.5
Percentage of Assets0.60.70.70.50.30.20.10.10.10.10.00.00.00.00.0
Percentage of Assets mgm:OtherUnconsolidatedAffiliates0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value209120842076208020011821182218011800180618071807181418171815142914291430289828982898289728932898289628972900290028982902290129002897289629058686868686
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.36.26.76.86.46.06.16.26.16.26.26.36.46.46.65.45.65.710.910.710.810.811.411.311.411.111.311.311.111.010.410.610.610.410.40.50.50.50.40.4

us-gaap:StatementBusinessSegments

mgm:LasVegasStripResorts



Period End2019-12-312018-12-312017-12-312016-12-31
Value30707070
Percentage of Goodwill1.53.93.93.9
Percentage of Assets0.10.20.20.3
Percentage of Assets mgm:LasVegasStripResorts0.00.00.00.0

mgm:MGMChina



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value135213451348135913592826
Percentage of Goodwill64.973.974.774.895.097.6
Percentage of Assets4.04.54.64.85.410.6
Percentage of Assets mgm:MGMChina0.00.00.00.00.00.0

mgm:RegionalOperations



Period End2019-12-312018-12-312017-12-312016-12-31
Value701386386386
Percentage of Goodwill33.721.221.421.3
Percentage of Assets2.11.31.31.4
Percentage of Assets mgm:RegionalOperations0.00.00.00.0

us-gaap:CorporateAndOther



Period End2019-12-312018-12-312017-12-31
Value0170
Percentage of Goodwill0.01.00.0
Percentage of Assets0.00.10.0
Percentage of Assets us-gaap:CorporateAndOther0.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value37953826386639224046394439913776381938773924397240334087413740724116416442124256430943644331439644514511454846094666473748134889496550485120342342342343344
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.711.312.412.713.013.113.313.013.013.313.513.914.314.514.915.316.116.515.815.716.116.317.017.217.617.317.717.917.918.017.317.918.118.218.41.81.81.81.71.5

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302010-12-31
Value31483306346736773837403441814405471547879
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.310.911.913.115.215.116.016.817.017.20.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerLists



Period End2019-12-312018-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-30
Value4023312275396109
Percentage of FiniteLivedIntangibleAssetsNet1.30.70.10.30.71.22.02.3
Percentage of Assets0.10.10.00.00.10.20.30.4
Percentage of Assets us-gaap:CustomerLists0.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302010-12-31
Value102105109111112112287889
Percentage of FiniteLivedIntangibleAssetsNet3.33.23.13.02.92.80.70.20.20.2100.0
Percentage of Assets0.30.30.40.40.40.40.10.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass, dei:LegalEntity

mgm:GamingSubconcession, mgm:MGMGrandParadise



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value30043126329834893657
Percentage of FiniteLivedIntangibleAssetsNet95.494.695.194.995.3
Percentage of Assets8.910.311.312.414.5
Percentage of Assets mgm:GamingSubconcession mgm:MGMGrandParadise0.00.00.00.00.0

mgm:LandConcession, mgm:MGMMacau



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value051566065
Percentage of FiniteLivedIntangibleAssetsNet0.01.61.61.71.7
Percentage of Assets0.00.20.20.20.3
Percentage of Assets mgm:LandConcession mgm:MGMMacau0.00.00.00.00.0

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value438456331304322455551570522430433400410393393386377347435445411412423576581551539551500497515514557506577596598605832352
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.31.11.01.01.51.82.01.81.51.51.41.51.41.41.51.51.41.61.61.51.51.72.32.32.12.12.11.91.91.91.92.01.82.13.23.23.24.21.6

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2626319132932786281229482977306435863092273526792124229321301917208822371952279018953407336925602159221521612098187019252025192918921744201511721246131811942383
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.79.410.69.09.09.89.910.612.210.69.49.47.58.17.77.28.28.97.310.37.112.813.210.08.58.58.48.27.27.37.37.16.96.37.26.26.66.96.010.6

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value197181191215189188149144
Percentage of LiabilitiesCurrent6.25.56.97.76.46.34.94.7
Percentage of Assets0.60.60.60.70.60.60.50.5
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities1.71.51.61.81.71.71.51.4

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value845907106510711224139815681609
Percentage of LiabilitiesCurrent26.527.638.238.141.547.051.252.0
Percentage of Assets2.52.93.53.44.14.75.45.5
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities6.46.98.07.99.310.512.112.2

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16011614169216511617148014251445
Percentage of LiabilitiesCurrent50.249.060.858.754.949.746.546.7
Percentage of Assets4.75.25.55.35.44.94.95.0
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities4.14.95.15.15.34.94.84.9

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value842879122141154139142153
Percentage of LiabilitiesCurrent26.426.74.45.05.24.74.65.0
Percentage of Assets2.52.80.40.50.50.50.50.5
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities3.03.60.50.60.70.60.70.7

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-295-289-286-267-237-228-220-213
Percentage of LiabilitiesCurrent-9.3-8.8-10.3-9.5-8.0-7.7-7.2-6.9
Percentage of Assets-0.9-0.9-0.9-0.9-0.8-0.8-0.8-0.7
Percentage of Assets srt:ConsolidationEliminations0.50.60.60.50.50.50.50.5

Long Term Debt Current

us-gaap:LongTermDebtCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-03-312015-12-312015-06-302014-12-312010-12-312010-09-302010-06-302009-12-31
Value0002430053915846647208024232887512450001079
Percentage of LongTermDebtCurrent0.00.00.0100.0100.00.00.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.00.00.00.0100.0
Percentage of Assets0.00.00.00.00.10.00.01.80.51.61.70.00.00.01.01.33.24.70.00.00.04.8

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value202235253277336302301268253255242206204250232161183182168174187164266253220241202229178199201171163170158138167153117173
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.70.80.91.11.01.00.90.90.90.80.70.70.90.80.60.70.70.60.60.70.61.01.00.90.90.80.90.70.80.70.60.60.60.60.70.90.80.60.8

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value227260178215147512621233131113621262132715741709176416831770177216671483151715741364141313621261867
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.90.60.85.34.84.85.25.14.75.05.96.76.96.66.86.96.55.75.85.75.05.24.94.54.6

Accrued Income Taxes Current

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value153820242000214020862151216122372233206816611599151515941311795867942856923
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.96.06.46.96.77.17.27.77.67.15.75.65.45.75.24.24.64.94.34.1

Dividends Payable Current

us-gaap:DividendsPayableCurrent



Period End2019-12-312018-12-312017-12-312016-12-31
Value53312922
Percentage of DividendsPayableCurrent100.0100.0100.0100.0
Percentage of Assets0.20.10.10.1

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value117431116814943146611473315131146631351313282129091349313197130991298712786123641292912696128211337014551141591291512923129301344713034131111369013589138251336613359134701345012047
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.033.047.947.647.350.148.946.645.344.346.446.246.346.146.246.650.750.448.149.254.353.050.850.551.051.550.851.052.551.749.749.048.848.548.363.5

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value11743111681494314661147301508814663135131274212751130261272513099129791278612364126861236812821124951455112913117231260612930134471303413111136901358913825132251335913470130991208112047126231304612976
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.033.047.947.647.349.948.946.643.543.744.844.646.346.146.246.649.849.148.146.054.348.446.149.351.051.550.851.052.551.749.748.548.848.547.064.463.566.065.357.6

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value43074847485249394666468439233934
Percentage of LongTermDebtNoncurrent38.632.433.133.530.931.929.030.9
Percentage of Assets12.715.615.715.915.415.613.513.5
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities36.240.640.740.142.642.538.238.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value21472254217022622365244520562131
Percentage of LongTermDebtNoncurrent19.215.114.815.415.716.715.216.7
Percentage of Assets6.37.27.07.37.88.27.17.3
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities16.317.016.216.718.018.315.816.2

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value00000002
Percentage of LongTermDebtNoncurrent0.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value47137841763875288055753275326682
Percentage of LongTermDebtNoncurrent42.252.552.151.153.451.455.752.4
Percentage of Assets13.925.224.824.226.725.126.022.9
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities16.732.432.532.235.333.834.531.6

Deferred Tax Liabilities Noncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2388210615361552156613421241122612061304266825602541255125432591268726802496252525472621233923562305243024782505247624732527251324712502260323712469240026533031
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.16.24.95.05.04.44.14.24.14.59.29.09.09.19.29.810.510.69.49.39.59.89.29.29.19.39.79.79.59.49.19.29.09.09.312.613.012.513.313.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2929293433312828
Percentage of DeferredTaxLiabilitiesNoncurrent1.41.91.92.22.52.52.32.2
Percentage of Assets0.10.10.10.10.10.10.10.1
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities0.30.20.20.30.30.30.30.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value240249263266240259285360
Percentage of DeferredTaxLiabilitiesNoncurrent11.416.217.017.017.920.923.327.6
Percentage of Assets0.70.80.90.90.80.91.01.2
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities1.81.92.02.01.81.92.22.7

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value01251251450000
Percentage of DeferredTaxLiabilitiesNoncurrent0.08.18.19.30.00.00.00.0
Percentage of Assets0.00.40.40.50.00.00.00.0
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.40.40.40.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value18651161116311501097981940934
Percentage of DeferredTaxLiabilitiesNoncurrent88.675.675.073.481.879.176.771.7
Percentage of Assets5.53.73.83.73.63.33.23.2
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities6.64.84.94.94.84.44.34.4

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-29-29-29-29-29-31-28-28
Percentage of DeferredTaxLiabilitiesNoncurrent-1.4-1.9-1.9-1.9-2.2-2.5-2.3-2.2
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets srt:ConsolidationEliminations0.10.10.10.10.10.10.10.1

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value51584935446044344431395739723992402940344016371937643749372639942665264433383348337935373477348434793644356435683506375037123686361237953692
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.214.614.314.414.213.113.313.813.813.813.813.013.313.313.515.010.510.512.512.312.613.213.713.613.714.013.913.913.514.313.313.513.213.713.3

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value25142074203320371565158415991624
Percentage of MinorityInterest51.046.545.946.039.639.940.140.3
Percentage of Assets7.46.76.66.55.25.35.55.6
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities21.117.417.116.514.314.415.615.7

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value24152384239923922391238823922409
Percentage of MinorityInterest48.953.554.154.060.460.159.959.7
Percentage of Assets7.17.67.87.77.98.08.38.3
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities18.418.017.917.618.217.918.418.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value41110000
Percentage of MinorityInterest0.10.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.00.00.0409000.00.00.00.00.0
Percentage of MinorityInterest0.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets srt:ConsolidationEliminations-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value4641768757719259251245282284286289340325320141163157165156150130117106132141157149140179186182176167193215199252243256
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.72.52.52.30.90.80.81.01.01.01.01.21.21.20.50.60.60.60.60.60.50.50.40.50.50.60.60.50.70.70.70.60.60.71.21.11.31.21.1

dei:LegalEntity

mgm:GrandParadiseMacau



Period End2019-12-312018-12-312017-12-312016-12-312016-09-30
Value3436394343
Percentage of OtherLiabilitiesNoncurrent0.713.913.713.213.4
Percentage of Assets0.10.10.10.20.2
Percentage of Assets mgm:GrandParadiseMacau0.00.00.00.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value476485452419215204194174
Percentage of OtherLiabilitiesNoncurrent10.363.259.758.383.281.279.261.4
Percentage of Assets1.41.61.51.30.70.70.70.6
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities4.04.13.83.42.01.91.91.7

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value23392320232723322247225122592305
Percentage of OtherLiabilitiesNoncurrent50.4301.8307.2324.3867.0895.7919.4810.6
Percentage of Assets6.97.47.67.57.47.57.87.9
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities17.817.517.417.217.116.917.417.5

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value131519314939487457210722572357268
Percentage of OtherLiabilitiesNoncurrent283.31211.61240.01215.92781.62874.02944.82555.6
Percentage of Assets38.829.930.528.123.924.125.024.9
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities33.528.228.327.023.824.124.324.8

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8583434239403836
Percentage of OtherLiabilitiesNoncurrent1.910.95.75.915.116.015.613.0
Percentage of Assets0.30.30.10.10.10.10.10.1
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities0.30.30.20.20.20.20.20.2

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-11411-11435-11459-10820-9453-9470-9482-9501
Percentage of OtherLiabilitiesNoncurrent-245.9-1487.5-1512.6-1504.3-3646.8-3766.9-3859.0-3340.6
Percentage of Assets-33.7-36.7-37.2-34.7-31.3-31.6-32.7-32.6
Percentage of Assets srt:ConsolidationEliminations19.522.322.321.420.120.320.721.2

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value817377276060652067866512677368477370761263086511637662206190553251995119590158284273409044204457434342314262428943724365555357255878608662482919299825402849387039746060
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.922.819.421.221.821.622.623.625.226.121.722.822.522.122.320.820.420.322.121.515.915.317.417.417.116.216.616.716.816.620.021.021.521.922.415.615.813.314.317.20.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value43834309435346794279433043744443
Percentage of StockholdersEquity56.771.166.869.065.763.963.958.4
Percentage of Assets12.913.814.115.014.214.415.115.2
Percentage of Assets mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities36.836.136.538.039.139.342.642.9

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value50114931495649594383436742034040
Percentage of StockholdersEquity64.881.476.073.167.364.561.453.1
Percentage of Assets14.815.816.115.914.514.614.513.9
Percentage of Assets mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities38.137.337.036.633.332.732.330.7

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2451321982220372189921481213212107320589
Percentage of StockholdersEquity317.2362.7338.0322.7329.9314.8307.8270.5
Percentage of Assets72.470.571.570.371.171.172.770.6
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities62.466.566.367.570.971.070.970.3

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value77276060652067866512677368477577
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.099.5
Percentage of Assets22.819.421.221.821.622.623.626.0
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities27.425.027.729.028.630.431.335.8

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-33907-31223-31347-31538-30144-30019-29651-29073
Percentage of StockholdersEquity-438.8-515.2-480.8-464.7-462.9-443.2-433.0-381.9
Percentage of Assets-100.1-100.2-101.7-101.3-99.8-100.2-102.3-99.7
Percentage of Assets srt:ConsolidationEliminations57.860.961.162.464.164.264.664.9

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value4555555555555555555544444444444444444444
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value4934420122552359238424232510243123722252922836689545521-14-488-55522515961-107234270165579512722021314371618176419812161-1156-1066-927-609370
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.612.47.27.77.78.08.48.48.17.73.22.92.41.91.9-0.1-1.9-2.20.80.60.2-0.40.91.10.70.20.40.50.80.85.25.96.47.17.8-6.2-5.6-4.8-3.11.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value-39-10-46-26-24-86-3-7-3-9-9715121011141413131281512121111714121165-320-1-2-1
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.1-0.0-0.2-0.1-0.1-0.00.0-0.0-0.0-0.0-0.0-0.00.00.10.00.00.00.10.10.10.10.00.00.10.00.00.00.00.00.10.00.00.00.0-0.00.0-0.0-0.0-0.0-0.0

us-gaap:StatementEquityComponents

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-31
Value02
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.4-21.6
Percentage of Assets0.00.0
Percentage of Assets mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.0

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-31
Value2828
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-71.2-283.0
Percentage of Assets0.10.1
Percentage of Assets us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-31
Value-83-29
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax208.9289.2
Percentage of Assets-0.2-0.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-31
Value-541
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax137.2-15.4
Percentage of Assets-0.10.0
Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-4224543885683993273025155776945722312330394-4469130
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.814.311.717.612.610.710.018.020.526.720.21.68.42.025.7-3.14.88.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value185159195-439147148139145118
Percentage of NetCashProvidedByUsedInOperatingActivities40.841.134.4-109.945.049.227.025.117.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.84.86.1-13.84.84.94.95.14.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities82.070.686.6-162.051.852.763.167.355.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value135124205164-24-5356352580
Percentage of NetCashProvidedByUsedInOperatingActivities29.832.136.141.1-7.5-17.710.961.083.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.33.86.45.2-0.8-1.82.012.522.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities11.710.617.914.0-2.2-5.46.137.868.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9816436078232632038723787
Percentage of NetCashProvidedByUsedInOperatingActivities21.642.363.4195.799.8106.175.141.112.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.14.911.224.610.710.613.58.43.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities4.87.717.440.417.616.320.012.65.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value35-59-177-107-121-113-67-157-92
Percentage of NetCashProvidedByUsedInOperatingActivities7.8-15.4-31.2-26.9-37.3-37.7-13.0-27.2-13.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-1.8-5.5-3.4-4.0-3.8-2.4-5.6-3.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00-15000000
Percentage of NetCashProvidedByUsedInOperatingActivities0.00.0-2.70.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.50.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations-0.0-0.06.9-0.0-0.0-0.0-0.0-0.0-0.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value23624548-151-150-726-284-1119-247-432-453-533-110-165-54-49-316-55-171
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax104.9142.8-4.6-4.7-22.9-9.3-36.9-8.6-15.3-17.5-18.9-7.3-11.2-3.5-3.2-21.7-3.9-11.2

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00300-103500-462
Percentage of NetCashProvidedByUsedInInvestingActivities0.0-0.0-2.50.00.392.50.00.0102.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.1-0.0-0.0-34.2-0.0-0.0-17.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities0.00.01.7-0.0-0.3-366.8-0.0-0.1-215.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-86-38-34-101-101-191-261-238-279
Percentage of NetCashProvidedByUsedInInvestingActivities-1.925.522.714.035.617.2105.855.161.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.7-1.2-1.1-3.2-3.3-6.3-9.1-8.4-10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities-7.5-3.3-3.0-8.7-9.0-19.3-28.4-25.5-32.9

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-88-228-351-1413-326-369-399-296-202
Percentage of NetCashProvidedByUsedInInvestingActivities-2.0150.9233.0194.5114.733.0161.768.544.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.8-6.9-10.9-44.5-10.7-12.2-14.0-10.5-7.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities-4.4-10.7-16.9-73.0-17.6-18.8-20.6-15.7-11.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00000000462
Percentage of NetCashProvidedByUsedInInvestingActivities0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-101.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.017.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value472411523078714347641310228
Percentage of NetCashProvidedByUsedInInvestingActivities103.9-76.4-153.2-108.4-50.6-42.6-167.5-23.6-6.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax148.33.57.224.84.715.714.53.61.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations-2091.4-51.3-102.3-387.4-66.4-220.0-187.7-47.2-13.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1744-3909-162-48224181845-521-117-72619018-12-436227-12541145527
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax77.4-122.7-4.9-15.00.86.027.9-18.2-4.1-28.06.71.3-0.8-28.014.8-86.178.934.4

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-136-59-163453-136645-129-124-534
Percentage of NetCashProvidedByUsedInFinancingActivities3.536.734.01826.0-74.876.424.8106.573.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.3-1.8-5.114.3-4.521.3-4.5-4.4-20.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities-60.5-26.3-72.6167.3-47.9228.9-58.7-57.8-249.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-101-70-195-21045492-58-10069
Percentage of NetCashProvidedByUsedInFinancingActivities2.643.240.6-848.125.258.311.286.2-9.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.2-2.1-6.1-6.61.516.3-2.0-3.62.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities-8.8-6.0-17.1-18.04.049.4-6.4-10.88.2

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2446-7265181742020134
Percentage of NetCashProvidedByUsedInFinancingActivities-0.6-28.915.12622.044.88.8-4.0-17.9-18.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.4-2.320.52.72.50.70.75.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities1.22.2-3.533.74.43.81.11.17.7

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value102836143-8133410859189-367
Percentage of NetCashProvidedByUsedInFinancingActivities-26.3-22.5-29.6-329.0184.012.9-11.5-162.150.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.31.14.4-2.611.03.62.16.7-14.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-4724-115-193-787-143-476-413-102-28
Percentage of NetCashProvidedByUsedInFinancingActivities120.871.540.0-3170.9-79.1-56.479.487.33.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-148.3-3.5-6.0-24.8-4.7-15.7-14.5-3.6-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations2091.451.385.5387.466.4220.0187.747.213.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-4224543885683993273025155776945722312330394-4469130
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.814.311.717.612.610.710.018.020.526.720.21.68.42.025.7-3.14.88.5

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value185159195-439147148139145118
Percentage of NetCashProvidedByUsedInOperatingActivities40.841.134.4-109.945.049.227.025.117.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.84.86.1-13.84.84.94.95.14.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities82.070.686.6-162.051.852.763.167.355.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value135124205164-24-5356352580
Percentage of NetCashProvidedByUsedInOperatingActivities29.832.136.141.1-7.5-17.710.961.083.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.33.86.45.2-0.8-1.82.012.522.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities11.710.617.914.0-2.2-5.46.137.868.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9816436078232632038723787
Percentage of NetCashProvidedByUsedInOperatingActivities21.642.363.4195.799.8106.175.141.112.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.14.911.224.610.710.613.58.43.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities4.87.717.440.417.616.320.012.65.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value35-59-177-107-121-113-67-157-92
Percentage of NetCashProvidedByUsedInOperatingActivities7.8-15.4-31.2-26.9-37.3-37.7-13.0-27.2-13.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-1.8-5.5-3.4-4.0-3.8-2.4-5.6-3.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00-15000000
Percentage of NetCashProvidedByUsedInOperatingActivities0.00.0-2.70.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.50.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations-0.0-0.06.9-0.0-0.0-0.0-0.0-0.0-0.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value8062011-374331-2314212322313931492102062453547466-7816697169-342-20105108-56-31-926-181-145-217-1233441-89-139-317-883-96-433-750-212
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.863.2-1.11.31.0-0.84.74.37.953.75.37.97.61.021.320.93.0-35.72.94.17.3-14.3-0.84.14.1-2.3-1.3-3.70.3-8.0-6.3-9.5-5.5190.6-6.0-9.4-20.4-57.5-6.6-29.9-48.9-14.2

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4646454649503442233233
Percentage of NetIncomeLoss2.3-124.0105.8148.3-214.135.328.218.91.721.915.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.41.41.51.61.71.21.50.91.21.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities20.820.420.317.117.617.915.819.610.717.918.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value514134532821737-44139
Percentage of NetIncomeLoss2.6-112.879.9171.7-122.31.714.416.8-0.327.718.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.61.31.11.70.90.10.61.3-0.21.51.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities4.43.63.04.62.50.21.94.0-0.55.45.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2910104232306191311247278123418355
Percentage of NetIncomeLoss144.7-281.4534.5980.7-822.8218.1200.1124.48.9280.5168.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.43.27.29.76.310.38.79.94.814.813.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities143.44.911.215.910.415.812.814.77.120.218.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2011-374331-231421232231387148209
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.099.599.599.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.2-1.11.31.0-0.84.74.37.953.45.27.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3008-192-312-407-270-364-300-357-142-492-428
Percentage of NetIncomeLoss-149.6518.2-720.2-1300.71159.2-255.1-242.8-160.2-10.2-330.1-203.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-94.5-5.8-9.7-12.8-8.9-12.0-10.5-12.7-5.5-17.4-16.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1331.985.1138.5200.1124.8168.2136.3165.566.2267.8230.9

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value674206567666517114026614251762412536956151491-147394126212-287501731914023-3022-1188-154-70-203-19-1063450-89-139-317-883-96
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 RevenueFromContractWithCustomerExcludingAssessedTax29.964.90.22.42.10.25.74.99.454.96.29.19.32.822.322.74.1-67.24.25.39.1-12.12.06.77.31.61.0-1.21.0-51.8-6.9-3.0-8.9-0.8-4.8191.1-6.0-9.4-20.4-57.5-6.6

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7268676668694858314343
Percentage of ProfitLoss3.51123.189.0100.31190.140.834.221.82.224.818.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.12.12.12.22.31.72.11.21.51.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities32.330.330.024.524.124.821.827.014.823.923.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7461446639112164185759
Percentage of ProfitLoss3.61004.158.5101.0677.46.715.224.31.332.724.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.41.81.42.11.30.40.72.30.72.02.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities6.55.23.95.73.41.22.36.92.27.68.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2915105233308191311247278123418355
Percentage of ProfitLoss141.11733.8306.5466.13332.2181.8176.4104.48.7236.9147.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.53.27.29.76.310.38.79.94.814.813.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities143.74.911.215.910.415.812.814.77.120.218.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2011-374331-231421232231387148209
Percentage of ProfitLoss97.4-608.357.047.3-405.083.488.183.997.384.186.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.2-1.11.31.0-0.84.74.37.953.45.27.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3008-192-313-406-270-364-300-357-142-492-428
Percentage of ProfitLoss-145.6-3152.6-411.0-614.7-4694.7-212.6-214.0-134.4-10.0-278.9-177.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-94.5-5.8-9.7-12.8-8.9-12.0-10.5-12.7-5.5-17.4-16.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations1331.985.1138.7199.9124.8168.2136.3165.566.2267.8230.9

Increase Decrease In Other Operating Capital Net

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value31-2-406-5151-1220-40-63-3305-30-69-2-2-2-12-30-53-2
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value23624548-151-150-726-284-1119-247-432-453-533-110-165-54-49-316-55-171
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax104.9142.8-4.6-4.7-22.9-9.3-36.9-8.6-15.3-17.5-18.9-7.3-11.2-3.5-3.2-21.7-3.9-11.2

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00300-103500-462
Percentage of NetCashProvidedByUsedInInvestingActivities0.0-0.0-2.50.00.392.50.00.0102.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.1-0.0-0.0-34.2-0.0-0.0-17.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities0.00.01.7-0.0-0.3-366.8-0.0-0.1-215.8

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-86-38-34-101-101-191-261-238-279
Percentage of NetCashProvidedByUsedInInvestingActivities-1.925.522.714.035.617.2105.855.161.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.7-1.2-1.1-3.2-3.3-6.3-9.1-8.4-10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities-7.5-3.3-3.0-8.7-9.0-19.3-28.4-25.5-32.9

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-88-228-351-1413-326-369-399-296-202
Percentage of NetCashProvidedByUsedInInvestingActivities-2.0150.9233.0194.5114.733.0161.768.544.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.8-6.9-10.9-44.5-10.7-12.2-14.0-10.5-7.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities-4.4-10.7-16.9-73.0-17.6-18.8-20.6-15.7-11.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00000000462
Percentage of NetCashProvidedByUsedInInvestingActivities0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-101.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.017.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value472411523078714347641310228
Percentage of NetCashProvidedByUsedInInvestingActivities103.9-76.4-153.2-108.4-50.6-42.6-167.5-23.6-6.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax148.33.57.224.84.715.714.53.61.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations-2091.4-51.3-102.3-387.4-66.4-220.0-187.7-47.2-13.2

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value732561611381832623624434184645264164566726195434274664063012922542471771921821369711334784925531429
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.0-12000.012000.0783000.0605000.013000.0177000.0488000.00.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.00.0-0.00.00.30.20.00.00.10.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value86383474106188257236291362
Percentage of PaymentsToAcquirePropertyPlantAndEquipment33.924.125.040.740.452.258.056.562.668.8

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value169122103108155172185181173164
Percentage of PaymentsToAcquirePropertyPlantAndEquipment66.175.975.059.359.347.742.043.437.331.2

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.0-12000.00.00.00.00.00.00.00.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.00.0-0.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1744-3909-162-48224181845-521-117-72619018-12-436227-12541145527
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax77.4-122.7-4.9-15.00.86.027.9-18.2-4.1-28.06.71.3-0.8-28.014.8-86.178.934.4

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-136-59-163453-136645-129-124-534
Percentage of NetCashProvidedByUsedInFinancingActivities3.536.734.01826.0-74.876.424.8106.573.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.3-1.8-5.114.3-4.521.3-4.5-4.4-20.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorMGPSubsidiaries srt:ReportableLegalEntities-60.5-26.3-72.6167.3-47.9228.9-58.7-57.8-249.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-101-70-195-21045492-58-10069
Percentage of NetCashProvidedByUsedInFinancingActivities2.643.240.6-848.125.258.311.286.2-9.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.2-2.1-6.1-6.61.516.3-2.0-3.62.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:NonGuarantorOtherSubsidiaries srt:ReportableLegalEntities-8.8-6.0-17.1-18.04.049.4-6.4-10.88.2

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2446-7265181742020134
Percentage of NetCashProvidedByUsedInFinancingActivities-0.6-28.915.12622.044.88.8-4.0-17.9-18.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.4-2.320.52.72.50.70.75.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities1.22.2-3.533.74.43.81.11.17.7

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value102836143-8133410859189-367
Percentage of NetCashProvidedByUsedInFinancingActivities-26.3-22.5-29.6-329.0184.012.9-11.5-162.150.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.31.14.4-2.611.03.62.16.7-14.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-4724-115-193-787-143-476-413-102-28
Percentage of NetCashProvidedByUsedInFinancingActivities120.871.540.0-3170.9-79.1-56.479.487.33.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-148.3-3.5-6.0-24.8-4.7-15.7-14.5-3.6-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations2091.451.385.5387.466.4220.0187.747.213.2

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-31
Value000250075000100000350010000
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.00.0100.0100.00.00.0100.00.00.0100.00.0100.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value000750000
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.00.0100.00.00.00.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0015000000
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.060.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0010000000
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.040.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility

us-gaap:RepaymentsOfLongTermDebt

mgm:SeniorSecuredTermLoanA, mgm:SeniorCreditFacility



Period End2019-11-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7500333433
Percentage of RepaymentsOfLongTermDebt100.00.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorSecuredTermLoanA mgm:SeniorCreditFacility0.00.00.00.00.00.00.00.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

mgm:SeniorSecuredTermLoanA, mgm:OperatingPartnershipSeniorCreditFacility



Period End2019-11-30
Value65
Percentage of RepaymentsOfLongTermDebt8.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorSecuredTermLoanA mgm:OperatingPartnershipSeniorCreditFacility0.0

mgm:SeniorSecuredTermLoanB, mgm:OperatingPartnershipSeniorCreditFacility



Period End2019-11-30
Value476
Percentage of RepaymentsOfLongTermDebt63.5
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorSecuredTermLoanB mgm:OperatingPartnershipSeniorCreditFacility0.0

us-gaap:LongtermDebtType, us-gaap:CreditFacility

mgm:MGMChinaCreditFacility, us-gaap:RevolvingCreditFacility



Period End2022-03-31
Value0.0
Percentage of RepaymentsOfLongTermDebt0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:MGMChinaCreditFacility us-gaap:RevolvingCreditFacility0.0

Payments Of Dividends

Payments Of Dividends

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value35339235628101491765943620327000
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value3923561491765943620
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.00.0

us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

mgm:BlackstoneRealEstateIncomeTrust, us-gaap:CommonClassA



Period End2020-02-14
Value150
Percentage of PaymentsForRepurchaseOfCommonStock0.0

us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

mgm:BlackstoneRealEstateIncomeTrust, us-gaap:CommonClassA, us-gaap:SubsequentEvent



Period End2020-02-14
Value150
Percentage of PaymentsForRepurchaseOfCommonStock0.0

Repayments Of Long Term Debt

us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility

us-gaap:RepaymentsOfLongTermDebt

mgm:SeniorSecuredTermLoanA, mgm:SeniorCreditFacility



Period End2019-11-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7500333433
Percentage of RepaymentsOfLongTermDebt100.00.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorSecuredTermLoanA mgm:SeniorCreditFacility0.00.00.00.00.00.00.00.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

mgm:SeniorSecuredTermLoanA, mgm:OperatingPartnershipSeniorCreditFacility



Period End2019-11-30
Value65
Percentage of RepaymentsOfLongTermDebt8.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorSecuredTermLoanA mgm:OperatingPartnershipSeniorCreditFacility0.0

mgm:SeniorSecuredTermLoanB, mgm:OperatingPartnershipSeniorCreditFacility



Period End2019-11-30
Value476
Percentage of RepaymentsOfLongTermDebt63.5
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorSecuredTermLoanB mgm:OperatingPartnershipSeniorCreditFacility0.0

us-gaap:LongtermDebtType, us-gaap:CreditFacility

mgm:MGMChinaCreditFacility, us-gaap:RevolvingCreditFacility



Period End2022-03-31
Value0.0
Percentage of RepaymentsOfLongTermDebt0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:MGMChinaCreditFacility us-gaap:RevolvingCreditFacility0.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateStatedPercentage

mgm:OperatingPartnershipSeniorNotesFivePointSevenFivePercentDueTwoThousandTwentySeven



Period End2019-12-31
Value0.0575
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:OperatingPartnershipSeniorNotesFivePointSevenFivePercentDueTwoThousandTwentySeven0.0

mgm:SeniorNotesFivePointFiveZeroZeroPercentDueTwoThousandTwentySeven



Period End2020-03-31
Value0.055
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorNotesFivePointFiveZeroZeroPercentDueTwoThousandTwentySeven0.0

mgm:SeniorNotesFivePointSevenFiveZeroPercentDueTwoThousandTwentyFive



Period End2020-03-31
Value0.0575
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorNotesFivePointSevenFiveZeroPercentDueTwoThousandTwentyFive0.0

us-gaap:DebtInstrument, us-gaap:PropertyPlantAndEquipmentByType

mgm:SecuredNoteDue2024InterestRateInFifthYear, mgm:CircusCircusLasVegasAndAdjacentLand



Period End2019-12-31
Value0.045
Percentage of DebtInstrumentInterestRateStatedPercentage78.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SecuredNoteDue2024InterestRateInFifthYear mgm:CircusCircusLasVegasAndAdjacentLand0.0

mgm:SecuredNoteDue2024InterestRateInFirstTwoYears, mgm:CircusCircusLasVegasAndAdjacentLand



Period End2019-12-31
Value0.03
Percentage of DebtInstrumentInterestRateStatedPercentage52.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SecuredNoteDue2024InterestRateInFirstTwoYears mgm:CircusCircusLasVegasAndAdjacentLand0.0

mgm:SecuredNoteDue2024InterestRateInFollowingTwoYears, mgm:CircusCircusLasVegasAndAdjacentLand



Period End2019-12-31
Value0.04
Percentage of DebtInstrumentInterestRateStatedPercentage69.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SecuredNoteDue2024InterestRateInFollowingTwoYears mgm:CircusCircusLasVegasAndAdjacentLand0.0

us-gaap:DebtInstrument, us-gaap:SubsequentEventType

mgm:SeniorNotesFivePointFiveZeroZeroPercentDueTwoThousandTwentySeven, us-gaap:SubsequentEvent



Period End2020-02-18
Value0.055
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorNotesFivePointFiveZeroZeroPercentDueTwoThousandTwentySeven us-gaap:SubsequentEvent0.0

mgm:SeniorNotesFivePointSevenFiveZeroPercentDueTwoThousandTwentyFive, us-gaap:SubsequentEvent



Period End2020-02-18
Value0.0575
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorNotesFivePointSevenFiveZeroPercentDueTwoThousandTwentyFive us-gaap:SubsequentEvent0.0

mgm:SeniorNotesFourPointSixTwoFivePercentDueTwoThousandTwentySix, us-gaap:SubsequentEvent



Period End2020-02-18
Value0.04625
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorNotesFourPointSixTwoFivePercentDueTwoThousandTwentySix us-gaap:SubsequentEvent0.0

mgm:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyFive, us-gaap:SubsequentEvent



Period End2020-04-23
Value0.0675
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mgm:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyFive us-gaap:SubsequentEvent0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-312013-03-31
Value0.28-0.11700000000000002-6.2080.1330.5190.1590.10.144-0.472-1.4480.3950.2350.1980.031-0.0870.0160.22-0.2110.0310.57-0.1680.434-0.0190.574
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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 End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value362415173219171716161515151613121212878109888999
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2106134213042551268026842349229434223233
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value138982788473349458794911291011
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxAuthority

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value132172285472548957693811271010890
Percentage of DeferredTaxAssetsNet95.187.296.598.999.098.198.899.899.90.0

us-gaap:ForeignCountry



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value681053084111121011817
Percentage of DeferredTaxAssetsNet4.912.83.51.11.01.91.20.2100.00.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value332418141331106153145134161102
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsValuationAllowance

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value24692449246225102736249816651032836
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1042851737060566063
Percentage of DeferredTaxAssetsValuationAllowance4.21.12.12.92.62.43.45.9720.2

us-gaap:StateAndLocalJurisdiction



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value33363181516136
Percentage of DeferredTaxAssetsValuationAllowance0.10.11.50.10.70.61.01.368.3

us-gaap:StatementGeographical

country:MO



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1022649716960
Percentage of DeferredTaxAssetsValuationAllowance4.11.12.02.82.52.4

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
Value842543926506646416560
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.00.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value6016232912331160122315261302127215251499198614461670
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value2021535374594928928025911383600
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents8.712.44.66.13.93.822.818.417.357.324.90.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value609660646668817898649912902532678827
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents26.253.555.754.753.668.951.059.860.226.846.949.5

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value418384402410389307281273311292307304
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents17.931.234.733.525.523.622.117.920.714.721.318.2

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value1077123670259475259262399538
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents46.21.03.15.817.03.64.13.91.81.26.932.3

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value222222000000000
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents1.01.81.90.00.00.00.00.00.00.00.00.0

Proceeds From Sale Of Short Term Investments

us-gaap:ConsolidationItems

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense

us-gaap:OperatingSegments



Period End2020-03-312019-03-31
Value397808
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mgm:LasVegasStripResorts



Period End2020-03-312019-03-31
Value267403
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense67.349.9

us-gaap:OperatingSegments, mgm:MGMChina



Period End2020-03-312019-03-31
Value-21192
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense-5.523.9

us-gaap:OperatingSegments, mgm:RegionalOperations



Period End2020-03-312019-03-31
Value151211
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense38.226.2

us-gaap:ConsolidationItems

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization

us-gaap:OperatingSegments



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value815886844800762756745768643831773790630720634599561539590538558541624643594540580541
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mgm:LasVegasStripResorts



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value380441418403400419435449
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization46.649.749.550.452.655.458.558.5

us-gaap:OperatingSegments, mgm:MGMChina



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value191182170190166130119151
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization23.420.520.223.821.917.216.119.8

us-gaap:OperatingSegments, mgm:RegionalOperations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value244263255206194207189167
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization30.029.730.225.825.627.425.521.8

mgm:AdjustmentRelatedToRedeemableNoncontrollingInterests



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value83-30-3-6-4-5-4-180000000
Percentage of AdjustmentRelatedToRedeemableNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:StatementScenario

mgm:AnnualTermLoanRepaymentPercentageOfInitialAggregatePrincipalAmount

mgm:SeniorSecuredTermLoanA, mgm:SeniorCreditFacility, us-gaap:ScenarioForecast



Period End2020-03-31
Value0.0125
Percentage of AnnualTermLoanRepaymentPercentageOfInitialAggregatePrincipalAmount100.0

us-gaap:ProductOrService

mgm:ChangeInContractAndContractRelatedLiabilities

mgm:CustomerAdvancesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-10936-143-25-531045218-47109425-37
Percentage of ChangeInContractAndContractRelatedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:LoyaltyProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1141577420300
Percentage of ChangeInContractAndContractRelatedLiabilities-1.54.0-3.2-7.7-10.77.613.626.7-5.0-0.883.6-2.5-1.2

mgm:OutstandingChipLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13-13514-15-226-209-20181280-22963
Percentage of ChangeInContractAndContractRelatedLiabilities12.1-36.9-4.0-56.929.7-217.4-398.2-111.3-385.9254.9-51.1116.4-169.4

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:ChangeInIntercompanyPayableFinancingActivities

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value15-103-69-558813079467960
Percentage of ChangeInIntercompanyPayableFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-85064078276222614543
Percentage of ChangeInIntercompanyPayableFinancingActivities-53.6-48.7-9.7-731.593.858.427.556.0184.772.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value481026239052358354393111-123241
Percentage of ChangeInIntercompanyPayableFinancingActivities30611.2-253.5-564.6-938.466.1271.5492.3239.8-156.0401.3

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4818-209-328-875-229-560-495-184-101-345
Percentage of ChangeInIntercompanyPayableFinancingActivities-30657.6202.3474.41569.9-259.9-429.9-619.8-395.8-128.7-573.9

mgm:CommissionsComplimentariesAndOtherIncentives



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4542498687601602600594520540600535473485
Percentage of CommissionsComplimentariesAndOtherIncentives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:CorporateIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-143-118-108-108-129-118-98-103-99-115-88-79-73-71-87-81-71-90-74
Percentage of CorporateIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-5-4-3-13-13-13-10-10-24-4-2
Percentage of CorporateIncomeExpense4.64.23.710.111.614.010.410.521.04.63.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-6-4-5-4-5-4-5-5000
Percentage of CorporateIncomeExpense5.44.64.83.64.95.05.05.4-0.2-0.1-0.1

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-72-56-54-53-60-51-53-50-54-53-45
Percentage of CorporateIncomeExpense61.052.350.041.051.452.551.950.747.460.257.1

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-34-42-44-58-43-33-39-39-40-31-31
Percentage of CorporateIncomeExpense29.038.941.645.437.034.438.439.535.335.439.7

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value00005556400
Percentage of CorporateIncomeExpense-0.0-0.0-0.0-0.0-5.0-6.0-5.7-6.1-3.5-0.2-0.2

mgm:CostOfCasinoAndHotelOperationsAndReimbursableExpense



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1899193619041862182617871669163515411593150815221455142513121301
Percentage of CostOfCasinoAndHotelOperationsAndReimbursableExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value00044444300000
Percentage of CostOfCasinoAndHotelOperationsAndReimbursableExpense0.00.00.02.42.42.40.00.00.00.00.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value718734714721706629572582517470455
Percentage of CostOfCasinoAndHotelOperationsAndReimbursableExpense37.837.937.538.738.735.234.335.733.629.630.2

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11771200118811041083112210941050102211251063
Percentage of CostOfCasinoAndHotelOperationsAndReimbursableExpense62.062.062.459.359.362.865.664.266.370.670.4

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value31223222322
Percentage of CostOfCasinoAndHotelOperationsAndReimbursableExpense0.20.10.10.10.20.10.20.20.20.20.2

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value000-11-11-900000
Percentage of CostOfCasinoAndHotelOperationsAndReimbursableExpense-0.0-0.00.0-0.6-0.6-0.6-0.0-0.0-0.1-0.1-0.1

us-gaap:LongtermDebtType, us-gaap:StatementScenario

mgm:DebtInstrumentScheduledAmortizationPaymentsBeginningOnLastDayOfEachCalendarQuarterFromSpecifiedPeriodAsPercentageOfOriginalPrincipalBalance

mgm:MGMNationalHarborCreditFacility, us-gaap:ScenarioForecast



Period End2020-12-312019-12-31
Value0.0250.01875
Percentage of DebtInstrumentScheduledAmortizationPaymentsBeginningOnLastDayOfEachCalendarQuarterFromSpecifiedPeriodAsPercentageOfOriginalPrincipalBalance100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss

mgm:CityCenter



Period End2019-12-312019-09-302018-12-312018-09-30
Value28614526
Percentage of EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss100.0100.0100.0100.0

mgm:FinanceLeaseCost



Period End2020-03-312019-03-31
Value162
Percentage of FinanceLeaseCost100.0100.0

mgm:FinanceLeaseInterestExpenseCredit



Period End2020-03-312019-03-31
Value-952000.0209000.0
Percentage of FinanceLeaseInterestExpenseCredit100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences

mgm:Bellagio



Period End2019-12-31
Value2700
Percentage of GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:GainLossOnSaleOfBusinessPerShare

mgm:Bellagio



Period End2019-12-31
Value4.04
Percentage of GainLossOnSaleOfBusinessPerShare100.0

mgm:GainsLossesOnExtinguishmentOfDebtPerShare



Period End2019-12-31
Value0.21
Percentage of GainsLossesOnExtinguishmentOfDebtPerShare100.0

mgm:GoodwillImpairmentAndPropertyTransactionsNet



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value112495828-4216527713112-105
Percentage of GoodwillImpairmentAndPropertyTransactionsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value09011014414110
Percentage of GoodwillImpairmentAndPropertyTransactionsNet-4.44.05.412.75.1-0.885.069.354.021.679.9

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1010240005-23
Percentage of GoodwillImpairmentAndPropertyTransactionsNet11.00.020.5-2.385.20.1-0.712.818.5-26.723.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10232474-4217522613
Percentage of GoodwillImpairmentAndPropertyTransactionsNet93.493.075.189.014.599.9100.787.281.588.998.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value07000000000
Percentage of GoodwillImpairmentAndPropertyTransactionsNet0.03.00.00.00.0-0.00.00.00.00.00.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0000-10-14-4-141-13
Percentage of GoodwillImpairmentAndPropertyTransactionsNet0.00.0-0.90.6-4.90.8-85.0-69.3-54.016.2-101.9

mgm:IncomeLossFromUnconsolidatedAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value35173627383235473128374039323244814405742117-223518163616-375-130326335-7-26-8024-1324
Percentage of IncomeLossFromUnconsolidatedAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-7-4-410000000
Percentage of IncomeLossFromUnconsolidatedAffiliates-42.6-13.6-16.14.4-1.6-1.2-0.70.4-0.2-2.3-0.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2541313733354831283840
Percentage of IncomeLossFromUnconsolidatedAffiliates142.6113.6116.195.6101.6101.2100.799.6100.3102.5100.2

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterHoldingsLLCAsInvestee



Period End2020-03-312019-03-31
Value2034
Percentage of IncomeLossFromUnconsolidatedAffiliates57.889.9

mgm:MGPBREITVenture



Period End2020-03-312019-03-31
Value190
Percentage of IncomeLossFromUnconsolidatedAffiliates55.80.0

mgm:OtherUnconsolidatedAffiliates



Period End2020-03-312019-03-31
Value-43
Percentage of IncomeLossFromUnconsolidatedAffiliates-13.610.1

mgm:IncomeLossFromUnconsolidatedAffiliatesRelatedToInvestmentsInREITs



Period End2020-03-312019-03-31
Value230
Percentage of IncomeLossFromUnconsolidatedAffiliatesRelatedToInvestmentsInREITs100.00.0

us-gaap:CapitalUnitsByClass, dei:LegalEntity

mgm:IssuanceOfOperatingPartnershipUnits

us-gaap:CapitalUnitClassA, mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-02-142020-02-132019-11-222019-12-312019-09-302019-06-302019-01-312017-09-112017-09-30
Value51318032191313
Percentage of IssuanceOfOperatingPartnershipUnits100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:MGPBREITVenture, us-gaap:SubsequentEvent



Period End2020-02-14
Value3
Percentage of IssuanceOfOperatingPartnershipUnits60.0

us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl

mgm:MGPBREITVenture



Period End2020-03-31
Value1
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl100.0

us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

mgm:MGPBREITVenture, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-31
Value-59000.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl-3.4

mgm:MGPBREITVenture, us-gaap:AdditionalPaidInCapital



Period End2020-03-31
Value-6
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl-377.0

mgm:MGPBREITVenture, us-gaap:CommonStock



Period End2020-03-31
Value0.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.0

mgm:MGPBREITVenture, us-gaap:NoncontrollingInterest



Period End2020-03-31
Value8
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl480.4

mgm:MGPBREITVenture, us-gaap:Parent



Period End2020-03-31
Value-6
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl-380.4

mgm:MGPBREITVenture, us-gaap:RetainedEarnings



Period End2020-03-31
Value0.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.0

us-gaap:StatementEquityComponents, dei:LegalEntity

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest, mgm:MGPBREITVenture



Period End2020-03-31
Value59000.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl3.4

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest, mgm:MGPBREITVenture



Period End2020-03-31
Value0.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent, mgm:MGPBREITVenture



Period End2020-03-31
Value0.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest, mgm:MGPBREITVenture



Period End2020-03-31
Value59000.0
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl3.4

mgm:NonOperatingItemsFromUnconsolidatedAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value32714211816111198810671115181622171918221413-73-22-38-22-20-20-26-24-28402627312391412
Percentage of NonOperatingItemsFromUnconsolidatedAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:NoncashLeaseExpense



Period End2020-03-312019-03-31
Value5114
Percentage of NoncashLeaseExpense100.0100.0

us-gaap:CapitalUnitsByClass, dei:LegalEntity

mgm:NumberOfForwardSharesSettled

us-gaap:CapitalUnitClassA, mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-02-142020-02-13
Value513
Percentage of NumberOfForwardSharesSettled100.0100.0

us-gaap:StatementEquityComponents

mgm:OtherComprehensiveIncomeLossOtherTransactions

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-31
Value411000.0-69000.0-72000.023000.0
Percentage of OtherComprehensiveIncomeLossOtherTransactions100.0100.0100.0100.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-31
Value411000.0-69000.0-72000.023000.0
Percentage of OtherComprehensiveIncomeLossOtherTransactions100.0100.0100.0100.0

mgm:OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value-137-24-67-16-22-14-17-10-24-38-11-7-12-28-65-18-19-27-22-22-24-23-14-15-75-23-43-23-18-20-84-26-41-44-19
Percentage of OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-900100-1-1010
Percentage of OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates7.00.30.4-10.43.35.811.010.5-2.7-3.52.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value15-16-132-46-44-49-46-65-19-27
Percentage of OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates-11.568.419.2-15.0206.4302.0282.5427.3262.651.2246.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value111332485-114-104-118-107-114-59-119
Percentage of OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates-81.0-140.5-35.9-517.3502.0702.8678.4988.0460.0152.71058.6

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-11218-22181616151514-1613
Percentage of OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates81.7-75.433.2-113.1-72.3-108.8-88.0-144.4-59.741.5-118.4

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-142-59-56-12412211913612913955123
Percentage of OtherNonoperatingIncomeExpenseIncludingItemsFromUnconsolidatedAffiliates103.7247.283.1755.7-539.5-801.8-783.9-1181.5-560.2-141.8-1089.2

us-gaap:IncomeTaxAuthority, us-gaap:BusinessAcquisition, us-gaap:StatementScenario

mgm:PaymentsRequiredUnderExtendedAnnualFeeArrangement

country:MO, mgm:MGMGrandParadiseSA, us-gaap:ScenarioForecast



Period End2020-03-31
Value300000.0
Percentage of PaymentsRequiredUnderExtendedAnnualFeeArrangement100.0

mgm:PreopeningAndStartUpExpensesNet



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value200184619
Percentage of PreopeningAndStartUpExpensesNet100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value00044317
Percentage of PreopeningAndStartUpExpensesNet-0.0-0.1-7.323.293.189.8

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value2001431
Percentage of PreopeningAndStartUpExpensesNet100.0100.1107.376.86.910.2

mgm:PreopeningCostsFromUnconsolidatedAffiliates



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-09-30
Value000000030000000210000000000
Percentage of PreopeningCostsFromUnconsolidatedAffiliates0.00.00.00.00.00.00.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value524550866454800
Percentage of ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts100.0100.0100.0100.0100.00.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:ProceedsFromPaymentsToIntercompanyActivity

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4724-115-230-787-143-476-413-102-28-271
Percentage of ProceedsFromPaymentsToIntercompanyActivity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value000000004620
Percentage of ProceedsFromPaymentsToIntercompanyActivity-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-1622.1-0.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4724115230787143476413102-433271
Percentage of ProceedsFromPaymentsToIntercompanyActivity-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.01522.1-100.0

mgm:ProceedsFromRelatedPartyTransactions



Period End2020-03-312019-03-31
Value24550
Percentage of ProceedsFromRelatedPartyTransactions100.00.0

mgm:PropertyTransactionsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value54112495828-4216527713112-105149173106330226888590081006318112605499713
Percentage of PropertyTransactionsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:SellingCostOfRealEstate

mgm:MGMGrandLasVegas



Period End2020-02-14
Value27
Percentage of SellingCostOfRealEstate100.0

mgm:MandalayBay



Period End2020-02-14
Value11
Percentage of SellingCostOfRealEstate40.7

mgm:StockIssuedDuringPeriodValueRestrictedStockUnits



Period End2020-03-312019-03-31
Value21
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnits100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-03-31
Value21
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnits100.0100.0

us-gaap:Parent



Period End2020-03-312019-03-31
Value21
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnits100.0100.0

us-gaap:TitleOfIndividual

mgm:TransitionExpense

srt:ChiefExecutiveOfficer



Period End2020-03-312019-03-31
Value440
Percentage of TransitionExpense100.00.0

mgm:TripleNetOperatingLeaseAndGroundLeaseRentExpense



Period End2020-03-312019-03-31
Value1417
Percentage of TripleNetOperatingLeaseAndGroundLeaseRentExpense100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-31
Value00-31-1-1-1-10007000-200
Percentage of AdjustmentsToAdditionalPaidInCapitalOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-411000.069000.072000.023000.00.00.00.00.00.00.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther51.1-15.1-2.32.1-0.0-0.0-0.0-0.00.0-0.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value00-424000-20
Percentage of AdjustmentsToAdditionalPaidInCapitalOther15.0-88.6143.8179.8-341.779.156.053.5-591.675.6

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-31
Value0010-50002000000-100
Percentage of AdjustmentsToAdditionalPaidInCapitalOther33.8203.7-41.5-81.8441.720.944.046.5691.624.40.0-0.349.048.749.049.049.049.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-31
Value00-424000-2007000-100
Percentage of AdjustmentsToAdditionalPaidInCapitalOther66.2-103.7141.5181.8-341.779.156.053.5-591.675.60.0100.351.051.351.051.051.051.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-31
Value3615173217171616151515161312121291010111088878
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value35131530151614131314
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue96.690.793.796.393.092.391.591.191.893.6

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value111111111111110001111000000
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue3.49.36.33.77.07.78.58.58.98.26.46.88.37.87.07.810.012.212.611.712.611.28.58.29.19.20.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value35131530151614141313141512111111899987776811
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue96.690.793.796.393.092.391.591.591.191.893.693.291.792.293.092.290.087.887.488.387.488.891.591.890.990.80.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value799109101010978888991211159999999982223232424151417
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.0-83000.0-30000.0-35000.0-52000.0-27000.0-43000.0-26000.0-165000.0-93000.0-42000.0-62000.0-56000.00.01000.0-8000.0639000.0-86000.0-84000.0-132000.0129000.0-31000.0
Percentage of AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value3121220123336444162217181022233028182826
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3686109672-62-30322429-25225-486
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4899351410-240920-879
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect4.4137.0-56.3-4.74.6-806.6-3.980.3180.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-5014-22-148-80248-26310370
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect-4.619.535.949.1-35.9834.7104.340.7-76.1

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value33-17-632081268-3819
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect3.1-24.5101.4-6.836.488.7-3.3-149.6-3.9

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1064-23-34-189212-5-7323
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect97.1-31.954.562.494.9-16.92.9128.6-0.6

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0022000000
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect0.00.0-35.5-0.00.00.0-0.00.0-0.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-93-93-97-87-85-83-81-81-73-73
Percentage of CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value93939787858381817373
Percentage of CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-31
Value-370-33
Percentage of CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations100.00.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-31
Value37033
Percentage of CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations-100.00.0-100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-31
Value37032
Percentage of CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations100.00.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-31
Value-370-32
Percentage of CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations-100.00.0-100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-31
Value0015
Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations0.00.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-31
Value00-15
Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations0.00.0-100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.150.130.130.130.120.120.120.120.109999999999999990.110.110.110.00.00.00.0
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value277542-150671051218-89-13608222-99-52-457102-25-12-6832594-71-1163-41-65-46-237-44091-72-389
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value318331322334316312300296268249249244249233209206199200204208206202202203207207211218211228235236249177152146158164163167170174
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7171797569666768696860
Percentage of DepreciationAndAmortization21.622.323.823.722.422.222.825.728.027.524.6

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value148141147141155138137112868584
Percentage of DepreciationAndAmortization44.844.144.044.649.646.246.441.734.834.334.5

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value111108106101151156158156162163160
Percentage of DepreciationAndAmortization33.633.631.932.148.352.053.658.365.265.765.5

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value001-1-63-61-67-68-69-68-60
Percentage of DepreciationAndAmortization0.00.00.4-0.4-20.3-20.4-22.8-25.7-28.0-27.5-24.6

us-gaap:Dividends



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value73666869636567636363
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312014-03-312013-09-302013-03-312013-03-312012-03-31
Value000000000024555245245196
Percentage of Dividends0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value73666869636567636363
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value73666869636567636363
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:DividendsCommonStock

mgm:CityCenterHoldingsLLC



Period End2020-04-302019-04-302019-03-312018-09-302018-05-312017-04-30
Value10111664225400600
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

us-gaap:EarlyRepaymentOfSeniorDebt

mgm:SeniorNotesFivePointTwoFivePercentDueInTwoThousandTwenty



Period End2019-12-31
Value267
Percentage of EarlyRepaymentOfSeniorDebt100.0

mgm:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwenty



Period End2019-12-31
Value361
Percentage of EarlyRepaymentOfSeniorDebt135.2

mgm:SeniorNotesSixPointSixTwoFivePercentDueTwoThousandTwentyOneNet



Period End2019-12-31
Value1250
Percentage of EarlyRepaymentOfSeniorDebt468.2

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value22-12-1010-20
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2-12-1010-20
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-31
Value0014
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations0.00.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-31
Value00-14
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations0.00.0-100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1300000154232423361833443334445386488115011
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems

mgm:CityCenter



Period End2019-12-312019-09-302018-12-312018-09-30
Value1333154
Percentage of EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

mgm:CityCenter



Period End2019-12-312019-09-302018-12-312018-09-30
Value133314-1
Percentage of EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationRevenue

mgm:CityCenter



Period End2019-12-312019-09-302018-12-312018-09-30
Value301320334294
Percentage of EquityMethodInvestmentSummarizedFinancialInformationRevenue100.0100.0100.0100.0

us-gaap:FairValueOfAssetsAcquired



Period End2020-03-312019-03-31
Value0625
Percentage of FairValueOfAssetsAcquired0.0100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability



Period End2020-03-312019-03-31
Value10
Percentage of FinanceLeaseInterestPaymentOnLiability100.0100.0

us-gaap:FinanceLeasePrincipalPayments



Period End2020-03-312019-03-31
Value111
Percentage of FinanceLeasePrincipalPayments100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization



Period End2020-03-312019-03-31
Value172
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0

us-gaap:GainsLossesOnExtinguishmentOfDebt



Period End2020-03-312019-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-03-312012-12-312012-02-292012-03-312010-12-312010-09-302009-12-312009-09-30
Value-126-171-142-2-530-10-1-1-14-30000-16-49000000-505-59-58-80-20
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:BusinessAcquisition, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility

mgm:MGPBREITVenture, us-gaap:RevolvingCreditFacility, mgm:SeniorCreditFacility



Period End2020-02-14
Value-4
Percentage of GainsLossesOnExtinguishmentOfDebt0.0

us-gaap:LongtermDebtType

mgm:OperatingPartnershipSeniorCreditFacility



Period End2020-02-29
Value-18
Percentage of GainsLossesOnExtinguishmentOfDebt0.0

us-gaap:SeniorNotes



Period End2020-03-31
Value-105
Percentage of GainsLossesOnExtinguishmentOfDebt82.8

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate



Period End2020-03-312019-03-31
Value14910
Percentage of GainsLossesOnSalesOfInvestmentRealEstate100.00.0

us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:BlackstoneRealEstateIncomeTrust



Period End2019-11-15
Value2700
Percentage of GainsLossesOnSalesOfInvestmentRealEstate0.0

mgm:MGMGrandLasVegas



Period End2020-02-14
Value1700
Percentage of GainsLossesOnSalesOfInvestmentRealEstate0.0

mgm:MandalayBay



Period End2020-02-14
Value252
Percentage of GainsLossesOnSalesOfInvestmentRealEstate0.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-312018-09-30
Value001613
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax0.00.0100.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-312018-09-30
Value00-16-13
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax0.00.0-100.0-100.0

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value392152016233619192830322421431-522332497-210-85-57-18-32-6-58-14-40-244239-25-57-107-9-158
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:IncomeLossFromSubsidiariesNetOfTax

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4630264022272244343336
Percentage of IncomeLossFromSubsidiariesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2837120247259246332309328146417424
Percentage of IncomeLossFromSubsidiariesNetOfTax6079.3398.2940.6646.71107.71214.41373.7737.1427.41254.31172.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2884-151-273-299-268-360-331-372-181-451-461
Percentage of IncomeLossFromSubsidiariesNetOfTax-6179.3-498.2-1040.6-746.7-1207.7-1314.4-1473.7-837.1-527.4-1354.3-1272.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-577-13598-21-97-29-65211341610538-14118416021-93-3148-78-77-119-919-87-7391-66130-125742-5-835930
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-13670735-31-48117571-273149-27-365712-14-22171523654-31-41475-2945544-236-217032
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-09-302012-03-31
Value-17-3-2-29-83180-4813-846611-2-26-7-2-36-17-3012514-62054
Percentage of IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value40-3044-6240-3152-3226-343-3440-3514-3840-1418-2737-15-9-2729-3139253411-1325-2914-324
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312011-06-30
Value10033055707750554-5655-606631
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value162229182205209206192156168135180129212109203153195152225185213180203191200194209218211220260259248251307151
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseArrangementType

us-gaap:LeaseAndRentalExpense

mgm:MasterLease



Period End2020-03-312020-02-142019-04-012019-03-312019-01-312018-04-012017-10-052017-04-012017-03-312016-07-312016-08-022016-08-012016-04-25
Value813813946870770770757662550550650650550
Percentage of LeaseAndRentalExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseArrangementType, us-gaap:SubsequentEventType

mgm:MasterLease, us-gaap:SubsequentEvent



Period End2020-04-012018-04-01
Value828770
Percentage of LeaseAndRentalExpense0.0100.0

us-gaap:LoansAssumed1



Period End2020-03-312019-03-31
Value13040
Percentage of LoansAssumed1100.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value72613517249302742224453022406120207167247059254198
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StatementClassOfStock, dei:LegalEntity

us-gaap:CommonClassA, mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value62444342313029
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders783.6169.1315.8819.5176.1125.5304.1

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

us-gaap:CommonClassA, us-gaap:NoncontrollingInterest, mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value62444342313029
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders783.6169.1315.8819.5176.1125.5304.1

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value72613517249302742224453022406120207167247059254198
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.1

us-gaap:MinorityInterestDecreaseFromRedemptions



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-8303454
Percentage of MinorityInterestDecreaseFromRedemptions100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-8303454
Percentage of MinorityInterestDecreaseFromRedemptions100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-8303454
Percentage of MinorityInterestDecreaseFromRedemptions100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInDiscontinuedOperations

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302018-12-31
Value0014
Percentage of NetCashProvidedByUsedInDiscontinuedOperations0.00.0100.0

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302018-12-31
Value00-14
Percentage of NetCashProvidedByUsedInDiscontinuedOperations0.00.0-100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value67237363169138264173239250
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-134403032261440252944
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest-20.01080.541.351.015.610.415.414.612.317.6

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value806-374331142123223148209206
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest120.0-980.558.749.084.489.684.685.487.782.4

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value806-374331142123223148209206
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest120.0-980.558.749.084.489.684.685.487.782.4

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1



Period End2020-03-312019-03-31
Value8020
Percentage of NoncashOrPartNoncashAcquisitionInvestmentsAcquired1100.00.0

us-gaap:OperatingLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value152262624
Percentage of OperatingLeaseCost100.0100.0100.0100.0

us-gaap:OperatingLeasePayments



Period End2020-03-312019-03-31
Value12217
Percentage of OperatingLeasePayments100.0100.0

us-gaap:IncomeStatementLocation

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

mgm:EntertainmentRetailAndOtherRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value19222222222222222120201919
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:FoodAndBeverageRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10141413121214121311141412
Percentage of OperatingLeasesIncomeStatementLeaseRevenue52.663.663.659.154.554.563.654.561.955.070.073.763.2

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.00.00.00.00.098000.00.00.00.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.00.00.00.00.00.0100.00.00.00.0

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value28-1826-12-2121-24-1-3-25-12
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.00.00.00.00.00.0-1913.30.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-84-15-24-11-184
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-56-331-23-20166-11
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-8326-16-26-13-194513101-301000
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-45-10-16-82390-20
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax54.862.263.364.668.668.668.563.470.676.3

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-37-6-9-41143000
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax45.237.836.735.431.431.431.532.036.629.423.7

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-45-10-16-823970-20
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax54.862.263.364.668.668.668.568.063.470.676.3

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value-5460-350-25-22166-108-1-28-1331-1-401019-135-1106-12281-3
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value30-19-30-15-234616121-4
Percentage of OtherComprehensiveIncomeLossNetOfTax50.754.9-37530.560.7105.129.293.3-158.8145.8-103.914.3

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value33-1826-12-2121-24-1-3-25
Percentage of OtherComprehensiveIncomeLossNetOfTax55.753.032170.748.211.275.220.8234.6-21.4178.088.4

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value18-1014-6-160-130-1-14
Percentage of OtherComprehensiveIncomeLossNetOfTax31.229.917992.726.86.141.38.7129.8-11.396.948.8

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value34-20-1-15-1494-360-16
Percentage of OtherComprehensiveIncomeLossNetOfTax57.159.2-2313.460.366.958.363.037.671.247.557.0

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srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-5634-82419-16-514-7131
Percentage of OtherComprehensiveIncomeLossNetOfTax-94.8-97.0-10219.5-96.0-89.2-104.0-85.7-143.2-84.3-118.4-108.6

us-gaap:StatementEquityComponents

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-31
Value0.0269000.0175000.0-540000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax-0.0-0.8213.42.1

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-31
Value28-1826-12
Percentage of OtherComprehensiveIncomeLossNetOfTax-51.853.032170.748.2

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-06-302019-03-31
Value-83-16-26-13
Percentage of OtherComprehensiveIncomeLossNetOfTax151.847.0-32070.751.8

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-31
Value-54-340-26
Percentage of OtherComprehensiveIncomeLossNetOfTax100.099.2313.4102.1

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-12-81151-501037-35115
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value37-6-946-1
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest-299.677.0-83.085.8544.922.9

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25-141107-6-26
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest-199.6177.017.0185.8644.9122.9305.059.6

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-31
Value-8-7-10-7-10-174-14-6-14-42-4-25-10-11-37055-141005-310-21-5-4
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:OtherOperatingIncomeExpenseNet

mgm:CorporateAndReconcilingItems



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-102-109-73-88-61-66-41-50-66-89-51-37-29-41-57
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:PartnersCapitalAccountRedemptions

srt:Maximum, us-gaap:SubsequentEvent, mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-02-14
Value1400
Percentage of PartnersCapitalAccountRedemptions100.0

us-gaap:SubsequentEventType, dei:LegalEntity

us-gaap:SubsequentEvent, mgm:MGMGrowthPropertiesLimitedLiabilityCompany



Period End2020-01-14
Value1400
Percentage of PartnersCapitalAccountRedemptions0.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value000030-56411-20696332241-32-2-5-1-1210000016-15000
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00027-5341-112
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.0-6.2100.088.5100.047.0100.513.459.043.9

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value01030309-83
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.0106.2-0.011.5-0.053.0-0.586.641.056.1

us-gaap:PaymentsOfDebtIssuanceCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302012-03-312010-12-312010-09-302009-12-312009-09-30
Value901735101106040404115903200603780-113
Percentage of PaymentsOfDebtIssuanceCosts100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00090012404
Percentage of PaymentsOfDebtIssuanceCosts0.00.00.098.70.00.021.5100.0100.0100.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0172100032000
Percentage of PaymentsOfDebtIssuanceCosts0.0100.060.60.00.0100.054.60.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0013011014000
Percentage of PaymentsOfDebtIssuanceCosts0.00.039.41.3100.00.023.90.00.00.0

us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity

us-gaap:PaymentsOfDistributionsToAffiliates

mgm:MsHoPansyCatilinaChiuKing, mgm:MGMBrandingAndDevelopmentHoldingsLtd



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value555554410
Percentage of PaymentsOfDistributionsToAffiliates100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value736666686963636567626363630000
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value66666869636365676263
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsMinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value7251695546354854473049652424453022406120207167247059254197
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value44434231313029292822
Percentage of PaymentsOfDividendsMinorityInterest87.962.075.368.287.663.455.162.891.145.7

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value42213144172417227
Percentage of PaymentsOfDividendsMinorityInterest9.532.924.731.812.436.644.937.28.954.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1300000000
Percentage of PaymentsOfDividendsMinorityInterest2.65.10.00.00.00.00.00.00.00.0

us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

mgm:EmpireCity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00005350000
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.00.00.00.0100.00.00.00.00.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems, us-gaap:BusinessAcquisition

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities, mgm:EmpireCity



Period End2019-12-312019-09-302019-06-302019-03-31
Value000535
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.00.00.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value200071953002101132001117161603216213259612761451064026241164
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0071953002101
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:PreOpeningCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302011-06-302010-12-312010-09-302010-06-302009-12-312009-09-302009-06-30
Value020031846196652292115613124212116171513109534320000025109
Percentage of PreOpeningCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-09-302018-05-312018-06-302018-03-312017-12-312017-09-302017-06-302017-04-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-03-31
Value0195831211312020020001030000005411-1020110000001
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value195831212010
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0106.4100.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterHoldingsLLCAsInvestee



Period End2020-04-302019-04-302019-03-312018-09-302018-05-312017-04-302016-05-312015-04-30
Value515832113200300540200
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital0.00.0100.5100.0100.0100000.00.00.0

mgm:MGPBREITVenture



Period End2020-03-31
Value12
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital2816.9

us-gaap:ProceedsFromIssuanceOfCommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312016-12-312010-11-302010-10-31
Value5508641571000077512
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.00.00.00.00.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-31
Value5508641571
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-17-23-5-5-7-21-5-5-12-29-12-12-4-20-1-1-5-11000-1-10-1-4-100000-1000
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-100000000
Percentage of ProceedsFromPaymentsForOtherFinancingActivities-0.024.5-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-2000-1-3-1-4-4
Percentage of ProceedsFromPaymentsForOtherFinancingActivities1.741.513.90.70.129.256.311.315.932.6

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-40-41-2-1-1-1-2-110
Percentage of ProceedsFromPaymentsForOtherFinancingActivities18.9-2.2703.330.05.828.924.522.339.0-0.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-18-1-1-5-20-2-1-8-13-8
Percentage of ProceedsFromPaymentsForOtherFinancingActivities79.436.229.669.394.242.019.166.445.167.4

us-gaap:ConsolidationItems

srt:ConsolidationEliminations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00370000000
Percentage of ProceedsFromPaymentsForOtherFinancingActivities-0.0-0.0-646.8-0.0-0.0-0.0-0.0-0.0-0.0-0.0

us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ProceedsFromRealEstateAndRealEstateJointVentures

mgm:BlackstoneRealEstateIncomeTrust



Period End2019-11-15
Value4200
Percentage of ProceedsFromRealEstateAndRealEstateJointVentures100.0

us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:MGPBREITVenture, us-gaap:SubsequentEvent



Period End2020-02-14
Value2500
Percentage of ProceedsFromRealEstateAndRealEstateJointVentures0.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit



Period End2020-03-312019-03-31
Value13040
Percentage of ProceedsFromRepaymentsOfLinesOfCredit100.00.0

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1289-1923268-1690-2894641138-740380-603413971071922015-19592431694328272-13181712-2-2-1735-8773-2690-1922151016210-1837-12751457186
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorMGPSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-548-7-89-715-19760-4-8-433-8
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess28.5-2.85.3246.9-4.266.80.6-2.271.8-2.0

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-11276-1590-140-38381-78-128-2125
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess5.828.494.148.4-8.233.510.5-33.80.430.3

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value000245000000
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess-0.00.0-0.0-84.90.00.0-0.00.0-0.00.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1262200-10320521-3-658516-168296
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess65.674.40.6-110.4112.4-0.388.8136.027.871.7

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-09-302012-03-312010-12-312010-09-302009-12-312009-09-30
Value00100250000000011070007000170000706021
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mgm:NonGuarantorOtherSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value87000.0-2000.00.068000.07000.093000.00.05000.019000.078000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment13.6-0.10.019.90.068.90.02.25.5100.0

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value01002500000
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment86.4100.1100.080.1100.031.1100.097.894.50.0

us-gaap:ProvisionForDoubtfulAccounts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value21813887158963-21273-557111717148149-1013198731711111
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-06-302019-03-31
Value-1111
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-31
Value-1111
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfSecuredDebt

mgm:SeniorSecuredTermLoanA, mgm:OperatingPartnershipSeniorCreditFacility



Period End2020-02-29
Value399
Percentage of RepaymentsOfSecuredDebt100.0

mgm:SeniorSecuredTermLoanB, mgm:OperatingPartnershipSeniorCreditFacility



Period End2020-02-29
Value1300
Percentage of RepaymentsOfSecuredDebt325.8

us-gaap:RepaymentsOfSeniorDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-31
Value8462004090985000020502000759149620875000508
Percentage of RepaymentsOfSeniorDebt100.0100.0100.0100.0100.00.00.00.0100.00.0100.00.00.00.0100.0100.0100.00.0100.00.00.00.0100.0

us-gaap:BusinessAcquisition, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility

mgm:MGPBREITVenture, us-gaap:RevolvingCreditFacility, mgm:SeniorCreditFacility



Period End2020-02-14
Value1500
Percentage of RepaymentsOfSeniorDebt0.0

us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3803800002
Percentage of RepaymentsOfSeniorDebt-1.9100.04.20.00.00.00.0100.0

srt:ParentCompany, srt:ReportableLegalEntities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value204208718500000
Percentage of RepaymentsOfSeniorDebt101.90.095.8100.00.00.00.00.0

us-gaap:RestructuringCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value05242410000
Percentage of RestructuringCharges0.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability