IMKTA


Line plots across dimensions of each concept
Tables

Table of contents


us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesOutstanding
us-gaap:StatementClassOfStock
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:StatementClassOfStock
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:StatementClassOfStock
us-gaap:EarningsPerShareBasic
us-gaap:StatementClassOfStock
us-gaap:EarningsPerShareDiluted

us-gaap:Revenues
us-gaap:StatementBusinessSegments

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:InterestExpense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:StatementScenario, us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:StatementClassOfStock
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:Assets
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:LeaseContractualTerm

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent
us-gaap:LongtermDebtType

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:LeaseContractualTerm

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:IncreaseDecreaseInInventories

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:StatementBusinessSegments
imkta:IntercompanyEliminations
us-gaap:StatementClassOfStock
imkta:NumberOfVotesForCommonStockHolders

imkta:OperatingLeasesBaseRentalIncome

imkta:OperatingLeasesIncomeStatementLeaseRevenueNet

imkta:OperatingLeasesIncomeStatementOtherExpenses

imkta:ReceiptOfAdvancePaymentsOnPurchasesContracts

imkta:RecognitionOfAdvancePaymentsOnPurchasesContracts
us-gaap:DerivativeInstrumentRisk, us-gaap:LongtermDebtType
us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
us-gaap:StatementClassOfStock
us-gaap:CommonStockDividendsPerShareCashPaid
us-gaap:DebtInstrumentRedemptionPeriod
us-gaap:DebtInstrumentRedemptionPricePercentage
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType

us-gaap:DepreciationAndAmortization

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GeneralInsuranceExpense

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets
us-gaap:StatementClassOfStock
us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent
us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendsAndOtherAdjustments

us-gaap:ProceedsFromSaleOfOtherPropertyPlantAndEquipment
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
us-gaap:DerivativeInstrumentRisk
us-gaap:UnrealizedGainLossOnCashFlowHedgingInstruments
us-gaap:StatementClassOfStock
us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

us-gaap:AccountsPayableTradeCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccruedInsuranceCurrent

us-gaap:AccruedSalariesCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:DebtInstrument
us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount

us-gaap:EstimatedInsuranceRecoveries

us-gaap:InterestPayableCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue

us-gaap:OperatingLeaseLiability

us-gaap:SelfInsuranceReserve

us-gaap:SelfInsuranceReserveCurrent

us-gaap:SelfInsuranceReserveNoncurrent

Tables

  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▇▆▆▆▃▃▂▂▁0.7102180.7096680.7096490.7090240.7088670.7088670.7072690.7072690.7067650.7063020.705912
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▂▂▃▃▃▆▆▇▇█0.3027710.3033210.303340.3039650.3041220.3041220.305720.305720.3062240.3066870.307077
 us-gaap:SharesOutstanding us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassA,us-gaap:CommonStock█▇▇▆▆▆▃▃▂▂▁14.2043614.1933614.19298514.18048514.17733514.17733514.14538514.14538514.13529414.12604414.118244
 us-gaap:SharesOutstanding us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassB,us-gaap:CommonStock▁▂▂▃▃▃▆▆▇▇█6.0554166.0664166.0667916.0792916.0824416.0824416.1143916.1143916.1244826.1337326.141532
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▇▆▆▆▃▃▂▂▁14.2043614.1933614.19298514.18048514.17733514.17733514.14538514.14538514.13529414.12604414.118244
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▂▂▃▃▃▆▆▇▇█6.0554166.0664166.0667916.0792916.0824416.0824416.1143916.1143916.1244826.1337326.141532
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▇▆▆▆▃▃▂▂▁14.2043614.1933614.19298514.18048514.17733514.17733514.14538514.14538514.13529414.12604414.118244
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▂▂▃▃▃▆▆▇▇█6.0554166.0664166.0667916.0792916.0824416.0824416.1143916.1143916.1244826.1337326.141532
 us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA▄▄▄20.25977620.25977620.259776NA20.25977620.25977620.259776NA20.25977620.25977620.259776
 us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▃█6.0625266.0664866.077093NA6.0824416.1053526.114391NA6.1310046.1395446.156433
 us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock us-gaap:CommonClassA█▆▁14.1972514.1932914.182683NA14.17733514.15442414.145385NA14.12877214.12023214.103343
 us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▃█6.0625266.0664866.077093NA6.0824416.1053526.114391NA6.1310046.1395446.156433
 us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock us-gaap:CommonClassA█▅▂▃▃▂▃▂▃▁▆3.182.040.91.071.190.761.120.941.240.472.29
 us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock us-gaap:CommonClassB█▅▂▃▃▂▃▂▃▁▆2.891.860.820.971.080.691.020.851.130.432.08
 us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassA█▅▂▃▃▂▃▂▃▁▆3.11.990.871.041.160.741.090.911.210.462.23
 us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassB█▅▂▃▃▂▃▂▃▁▆2.891.860.820.971.080.691.020.851.130.432.08
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:Revenues █▆▄▄▄▂▄▄▃▁▂1189.5997561145.4820491078.3549371076.0911062.2621691001.8439291061.8371059.6881034.768578984.5621741013.786
us-gaap:CostOfGoodsAndServicesSold █▇▅▅▄▁▄▄▃864.879153853.894303820.86521815.741851803.322422757.543262803.425863803.256786790.87775NANA
us-gaap:GrossProfit █▅▃▃▃▂▃▃▂▁▂324.720603291.587746257.489727260.348258.939747244.300667258.410795256.43243.890828235.187644244.659628
us-gaap:OperatingExpenses █▆▅▅▃▃▄▄▃▂▁234.596892228.39542221.97885222.245751216.462666216.466382218.684665220.885874214.718142211.641694208.828396
us-gaap:OperatingIncomeLoss █▅▃▃▃▂▃▂▂▁▂91.46241363.30067838.47536138.63081943.35278930.74598939.46353935.60277429.77819323.55417335.888502
us-gaap:InterestExpense ▁▂▇▆▆▇█▇▇█▆9.71468110.18383911.94928611.54610511.65547511.99686312.21166111.94869511.95642112.21286511.451722
us-gaap:OtherNonoperatingIncomeExpense ▅▂▂▃▁▄█▅▅▇█0.626310.2074410.1974870.3416270.1299710.4479140.8954590.5983640.6478860.864480.95396
us-gaap:GainsLossesOnExtinguishmentOfDebt ██▁0.00.0-3.719209NANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType imkta:Loan,imkta:SeniorNotes1NA0.03.7NANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:StatementScenario,us-gaap:DebtInstrumentRedemptionPeriod,us-gaap:LongtermDebtType srt:ScenarioForecast,imkta:DebtInstrumentRedemptionPeriodSix,imkta:SeniorNotes1NANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:StatementScenario,us-gaap:DebtInstrumentRedemptionPeriod,us-gaap:LongtermDebtType srt:ScenarioForecast,us-gaap:DebtInstrumentRedemptionPeriodFive,imkta:SeniorNotes1NANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▅▂▃▃▂▃▂▂▁▂82.37404253.3242823.00435327.42634131.82728519.1970428.14733724.25244318.46965812.20578825.39074
us-gaap:IncomeTaxExpenseBenefit █▇▅▆▆▅▆▆▃▅▁19.62113.0325.3176.5098.3174.1975.9955.813-6.0142.911-19.756
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▆▁█▇▆▇▇-1.174774-10.5255342.151893-0.348444-0.798097-0.4594480.340339NANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▆▁█-1.174774-10.5255342.151893NA-0.798097-0.4594480.340339NANANANA
us-gaap:NetIncomeLoss █▅▂▃▃▂▃▂▃▁▆62.75304240.2922817.68735320.91823.51028515.0000422.15233718.43924.4836589.29478845.14674
us-gaap:ComprehensiveIncomeNetOfTax █▃▁61.57826829.76674619.839246NA22.71218814.54059222.492676NA24.4836589.29478845.14674
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementClassOfStock us-gaap:CommonClassA█▅▂▃▃▂▃▂▃▁▆45.20567429.01720312.72864715.056516.91358910.77356715.90309513.23888317.5570246.66130132.317668
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementClassOfStock us-gaap:CommonClassB█▅▂▃▃▂▃▂▃▁▆17.54736811.2750774.9587065.8608416.5966954.2264736.2492425.200566.9266342.63348712.829071
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
 Operating Margin us-gaap:StatementBusinessSegments imkta:OtherSegment▁███▇▆▆▅▄▃▅26.84533.86734.07933.62133.55231.66931.79631.01230.34829.34230.749
 Operating Margin us-gaap:StatementBusinessSegments imkta:RetailSegment█▆▄▄▃▁▃▃▂1162.7551111.6151044.2761042.471028.71970.1751030.0411028.6761004.421NANA
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:Assets █▇▅▄▃▃▃▃▂▁▁2011.1132231964.230251897.9463731867.3283681839.0333231842.4978821855.7633171824.910821810.5532591774.5758341773.661878
us-gaap:Liabilities ▇█▄▂▁▃▆▅▅▃▄1246.9619241258.4051871218.6361941204.6057621193.6279861216.5531061241.1079811229.4970121230.3278971215.5832731220.713363
us-gaap:LiabilitiesAndStockholdersEquity █▇▅▄▃▃▃▃▂▁▁2011.1132231964.230251897.9463731867.3283681839.0333231842.4978821855.7633171824.910821810.5532591774.5758341773.661878
us-gaap:StockholdersEquity █▆▅▅▄▃▃▂▂▁▁764.151299705.825063679.310179662.722606645.405337625.944776614.655336595.413808580.225362558.992561552.948515
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:AssetsCurrent █▆▂▃▂▂▃▃▃▁▁596.216736556.036557481.13355497.103371475.673303480.920198488.789488496.743116489.058453.980389455.576851
us-gaap:CashAndCashEquivalentsAtCarryingValue ██▂▃▂▁▁▁▁▁▁152.121128144.97223323.02654442.12510518.55309316.680714.09947410.53730311.6427926.93097613.755373
us-gaap:ReceivablesNetCurrent ▅█▄▂▅▃▃▁▃▃▂77.01884882.27324475.52752571.95130377.81050773.58853273.23392570.05690973.72869173.72678371.51402
us-gaap:InventoryNet ▆▁██▇▇██▇▆▆355.499657315.268498371.581621374.12906368.087914365.75519374.921644372.195421363.514581358.831862361.626877
us-gaap:OtherAssetsCurrent ▂▂▁▁▂▄▅█▇▂▁11.57710313.52258210.997868.89790311.22178924.89577626.53444543.95348340.17193614.4907688.680581
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:PropertyPlantAndEquipmentNet ▇███▇▆▇▂▂▂▁1341.4437411342.6723271345.5574791344.2673151335.1839751333.8919051341.153621303.044371297.3664111296.2640231292.455999
us-gaap:OperatingLeaseRightOfUseAsset █▁▅45.85726139.68304442.828758NANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇▄█▄█▇▄▃▁▁▃27.59548525.83832228.42658625.95768228.17604527.68577925.82020925.12333424.12884824.33142225.629028
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:LiabilitiesCurrent █▃▁▂▁▂▂▂▂▂▂428.025516294.866985235.22725247.579389231.284283248.523264254.718604260.138091249.186019250.584111252.042237
us-gaap:LongTermDebtCurrent █▂▁▁▁▁▁▁▁▁▁168.93577938.07826820.23270312.60013112.8755512.83596912.80133212.84801312.81178312.77395312.672037
us-gaap:OtherAccruedLiabilitiesCurrent ▇▂█▃▄▃▂▁▂▁█8.0718324.1155428.4181845.0258855.7623634.7187053.8626143.2403034.2963693.492178.546786
us-gaap:AccruedLiabilitiesCurrent █▇▂█▄▄▁▇▂▃▁83.91311780.85015664.85165883.64928371.56208372.70518862.504682.12476666.36895868.91194763.366998
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:LongTermDebtNoncurrent ▁▆▇▇▇▇█▇███650.34083803.977294829.812514839.637691841.836809844.633616867.130929852.73976874.944399876.109482877.868771
us-gaap:DeferredIncomeTaxLiabilitiesNet ▁▂█▆72.8973.29476.74875.499NANANA74.461NANANA
us-gaap:OtherLiabilitiesNoncurrent █▆▁▂▂▂▁▂▂▂▃55.14505851.31725939.77933141.88968241.40217441.82984440.4997542.15816141.13247941.9666843.696355
us-gaap:OperatingLeaseLiabilityNoncurrent 40.56052NANANANANANANANANANA
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:StockholdersEquity █▆▅▅▄▃▃▂▂▁▁764.151299705.825063679.310179662.722606645.405337625.944776614.655336595.413808580.225362558.992561552.948515
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▇▆▆▆▃▃▂▂▁0.7102180.7096680.7096490.7090240.7088670.7088670.7072690.7072690.7067650.7063020.705912
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▂▂▃▃▃▆▆▇▇█0.3027710.3033210.303340.3039650.3041220.3041220.305720.305720.3062240.3066870.307077
us-gaap:AdditionalPaidInCapital ▄▄▄▄▄▄▄▄▄▄▄12.31124912.31124912.31124912.31124912.31124912.31124912.31124912.31124912.31124912.31124912.311249
us-gaap:RetainedEarningsAccumulatedDeficit █▆▅▅▄▃▃▂▂▁▁761.641126702.140116665.099698650.664018632.998305612.739647600.990759582.08957566.901124545.668323539.624277
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▂█▇-10.814065-9.6392910.886243-1.26565NANANANANANANA
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃█▁▃▂▂▃▃▂▂▂53.603317159.10850916.24969166.98915636.30222944.62426763.58757653.64610239.78937930.41526337.389314
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▅▆█▁▆▆▆▃-20.124519-25.622386-25.880491-37.757393-28.098572-16.025831-70.910761-29.036344-30.382613-32.012153-56.715371
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▄▅▅▁█▁▅▅█-26.329903-11.540434-9.467761-5.659751-6.331264-26.0172110.885356-25.715247-4.69495-5.2275079.16933
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃█▁▃▂▂▃▃▂▂▂53.603317159.10850916.24969166.98915636.30222944.62426763.58757653.64610239.78937930.41526337.389314
us-gaap:NetIncomeLoss █▅▂▃▃▂▃▂▃▁▆62.75304240.2922817.68735320.91823.51028515.0000422.15233718.43924.4836589.29478845.14674
us-gaap:IncreaseDecreaseInInventories █▁▅▆▅▄▅▆▅▅▆40.231159-56.313122-2.547446.0411462.332725-9.1664552.7262238.680844.682719-2.79501412.293863
us-gaap:DeferredIncomeTaxExpenseBenefit ▅▅▅▄▅▅▆▇█▅▁-0.024-0.0530140.552014-3.471-2.2232.9474.1949.39618.142-0.183-22.812
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▅▆█▁▆▆▆▃-20.124519-25.622386-25.880491-37.757393-28.098572-16.025831-70.910761-29.036344-30.382613-32.012153-56.715371
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁▂▂▃▂▁█▂▂▂▆22.06023325.72049231.10377438.53275328.99862323.26063570.95901229.95609931.70907432.04125156.780084
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▄▅▅▁█▁▅▅█-26.329903-11.540434-9.467761-5.659751-6.331264-26.0172110.885356-25.715247-4.69495-5.2275079.16933
us-gaap:RepaymentsOfLongTermDebt ▂▁█▁▁▁▁▁▁▁▁23.0778698.256191157.4223262.4081252.3982336.9275022.3834562.3692522.3597816.8902881.84623
us-gaap:PaymentsOfDividendsCommonStock █▇▇▆▆▅▅▄▃▃▁3.2520343.2518623.2516733.2516263.2516273.2511523.2511483.2509973.2508573.2507413.250228
  2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30

None

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value710220.0709670.0709650.0709020.0708870.0708870.0707270.0707270.0706760.0706300.0705910.0704200.0703680.0703560.0698330.0698320.0697440.0697140.0697140.0696230.0690670.0688000.0677670.0677020.0675980.0673430.0672030.0671900.0650360.0648660.0647860.0647680.0646930.0646930.0646210.0646980.0646980.0644470.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value302770.0303320.0303340.0303960.0304120.0304120.0305720.0305720.0306220.0306690.0307080.0308790.0309310.0309430.0314660.0314660.0315540.0315850.0315850.0316760.0322320.0324980.0335320.0335970.0462010.0464560.0465960.0466090.0487630.0564320.0565130.0565310.0566060.0566060.0567450.0574490.0575190.0579140.0
Percentage of CommonStockValue42.642.742.742.942.942.943.243.243.343.443.543.844.044.045.145.145.245.345.345.546.747.249.549.668.369.069.369.475.087.087.287.387.587.587.888.888.989.9
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:SharesOutstanding us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonClassA, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-03-292013-09-282012-09-292011-09-24
Value14141414141414141414141414141313131313131313131313131212
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-03-292013-09-282012-09-292011-09-24
Value6.0554166.0664166.0667916.0792916.0824416.0824416.1143916.1143916.1244826.1337326.1415326.1757326.1861826.1885256.2932256.29336.3108756.316956.316956.3351256.4463256.4996936.7063436.7194439.2912399.3218011111
Percentage of SharesOutstanding42.642.742.742.942.942.943.243.243.343.443.543.844.044.045.145.145.245.345.345.546.747.249.549.669.069.487.388.8

None

us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-03-302012-12-292012-09-292012-06-232011-09-24
Value141414141414141414141414141413131313131313131313131313131212121212
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-03-302012-12-292012-09-292012-06-232011-09-24
Value6.0554166.0664166.0667916.0792916.0824416.0824416.1143916.1143916.1244826.1337326.1415326.1757326.1861826.1885256.2932256.29336.3108756.316956.316956.3351256.4463256.4996936.7063436.7194439.2401439.2912399.3191399.3218011111111111
Percentage of CommonStockSharesIssued42.642.742.742.942.942.943.243.243.343.443.543.844.044.045.145.145.245.345.345.546.747.249.549.668.369.069.369.487.087.287.387.588.8

None

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-03-302012-12-292012-09-292012-06-232011-09-24
Value141414141414141414141414141413131313131313131313131313131212121212
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-03-302012-12-292012-09-292012-06-232011-09-24
Value6.0554166.0664166.0667916.0792916.0824416.0824416.1143916.1143916.1244826.1337326.1415326.1757326.1861826.1885256.2932256.29336.3108756.316956.316956.3351256.4463256.4996936.7063436.7194439.2401439.2912399.3191399.3218011111111111
Percentage of CommonStockSharesOutstanding42.642.742.742.942.942.943.243.243.343.443.543.844.044.045.145.145.245.345.345.546.747.249.549.668.369.069.369.487.087.287.387.588.8

None

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-242011-06-25
Value20202020202020202020202020202020202022222212242424242424
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-242011-06-25
Value6.0625266.0664866.0770936.0824416.1053526.1143916.1310046.1395446.1564336.1871786.2216826.293276.3149586.316956.3328536.4827576.6066226.7168529.2501399.3035149.32025311111111111111
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding29.929.930.030.030.130.230.330.330.430.530.731.131.231.231.332.032.633.240.640.941.086.546.646.646.746.847.047.2

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-242011-06-25
Value14141414141414141414141313131313131313131312121212121212
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-242011-06-25
Value6.0625266.0664866.0770936.0824416.1053526.1143916.1310046.1395446.1564336.1871786.2216826.293276.3149586.316956.3328536.4827576.6066226.7168529.2501399.3035149.32025311111111111111
Percentage of WeightedAverageNumberOfSharesOutstandingBasic42.742.742.842.943.143.243.443.543.744.044.345.145.345.345.547.148.449.668.569.169.386.587.287.387.587.988.889.5

None

us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareBasic

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-242010-12-24
Value3.182.040.91.071.190.761.120.941.240.472.290.990.580.470.70.720.640.730.660.830.70.720.770.820.630.470.440.71-0.620.350.50.580.560.560.280.280.450.450.470.540.540.330.33
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-242010-12-24
Value2.891.860.820.971.080.691.020.851.130.432.080.90.530.420.640.650.590.660.60.750.630.660.70.740.570.430.40.65-0.560.320.450.520.510.510.260.260.410.410.430.490.490.30.3
Percentage of EarningsPerShareBasic90.991.291.190.790.890.891.190.491.191.590.890.991.489.491.490.392.290.490.990.490.091.790.990.290.591.590.991.590.391.490.089.791.191.192.992.991.191.191.590.790.790.990.9

None

us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareDiluted

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-242010-12-24
Value3.11.990.871.041.160.741.090.911.210.462.230.960.570.450.680.70.630.710.640.80.680.710.740.790.610.460.420.68-0.620.330.480.550.540.540.270.270.430.430.450.520.520.320.31
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-242010-12-24
Value2.891.860.820.971.080.691.020.851.130.432.080.90.530.420.640.650.590.660.60.750.630.660.70.740.570.430.40.65-0.560.320.450.520.510.510.260.260.410.410.430.490.490.30.3
Percentage of EarningsPerShareDiluted93.293.594.393.393.193.293.693.493.493.593.393.893.093.394.192.993.793.093.893.892.693.094.693.793.493.595.295.690.397.093.894.594.494.496.396.395.395.395.694.294.293.896.8

None

us-gaap:Revenues

us-gaap:Revenues


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
Value1189114510781076106210011061105910349841013
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:StatementBusinessSegments

imkta:Gasoline


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-24
Value84121139150155127146166165136136149129118118114120921081251290.105139137160169145142152146138130140132127
Percentage of Revenues7.110.612.914.014.712.813.815.716.013.913.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues7.110.612.914.014.712.813.815.716.013.913.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues imkta:Gasoline100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:Grocery


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-24
Value4524243783633523513753573433483633803413423603453373513583443350.348269358341341355358349344359371349346371
Percentage of Revenues38.137.135.133.833.235.135.433.733.235.435.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues38.137.135.133.833.235.135.433.733.235.435.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues imkta:Grocery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:NonFoods


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-24
Value2812602462422382232322262212082172322122012122082071982021981950.185428190186185176181180178170177177167175
Percentage of Revenues23.622.822.822.522.422.321.921.421.421.221.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues23.622.822.822.522.422.321.921.421.421.221.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues imkta:NonFoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:OtherSegment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-27
Value2633343333313131302930353535353434343434343538
Percentage of Revenues2.33.03.23.13.23.23.02.92.93.03.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues2.33.03.23.13.23.23.02.92.93.03.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues imkta:OtherSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:Perishables


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-06-232012-03-242011-12-24
Value3443042802862812672752782732612652912652482552582572482462492500.241002239238241230226231229218219218202209
Percentage of Revenues29.026.526.026.626.526.725.926.326.426.526.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues29.026.526.026.626.526.725.926.326.426.526.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues imkta:Perishables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:RetailSegment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-30
Value11621111104410421028970103010281004
Percentage of Revenues97.797.096.896.996.896.897.097.197.1
Percentage of Revenues97.797.096.896.996.896.897.097.197.1
Percentage of Revenues imkta:RetailSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-30
Value864853820815803757803803790
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues72.774.576.175.875.675.675.775.876.4

None

us-gaap:GrossProfit

us-gaap:GrossProfit


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-262011-03-242010-12-252010-12-242010-09-252010-06-26
Value3242912572602582442582562432352442612372282372372322282252282222182242202152062032102101982070.219220.2059522050.1924353930.2017282010.202422010.201341940.1946361930.19348194196
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.325.523.924.224.424.424.324.223.623.924.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value234228221222216216218220214211208220207203206204199196194193190185186184182178177178177174174184172169171172169168167167164
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues19.719.920.620.720.421.620.620.820.821.520.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value9163383843303935292335412925323131333136313337353327263132273334342330303426262832
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues7.75.53.63.64.13.13.73.42.92.43.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

imkta:OtherSegment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-30
Value2.2565.2324.2544.0324.6074.3123.8474.2813.2233.1692.9863.9614.3144.4463.1753.7423.8344.2593.8623.0193.4294.0362.5552.6283.1313.5212.0352.3032.9433.307
Percentage of OperatingIncomeLoss2.58.311.110.410.614.09.712.010.813.58.39.714.517.79.911.712.012.912.28.211.012.06.87.39.412.77.87.38.911.9
Percentage of Revenues0.20.50.40.40.40.40.40.40.30.30.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues imkta:OtherSegment8.415.412.512.013.713.612.113.810.610.89.711.112.212.49.010.711.112.311.28.710.011.46.60.00.00.00.00.00.00.0

imkta:RetailSegment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-30
Value895834343826353126
Percentage of OperatingIncomeLoss97.591.788.989.689.486.090.388.089.2
Percentage of Revenues7.55.13.23.23.62.63.43.02.6
Percentage of Revenues imkta:RetailSegment7.75.23.33.33.82.73.53.02.6

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value9.71468110111111111211111211121111111111111112101112111111111116151515141415151515151516
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.80.91.11.11.11.21.21.11.21.21.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value626310.0207440.0197490.0341630.0129970.0447910.0895460.0598360.0647890.0864480.0953960.01337200.01030200.0776320.0663140.0710480.0512360.0534100.0605840.0633250.0522880.0563970.0562760.0751980.0671320.0737860.0840000.0818120.0778320.0739700.0564190.0830940.0890740.0801780.01003600.01013000.0945420.01076100.01124900.0994530.01533500.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.00.00.00.00.00.10.10.10.10.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


None
Period End2020-06-272020-03-282019-12-282013-09-282013-06-29
Value00-3719200.00-43089000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.0100.00.0100.0
Percentage of Revenues0.00.0-0.30.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

imkta:Loan, imkta:SeniorNotes1


None
Period End2020-03-282019-12-28
Value03700000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0-99.5
Percentage of Revenues0.00.3
Percentage of Revenues imkta:Loan imkta:SeniorNotes10.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:StatementScenario, us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType

srt:ScenarioForecast, imkta:DebtInstrumentRedemptionPeriodSix, imkta:SeniorNotes1


None
Period End2020-09-26
Value1400000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of Revenues0.0
Percentage of Revenues srt:ScenarioForecast imkta:DebtInstrumentRedemptionPeriodSix imkta:SeniorNotes10.0

srt:ScenarioForecast, us-gaap:DebtInstrumentRedemptionPeriodFive, imkta:SeniorNotes1


None
Period End2020-09-26
Value2000000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of Revenues0.0
Percentage of Revenues srt:ScenarioForecast us-gaap:DebtInstrumentRedemptionPeriodFive imkta:SeniorNotes10.0

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value82532327311928241812252918142120212220242122262522161520-25.409223121820209.69807516162011111317
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.94.72.12.53.01.92.72.31.81.22.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value19135.3176.5098.3174.1975.9955.813-6.0142.911-19.756107.4384.9577.6936.5698.5188.0787.288.4767.2788.318117.6078.6296.3895.7254.863-10.9854.6516.9187.2947.6633.1865.765.5267.6854.2714.1695.276756.51475
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.61.10.50.60.80.40.60.5-0.60.3-1.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value-1174800.0-10526000.02151900.0-348440.0-798100.0-459450.0340340.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.1-0.90.2-0.0-0.1-0.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-29
Value-1174800.0-10526000.02151900.0-798100.0-459450.0340340.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.1-0.90.2-0.1-0.00.0
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-262011-03-242010-12-252010-12-242010-09-252010-06-26
Value6240172023152218249.2947884519119.1514471314121412161314151713109.53312915-14.4242238.09110.0132760.013059130.006512170.010597100.010962120.0127257.7216120.0077217.6525940.0076528.233711
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.33.51.61.92.21.52.11.72.40.94.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value62401723152218249.2947884519119.1514471314121412161314151713109.53312915-14.4242238.0901551113136.5120751010127.7216117.6525948.2337
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100003.4100.038.1100.099987.4100.0100.0100.0100.0
Percentage of Revenues5.33.51.62.21.52.11.72.40.94.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-30
Value612919221422249.29478845
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.22.61.82.11.52.12.40.94.5

None

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementClassOfStock

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value4529121516101513176.66130132138.2349656.5136989.806717108.973689109.182887119.6464689.91736610108.5273746.41745.8467948.733604-8.0810854.5136156.452237.3925757.2731953.6207985.864426.0599367.015699
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.82.51.21.41.61.11.51.21.70.73.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value17114.9587065.8608416.5966954.2264736.2492425.200566.9266342.633487125.5414063.2917412.6377494.017174.120613.6947664.1886543.7965364.8141734.1302174.3848444.6744486.6120825.3068564.0375283.6863356.828706-6.3431383.5765415.1154185.8838715.7854112.8912774.7327964.9006785.708991
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic38.838.939.038.939.039.239.339.339.539.539.740.140.040.541.040.941.241.241.342.142.844.245.160.262.262.963.078.278.579.279.379.679.579.980.780.981.4
Percentage of Revenues1.51.00.50.50.60.40.60.50.70.31.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:CommonClassB0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value20111964189718671839184218551824181017741773173317061703172416861689168116881671166516581675165616541660165316691659165316611642161216011617161815911532
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282012-12-292012-09-29
Value-2.213-3.268-1.929-2.296-2.533-1.546-1.735-2.378-1.541-1.478-1.839-2.469-1.623-1.669-1.997-2.415-1.553-1.559-1.788-2.338-1.689-1.669-2.294-2.77-2.182-2.245-2.51-2.392-2.472-2.267
Percentage of Assets-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.1-0.1-0.1
Percentage of Assets-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.1-0.1-0.1
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

imkta:OtherSegment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282012-09-29
Value173175175170177178179147140134135135133134135133132131133131233144235144370146144143158
Percentage of Assets8.68.99.29.19.79.79.78.17.87.67.67.87.87.97.87.97.97.87.97.914.08.714.18.722.48.88.78.69.6
Percentage of Assets8.68.99.29.19.79.79.78.17.87.67.67.87.87.97.87.97.97.87.97.914.08.714.18.722.48.88.78.69.6
Percentage of Assets imkta:OtherSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:RetailSegment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292018-09-292017-09-30
Value1839179217241698166316791600
Percentage of Assets91.591.290.991.090.592.092.3
Percentage of Assets91.591.290.991.090.592.092.3
Percentage of Assets imkta:RetailSegment100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:Liabilities

us-gaap:Liabilities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value12461258121812041193121612411229123012151220122212111216124312161230123112491242124912521281127412201237123712581260119912151184116411621181118611651123
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.064.164.264.564.966.066.967.468.068.568.870.571.071.472.172.172.873.274.074.375.075.576.576.973.874.574.875.476.072.573.272.172.272.673.073.373.373.3

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value20111964189718671839184218551824181017741773173317061703172416861689168116881671166516581675165616541660165316691659165316611642161216011617161815911532
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value764705679662645625614595580558552511494486480470459449438428415405394382433423416410398454445457447438436431425416412409404394381
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.035.935.835.535.134.033.132.632.031.531.229.529.028.627.927.927.226.826.025.725.024.523.523.126.225.525.224.624.027.526.827.927.827.427.026.726.70.00.026.70.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-03-292013-09-282012-09-292011-09-24
Value0.7102180.7096680.7096490.7090240.7088670.7088670.7072690.7072690.7067650.7063020.7059120.7042020.703680.7035630.6983280.6983240.6974450.6971420.6971420.6962330.6906730.6880040.6776720.6770170.6734270.6718990.6476820.646977
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-03-292013-09-282012-09-292011-09-24
Value0.3027710.3033210.303340.3039650.3041220.3041220.305720.305720.3062240.3066870.3070770.3087870.3093090.3094260.3146610.3146650.3155460.3158470.3158470.3167560.3223160.3249850.3353170.3359720.4645620.466090.5653070.574486
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value-10.814065-9.6392910.886243-1.26565-0.917206-0.1191090.340339
Percentage of StockholdersEquity-1.4-1.40.1-0.2-0.1-0.00.1
Percentage of Assets-0.5-0.50.0-0.1-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value1212121212121212121212121212121212121212121212127777777777114114114114114114116117117117117117118118
Percentage of StockholdersEquity1.61.71.81.91.92.02.02.12.12.22.22.42.52.52.62.62.72.72.82.93.03.03.13.217.818.218.518.819.425.225.625.025.526.026.227.127.528.128.428.729.130.031.0
Percentage of Assets0.60.60.60.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.74.74.64.74.64.76.96.97.07.17.17.17.27.40.00.07.70.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value761702665650632612600582566545539497481473467456445436425415402392381369355345338332320338330341332323320313306297294290285274262
Percentage of StockholdersEquity99.799.597.998.298.197.997.897.897.797.697.697.497.397.397.297.297.197.097.096.996.896.796.696.581.981.581.280.980.474.674.174.874.273.773.572.772.271.671.371.070.669.768.7
Percentage of Assets37.935.735.034.834.433.332.431.931.330.730.428.728.227.827.127.126.426.025.224.924.223.622.722.321.520.820.519.919.320.519.920.820.620.219.819.419.30.00.018.90.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value596556481497475480488496489453455445431430456418429429441432429425432413421430423434439438445426400383396389389422
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.628.325.426.625.926.126.327.227.025.625.725.725.325.326.524.825.425.626.225.925.825.725.825.025.525.925.626.026.526.526.826.024.823.924.524.124.527.6

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value152144234218161410116.93097613238.0192916.10426155.6795095.4350059.0668438.5488847.505048.6432468.6841756.2571038.6136284.0250317.3873334.625926164.552575129.4490674.683416.3074813.889429.838028126.85978523215750594.178897
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.67.41.22.31.00.90.80.60.60.40.81.40.50.40.90.30.30.50.50.40.50.50.40.50.20.40.31.00.30.70.60.30.40.20.60.80.40.00.03.80.00.00.0

None

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value7782757177737370737371666363806172708066686472606564605959646161565670566053
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.84.24.03.94.24.03.93.84.14.24.03.83.73.74.73.74.34.24.84.04.13.94.33.73.93.93.73.63.63.93.73.73.53.54.33.53.83.5

None

us-gaap:InventoryNet

us-gaap:InventoryNet


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value355315371374368365374372363358361349348348352343341340341338334337338329337333335329334330343329316301299303305286
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.716.119.620.020.019.920.220.420.120.220.420.220.420.420.420.420.220.320.220.320.120.320.219.920.420.120.319.720.220.020.720.119.618.918.518.719.218.7

None

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value1113108.8979031124264340148.6805816.26573711128.0613877.191465109.4426991119171516141525222840313130202116161619
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.70.60.50.61.41.42.42.20.80.50.40.70.70.50.40.60.60.71.21.10.91.00.90.91.51.41.72.41.91.91.91.31.31.01.01.11.3

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value13411342134513441335133313411303129712961292126512521251124712471240123112261211120712081218121812061205120712121198119912001197119311751158113310851089
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets66.768.470.972.072.672.472.371.471.773.072.973.073.473.572.374.073.473.372.772.572.572.972.773.572.972.673.072.672.272.572.372.974.073.471.670.068.271.1

None

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


None
Period End2020-06-272020-03-282019-12-28
Value453942
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0
Percentage of Assets2.32.02.3

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:LeaseContractualTerm

imkta:LeaseExtensions


None
Period End2020-06-27
Value8.0
Percentage of OperatingLeaseRightOfUseAsset17.4
Percentage of Assets0.4
Percentage of Assets imkta:LeaseExtensions0.0

None

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value2725282528272525242425222121202018191927282424242623222221151518191919202019
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.31.51.41.51.51.41.41.31.41.41.31.31.31.21.21.11.21.21.71.71.51.51.51.61.41.41.41.31.00.91.11.21.21.21.21.31.3

None

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value428294235247231248254260249250252245265240244241235231231253237231220250225227218251235295296306274280247290307318
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.315.012.413.312.613.513.714.313.814.114.214.215.514.114.214.313.913.713.715.214.314.013.115.113.613.713.215.114.217.917.818.617.017.515.318.019.320.8

None

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value16838201212121212121212123710101010101112131313121313191820495049333022347492
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.41.91.10.70.70.70.70.70.70.70.70.72.20.60.60.60.60.70.70.80.80.80.80.80.80.81.21.11.33.03.03.02.11.91.42.14.76.0

us-gaap:LongTermDebtCurrent us-gaap:LongtermDebtType

imkta:SeniorNotes1


None
Period End2020-06-27
Value150
Percentage of LongTermDebtCurrent88.8
Percentage of Assets7.5
Percentage of Assets imkta:SeniorNotes10.0

None

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-09-292012-06-232011-09-24
Value8071800.04115500.08418200.05025900.05762400.04718700.03862600.03240300.04296400.03492200.08546800.06319200.03415300.03107300.08623400.02783000.04259100.03896800.03002500.02984700.02902400.04142300.04647900.03349200.04958000.04612100.03139500.04264600.03529800.04002400.03312400.04219100.04209400.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.20.40.30.30.30.20.20.20.20.50.40.20.20.50.20.30.20.20.20.20.20.30.20.30.30.20.30.20.20.20.30.3

None

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282012-09-29
Value8380648371726282666863826164607662645374596053705861487292
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.24.13.44.53.93.93.44.53.73.93.64.83.63.83.54.53.73.93.24.53.63.63.24.33.53.73.04.35.6

None

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value650803829839841844867852874876877865833866890866887896913882904914956924895897905893913810826785812803859820782725
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.340.943.745.045.845.846.746.748.349.449.549.948.950.951.651.452.553.354.152.854.355.257.155.854.154.054.853.555.149.049.847.850.450.253.250.749.247.3

None

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


None
Period End2020-06-272020-03-282019-12-282019-09-282018-09-29
Value7273767574
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0
Percentage of Assets3.63.74.04.04.1

None

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value5551394141414042414143414038373635353534343229282828282726109.7082629.1831538.1987629.43057.7073737.2255037.6495996.776391
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.62.12.22.32.32.22.32.32.42.52.42.42.32.22.22.12.12.12.12.12.01.81.71.71.71.71.71.60.60.60.60.50.60.50.40.50.4

None

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


None
Period End2020-06-27
Value40
Percentage of OperatingLeaseLiabilityNoncurrent100.0
Percentage of Assets2.0

us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:LeaseContractualTerm

imkta:LeaseExtensions


None
Period End2020-06-27
Value8.0
Percentage of OperatingLeaseLiabilityNoncurrent19.7
Percentage of Assets0.4
Percentage of Assets imkta:LeaseExtensions0.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value764705679662645625614595580558552511494486480470459449438428415405394382433423416410398454445457447438436431425416412409404394381
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.035.935.835.535.134.033.132.632.031.531.229.529.028.627.927.927.226.826.025.725.024.523.523.126.225.525.224.624.027.526.827.927.827.427.026.726.70.00.026.70.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-03-292013-09-282012-09-292011-09-24
Value0.7102180.7096680.7096490.7090240.7088670.7088670.7072690.7072690.7067650.7063020.7059120.7042020.703680.7035630.6983280.6983240.6974450.6971420.6971420.6962330.6906730.6880040.6776720.6770170.6734270.6718990.6476820.646977
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-03-292013-09-282012-09-292011-09-24
Value0.3027710.3033210.303340.3039650.3041220.3041220.305720.305720.3062240.3066870.3070770.3087870.3093090.3094260.3146610.3146650.3155460.3158470.3158470.3167560.3223160.3249850.3353170.3359720.4645620.466090.5653070.574486
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value-10.814065-9.6392910.886243-1.26565-0.917206-0.1191090.340339
Percentage of StockholdersEquity-1.4-1.40.1-0.2-0.1-0.00.1
Percentage of Assets-0.5-0.50.0-0.1-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value1212121212121212121212121212121212121212121212127777777777114114114114114114116117117117117117118118
Percentage of StockholdersEquity1.61.71.81.91.92.02.02.12.12.22.22.42.52.52.62.62.72.72.82.93.03.03.13.217.818.218.518.819.425.225.625.025.526.026.227.127.528.128.428.729.130.031.0
Percentage of Assets0.60.60.60.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.74.74.64.74.64.76.96.97.07.17.17.17.27.40.00.07.70.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-09-262008-09-27
Value761702665650632612600582566545539497481473467456445436425415402392381369355345338332320338330341332323320313306297294290285274262
Percentage of StockholdersEquity99.799.597.998.298.197.997.897.897.797.697.697.497.397.397.297.297.197.097.096.996.896.796.696.581.981.581.280.980.474.674.174.874.273.773.572.772.271.671.371.070.669.768.7
Percentage of Assets37.935.735.034.834.433.332.431.931.330.730.428.728.227.827.127.126.426.025.224.924.223.622.722.321.520.820.519.919.320.519.920.820.620.219.819.419.30.00.018.90.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value710220.0709670.0709650.0709020.0708870.0708870.0707270.0707270.0706760.0706300.0705910.0704200.0703680.0703560.0698330.0698320.0697440.0697140.0697140.0696230.0690670.0688000.0677670.0677020.0675980.0673430.0672030.0671900.0650360.0648660.0647860.0647680.0646930.0646930.0646210.0646980.0646980.0644470.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value302770.0303320.0303340.0303960.0304120.0304120.0305720.0305720.0306220.0306690.0307080.0308790.0309310.0309430.0314660.0314660.0315540.0315850.0315850.0316760.0322320.0324980.0335320.0335970.0462010.0464560.0465960.0466090.0487630.0564320.0565130.0565310.0566060.0566060.0567450.0574490.0575190.0579140.0
Percentage of CommonStockValue42.642.742.742.942.942.943.243.243.343.443.543.844.044.045.145.145.245.345.345.546.747.249.549.668.369.069.369.475.087.087.287.387.587.587.888.888.989.9
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value1212121212121212121212121212121212121212121212127777777777114114114114114114116117117
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.60.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.74.74.64.74.64.76.96.97.07.17.17.17.27.47.7

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value761702665650632612600582566545539497481473467456445436425415402392381369355345338332320338330341332323320313306290
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.935.735.034.834.433.332.431.931.330.730.428.728.227.827.127.126.426.025.224.924.223.622.722.321.520.820.519.919.320.519.920.820.620.219.819.419.318.9

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-272020-03-282019-12-282019-09-28
Value-10814000.0-9639300.0886240.0-1265600.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0
Percentage of Assets-0.5-0.50.0-0.1

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value531591666364463533930374941481723419.526212633750-5.3240694811667.3708992326272046
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.513.91.56.23.44.56.05.13.83.13.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-20125000.0-25622000.0-25880000.0-37757000.0-28099000.0-16026000.0-70911000.0-29036000.0-30383000.0-32012000.0-56715000.0-37500000.0-29961000.0-29989000.0-27910000.0-21180000.0-20928000.0-30710000.0-24600000.0-29677000.0-11459000.0-27908000.0-35742000.0-17515000.0-19214000.0-31091000.0-11439000.0-20283000.0-112750000.0-19617000.0-27251000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1.7-2.2-2.4-3.5-2.6-1.6-6.7-2.7-2.9-3.3-5.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-26.329903-11.540434-9.467761-5.659751-6.331264-26.0172110-25.715247-4.69495-5.2275079.169333.700121-9.316531-27.32577520-5.447961-17.5343728.965291-26.253609-14.984599-36.15579837-14.7349018.760124-53.08937721-6.047089-22.35885587-37.415627-11.941975
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.2-1.0-0.9-0.5-0.6-2.61.0-2.4-0.5-0.50.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value531591666364463533930374941481723419.526212633750-5.3240694811667.3708992326272046
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.513.91.56.23.44.56.05.13.83.13.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-292012-06-232012-03-292012-03-242011-12-292011-12-242011-09-242011-06-252011-06-242011-03-262011-03-242010-12-252010-12-242010-09-252010-06-26
Value6240172023152218249.2947884519119.1514471314121412161314151713109.53312915-14.4242238.09110.0132760.013059130.006512170.010597100.010962120.0127257.7216120.0077217.6525940.0076528.233711
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.33.51.61.92.21.52.11.72.40.94.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value62401723152218249.2947884519119.1514471314121412161314151713109.53312915-14.4242238.0901551113136.5120751010127.7216117.6525948.2337
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100003.4100.038.1100.099987.4100.0100.0100.0100.0
Percentage of Revenues5.33.51.62.21.52.11.72.40.94.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value40-56.313122-2.547446.0411462.332725-9.1664552.7262238.680844.682719-2.795014121.0484220.216885-4.5287358.7153642.0350010.965832-0.3957342.631853.722972-2.135227-1.2643728.797151-7.5603633.660696-1.6259535.357968-4.8532814.289578-12.9934441313142.804704-3.990029-2.2162659.802145.9099093.2399512.806576
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value-0.024-0.0530140.552014-3.471-2.2232.9474.1949.39618-0.183-22.812-1.6190.124-0.017-0.019-0.5163.674-0.5784.226-0.953-0.647-1.1724.997-0.99-12.091-1.655-1.6166.9561.7570.003-1.281130.7682.057-2.275-0.007-2.406-1.675-1.8643.412752.91675
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-20125000.0-25622000.0-25880000.0-37757000.0-28099000.0-16026000.0-70911000.0-29036000.0-30383000.0-32012000.0-56715000.0-37500000.0-29961000.0-29989000.0-27910000.0-21180000.0-20928000.0-30710000.0-24600000.0-29677000.0-11459000.0-27908000.0-35742000.0-17515000.0-19214000.0-31091000.0-11439000.0-20283000.0-112750000.0-19617000.0-27251000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1.7-2.2-2.4-3.5-2.6-1.6-6.7-2.7-2.9-3.3-5.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value22253138282370293132563730302929363040302916273521203024291828354139633420172526
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-26.329903-11.540434-9.467761-5.659751-6.331264-26.0172110-25.715247-4.69495-5.2275079.169333.700121-9.316531-27.32577520-5.447961-17.5343728.965291-26.253609-14.984599-36.15579837-14.7349018.760124-53.08937721-6.047089-22.35885587-37.415627-11.941975
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.2-1.0-0.9-0.5-0.6-2.61.0-2.4-0.5-0.50.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value238.2561911572.4081252.3982336.9275022.3834562.3692522.3597816.8902881.84623491.6762226.2377071.59469202.0123936.5447292.0136861.9965351.9852226.515591.9695581.9520651.831284131.854428185782.154892.882864317.4068294.8441492039188.63255338.077484
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value3.2520343.2518623.2516733.2516263.2516273.2511523.2511483.2509973.2508573.2507413.2502283.2500723.2500353.2486163.2484643.24823.2481153.2481043.2478373.2461813.2453683.2422693.2430723.6157623.6166773.6155763.6155473.6116263.833566193.8332723.8330463.8330473.8348253.8584833.8605833.8598523.8598493.8641813.864491
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-09-302016-09-24
Value152144234218161410116.930976235.679509
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:IntercompanyEliminations us-gaap:StatementBusinessSegments

imkta:IntercompanyEliminations

imkta:FluidDairy


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value11121110101011109.710111210111110101111111112141414151414131415151314151514
Percentage of IntercompanyEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

imkta:NumberOfVotesForCommonStockHolders us-gaap:StatementClassOfStock

imkta:NumberOfVotesForCommonStockHolders

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-29
Value001.0001.0001.0001.0001.0001.0001.0001.0
Percentage of NumberOfVotesForCommonStockHolders0.00.0100.00.00.0100.00.00.0100.00.00.0100.00.00.0100.00.00.0100.00.00.0100.00.00.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-29
Value0010.00010.00010.00010.00010.00010.00010.00010.0
Percentage of NumberOfVotesForCommonStockHolders0.00.01000.00.00.01000.00.00.01000.00.00.01000.00.00.01000.00.00.01000.00.00.01000.00.00.01000.0

imkta:OperatingLeasesBaseRentalIncome

imkta:OperatingLeasesBaseRentalIncome


None
Period End2020-06-272020-03-28
Value1848400.04144300.0
Percentage of OperatingLeasesBaseRentalIncome100.0100.0

imkta:OperatingLeasesIncomeStatementLeaseRevenueNet

imkta:OperatingLeasesIncomeStatementLeaseRevenueNet


None
Period End2020-06-272020-03-28
Value-164040.01985300.0
Percentage of OperatingLeasesIncomeStatementLeaseRevenueNet100.0100.0

imkta:OperatingLeasesIncomeStatementOtherExpenses

imkta:OperatingLeasesIncomeStatementOtherExpenses


None
Period End2020-06-272020-03-28
Value753130.0899760.0
Percentage of OperatingLeasesIncomeStatementOtherExpenses100.0100.0

imkta:ReceiptOfAdvancePaymentsOnPurchasesContracts

imkta:ReceiptOfAdvancePaymentsOnPurchasesContracts


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value1306500.00500000.001284000.001000000.00938130.0170000.01000000.002566900.0170000.01000000.00695890.01500000.01000000.0521110.042500.02423000.01095200.0458820.02204.01766500.0750000.0500000.0200000.01756500.01259200.01033100.0600000.01626600.0750000.0500000.01389600.0575000.0750000.00
Percentage of ReceiptOfAdvancePaymentsOnPurchasesContracts100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

imkta:RecognitionOfAdvancePaymentsOnPurchasesContracts

imkta:RecognitionOfAdvancePaymentsOnPurchasesContracts


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-2019800.0-439820.0-870020.0-639100.0-637640.0-632890.0-632890.0-632890.0-547090.0-499330.0-498750.0-457080.0-453660.0-445720.0-820160.0-820160.0-820300.0-817350.0-817350.0-904200.0-923710.0-1336600.0-962060.0-827590.0-822930.0-816240.0-816010.0-816010.0-878510.0-880640.0-873390.0-830220.0-743960.0-744140.0-900000.0-900000.0-746970.0-671610.0-671610.0-671610.0
Percentage of RecognitionOfAdvancePaymentsOnPurchasesContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DerivativeInstrumentRisk, us-gaap:LongtermDebtType

us-gaap:AmortizationOfDebtDiscountPremium

imkta:InterestRateSwapTwo, us-gaap:SecuredDebt


None
Period End2020-06-272020-03-282019-12-28
Value00650000.0
Percentage of AmortizationOfDebtDiscountPremium0.00.0100.0

us-gaap:InterestRateSwap, us-gaap:SecuredDebt


None
Period End2020-06-272020-03-282019-12-28
Value00500000.0
Percentage of AmortizationOfDebtDiscountPremium0.00.076.9

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-30
Value7.148895121-19.098561231.8723932.5812263.562171-1.1054894.711816
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid us-gaap:StatementClassOfStock

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-10-172019-12-282019-09-282019-06-292019-03-302018-10-182018-12-292018-09-292018-06-302018-03-312017-10-192017-12-302017-09-302017-06-242017-03-252016-10-142016-12-242016-09-242016-06-252016-03-262015-10-222015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-10-242013-12-282013-09-282013-04-252013-06-292013-03-302012-12-312012-12-292012-10-25
Value0.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.1650.16500.1650.990.165
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-10-172019-12-282019-09-282019-06-292019-03-302018-10-182018-12-292018-09-292018-06-302018-03-312017-10-192017-12-302017-09-302017-06-242017-03-252016-10-142016-12-242016-09-242016-06-252016-03-262015-10-222015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-10-242013-12-282013-09-282013-04-252013-06-292013-03-302012-12-312012-12-292012-10-25
Value0.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.150.1500.150.90.15
Percentage of CommonStockDividendsPerShareCashPaid90.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.990.90.090.990.990.9

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrumentRedemptionPeriod

us-gaap:DebtInstrumentRedemptionPricePercentage

us-gaap:DebtInstrumentRedemptionPeriodFour


None
Period End2020-06-272020-03-282019-12-282018-12-29
Value001.01.0
Percentage of DebtInstrumentRedemptionPricePercentage0.00.0100.0100.0

us-gaap:DebtInstrumentRedemptionPeriodOne


None
Period End2020-06-272020-03-282019-12-282018-12-29
Value001.02881.0288
Percentage of DebtInstrumentRedemptionPricePercentage0.00.0102.9102.9

us-gaap:DebtInstrumentRedemptionPeriodThree


None
Period End2020-06-272020-03-282019-12-282018-12-29
Value001.00961.0096
Percentage of DebtInstrumentRedemptionPricePercentage0.00.0101.0101.0

us-gaap:DebtInstrumentRedemptionPeriodTwo


None
Period End2020-06-272020-03-282019-12-282018-12-29
Value001.01921.0192
Percentage of DebtInstrumentRedemptionPricePercentage0.00.0101.9101.9

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

imkta:DebtInstrumentRedemptionPeriodSix, imkta:SeniorNotes1, us-gaap:SubsequentEvent


None
Period End2020-07-31
Value1.0096
Percentage of DebtInstrumentRedemptionPricePercentage0.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:LongtermDebtType

imkta:SeniorNotes1


None
Period End2020-03-282019-12-28
Value01.0192
Percentage of DebtInstrumentRedemptionPricePercentage0.0101.9

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value28282828272727282828272827272727262625262525252424242323232323232221222121212020
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-25
Value3.2520323.2518623.2516733.2516273.2511523.2511483.2508573.2507423.2502283.2500353.2486163.2484643.2481153.2481043.2478373.2453683.2422693.2430723.6166773.6155763.6155473.8335661e-06223.8330463.8330473.8348253.8584833.8605833.8598523.8598493.864181
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-25
Value3.2520323.2518623.2516733.2516273.2511523.2511483.2508573.2507423.2502283.2500353.2486163.2484643.2481153.2481043.2478373.2453683.2422693.2430723.6166773.6155763.6155473.8335661e-06223.8330463.8330473.8348253.8584833.8605833.8598523.8598493.864181
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:ExtinguishmentOfDebtAmount

imkta:DebtInstrumentRedemptionPeriodSix, imkta:SeniorNotes1, us-gaap:SubsequentEvent


None
Period End2020-07-31
Value100
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnDispositionOfAssets


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value1338700.0108350.02964500.0527570.0875710.02911700.0-262590.057386.0605510.08223.057270.0-28409.0125030.0-10139.01378100.0-274510.0-1555200.0557410.063731.01870900.0-318660.0521220.0117780.0-310150.0927850.083283.0124870.023890.062172.04054100.0121550.0-10268.0514420.0151170.014704.0-981.02655900.09463.011299.08176.0129570.0
Percentage of GainLossOnDispositionOfAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GeneralInsuranceExpense

us-gaap:GeneralInsuranceExpense


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value9.47.810107.39.410108.1108.68.78.07.19.37.77.710.09.27.69.68.67.67.48.03.56.26.96.79.38.58.07.97.47.36.98.0
Percentage of GeneralInsuranceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-5.2543966.745723.576221-5.859194.2219760.3546073.177016-3.6717820.0019082.2127635.1848562.822261-0.037103-17.13819318-10.7732862.020368-10.12497314-2.282593.246371-7.74403810-3.9002380.3378274.4088750.585427-0.03439-4.7377743.251563-0.068994.6999270.681678-14.00644413-0.372571.764567-4.5846296.9527890.07204
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-1.14628743-27.97029517-19.370587-5.679893-2.3617787.853447-0.876611-2.6487729.8598033.410685-0.69042-4.5873076.4521164.6932984.321448-1.723144-19.921052167.81250414-29.63204127-6.34769413-21.3114177.760706-7.26859113-25.69921425-9.86200229-13.405644-11.3366313.3675886.1072653.81099823
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value-0.1883192.7853351.719985-4.145989-13.1837220.700678-17.0600044.7977254.512585.760061-4.647487-0.5887145.5186511.28422-1.6471980.101511-2.006085-0.0841772.0023212.865457-0.6798140.997523-0.166064-8.8860663.064871-5.129577-4.5118529.7834140.8978230.2339139.571352-0.0808015.0811710.190340.355066-4.4773964.528238-0.1165485.87691
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAttributableToParentDiluted us-gaap:StatementClassOfStock

us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value6240172023152218249.2947884519119.1514471314121412161314151713109.53312915-8.0810858.0901561113136.512075101012
Percentage of NetIncomeLossAttributableToParentDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value17114.9587065.8608416.5966954.2264736.2492425.200566.9266342.633487125.5414063.2917412.6377494.017174.120613.6947664.1886543.7965364.8141734.1302174.3848444.6744486.6120825.3068564.0375283.6863356.828706-6.3431383.5765415.1154185.8838715.7854112.8912774.7327964.9006785.708991
Percentage of NetIncomeLossAttributableToParentDiluted28.028.028.028.028.128.228.228.228.328.328.428.628.628.829.129.129.229.229.329.730.030.731.137.638.438.638.743.978.544.244.244.344.344.444.744.744.9

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


None
Period End2020-06-272020-03-28
Value2400000.02300000.0
Percentage of OperatingLeaseCost100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue


None
Period End2020-06-272020-03-28
Value1.9180674.213984
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value-1.554774-13.9265342.848879-0.48315-1.036759-0.5987640.444037
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent us-gaap:DerivativeInstrumentRisk

us-gaap:InterestRateSwap


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value1.2100.90.40.80.8
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent-77.2-75.431.6-82.8-77.2-133.6

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-29
Value-380000.0-3401000.0-696990.0-238660.0-139320.0-103700.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockDividendsAndOtherAdjustments us-gaap:StatementClassOfStock

us-gaap:PreferredStockDividendsAndOtherAdjustments

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-25
Value-17.547368-11.275077-4.958706-5.860841-6.596695-4.226473-6.249242-5.20056-6.926634-2.633487-12.829071-5.541406-3.291741-2.637749-4.01717-4.12061-3.694766-4.188654-3.796536-4.814173-4.130217-4.384844-4.674448-6.612082-5.306856-4.037528-3.686335-6.8287066.366259-3.576541-5.1154185.8838715.785411-2.891277-4.7327964.9006785.708991
Percentage of PreferredStockDividendsAndOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfOtherPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfOtherPropertyPlantAndEquipment


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252011-03-262010-12-252010-09-25
Value1935700.098106.05223300.0775360.0900050.07234800.048251.0919760.01326500.029098.064713.0185090.0669330.0112500.01368800.072049.042988.0592360.051133.03151400.0550260.0506360.0168020.0155900.077362.070685.0130120.076796.053128.07507600.0171850.01.0651990.0673800.011248.03038100.0-24800.088228.048132.0-2.0
Percentage of ProceedsFromSaleOfOtherPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities

us-gaap:CommonClassA, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-03-302018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-27
Value11000.0375.012500.031950.010091.09250.07800.034200.010450.02343.0104700.075.017575.06075.0018175.0111200.053368.0206650.013100.0
Percentage of StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-03-302018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-27
Value-11000.0-375.0-12500.0-31950.0-10091.0-9250.0-7800.0-34200.0-10450.0-2343.0-104700.0-75.0-17575.0-6075.00-18175.0-111200.0-53368.0-206650.0-13100.0
Percentage of StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.00.0-100.0-100.0-100.0-100.0-100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

us-gaap:CommonClassA, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-03-302018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-27
Value550.019.0625.01598.0504.0463.0390.01710.0522.0117.05235.04.0879.0303.00909.05560.02669.010332.0655.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB, us-gaap:CommonStock


None
Period End2020-06-272020-03-282019-12-282019-03-302018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-27
Value-550.0-19.0-625.0-1598.0-504.0-463.0-390.0-1710.0-522.0-117.0-5235.0-4.0-879.0-303.00-909.0-5560.0-2669.0-10332.0-655.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.00.0-100.0-100.0-100.0-100.0-100.0

us-gaap:UnrealizedGainLossOnCashFlowHedgingInstruments us-gaap:DerivativeInstrumentRisk

us-gaap:UnrealizedGainLossOnCashFlowHedgingInstruments

us-gaap:InterestRateSwap


None
Period End2020-06-272019-06-29
Value1.51.1
Percentage of UnrealizedGainLossOnCashFlowHedgingInstruments100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:CommonClassA


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-292018-06-302018-03-312017-12-302017-06-242017-03-252016-12-242016-06-252016-03-262015-12-262015-06-272015-03-282014-12-272014-06-282014-03-292013-12-282013-03-302012-12-292012-06-232012-03-242011-12-242011-06-25
Value6.0625266.0664866.0770936.0824416.1053526.1143916.1310046.1395446.1564336.1871786.2216826.293276.3149586.316956.3328536.4827576.6066226.7168529.2501399.3035149.320253111111111111
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA


None
Period End2020-08-042020-05-052020-02-042019-12-052019-08-062019-05-062019-02-052018-12-042018-08-072018-05-072018-02-062017-12-042017-07-312017-05-012017-01-312016-12-142016-08-012016-05-032016-02-022015-12-072015-08-032015-05-042015-02-032014-12-122014-08-062014-05-052014-02-032013-12-112013-08-022013-05-062013-02-042012-12-202012-07-302012-05-02
Value14141414141414141414141414141413131313131313131313131313131212121212
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


None
Period End2020-08-042020-05-052020-02-042019-12-052019-08-062019-05-062019-02-052018-12-042018-08-072018-05-072018-02-062017-12-042017-07-312017-05-012017-01-312016-12-142016-08-012016-05-032016-02-022015-12-072015-08-032015-05-042015-02-032014-12-122014-08-062014-05-052014-02-032013-12-112013-08-022013-05-062013-02-042012-12-202012-07-302012-05-02
Value6.0554166.0634166.0664166.0792916.0824416.0824416.1137166.1143916.1244826.1322326.1415326.1457326.1861826.1879826.1932256.2932256.30086.316956.316956.334456.4424256.49886.7055186.7063439.2401439.2457939.3001399.3191399.4425511111111111
Percentage of EntityCommonStockSharesOutstanding42.642.742.742.942.942.943.243.243.343.443.543.544.044.044.045.145.145.345.345.546.647.249.549.568.368.469.169.370.987.087.287.287.587.5

us-gaap:AccountsPayableTradeCurrent

us-gaap:AccountsPayableTradeCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232012-03-242011-12-242011-09-242011-06-252010-09-25
Value167168141151146162179165170168176150167165173155162155166166163157152167153151150160155161156163165171152166155141
Percentage of AccountsPayableTradeCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232011-09-24
Value18161420201416221813142115111218151112171410111613119.89853416151112181315
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedInsuranceCurrent

us-gaap:AccruedInsuranceCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232011-09-24
Value13131313121313131313131313131414131414141411121213121212132727262624
Percentage of AccruedInsuranceCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalariesCurrent

us-gaap:AccruedSalariesCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232011-09-24
Value40352531292624292725232826242328262321262422222523212125232119252324
Percentage of AccruedSalariesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-03-302012-12-292012-09-292012-06-232011-09-242010-09-25
Value325000.0325000.0156000.0156140.0380000.0104410.0104000.0433360.0293000.0293000.0306000.0305580.0508000.0358000.0358000.0358290.0540000.0540000.0400000.0400250.0606000.0527000.0387000.0307030.0763000.0764000.0764000.0722890.0742000.0742000.0741690.0722000.0524460.0596220.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentCarryingAmount

imkta:FacilityBonds


None
Period End2020-06-272010-12-31
Value6899
Percentage of DebtInstrumentCarryingAmount100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

imkta:SeniorNotes1


None
Period End2020-06-27
Value295
Percentage of DebtInstrumentCarryingAmount433.8

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure, imkta:NonQualifiedRetirementPlan


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-29
Value151316151413
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, imkta:NonQualifiedRetirementPlan


None
Period End2020-06-272020-03-282019-12-282019-06-292019-03-302018-12-29
Value151316151413
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:DerivativeAssets

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure, imkta:InterestRateSwapDerivativeContract


None
Period End2020-06-272020-03-282019-12-28
Value14121.174
Percentage of DerivativeAssets100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, imkta:InterestRateSwapDerivativeContract


None
Period End2020-06-272020-03-282019-12-28
Value14121.174
Percentage of DerivativeAssets100.0100.0100.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

imkta:InterestRateSwapTwo


None
Period End2020-06-272020-03-282019-12-28
Value149151153
Percentage of DerivativeNotionalAmount100.0100.0100.0

us-gaap:InterestRateSwap


None
Period End2020-06-272020-03-282019-12-282017-12-31
Value44454658
Percentage of DerivativeNotionalAmount29.430.030.40.0

us-gaap:EstimatedInsuranceRecoveries

us-gaap:EstimatedInsuranceRecoveries


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252015-09-26
Value4800000.05400000.03700000.03600000.03600000.03900000.04400000.04600000.04800000.05400000.06600000.04800000.05100000.05000000.04800000.04800000.04200000.04900000.0
Percentage of EstimatedInsuranceRecoveries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-232011-09-24
Value2.978914112.940653133.323478133.59344133.506514133.247752132.380892122.35085122.568031122.600206122.593078122.753778122.595268122.555924122.918049197.079868196.93104320
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure, imkta:FacilityBonds


None
Period End2020-06-272020-03-282019-12-282019-09-282018-12-292018-09-292017-12-302017-09-302016-12-242015-12-262015-09-262014-12-272014-09-27
Value68687272777781818690909595
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure, imkta:SecuredNotesPayableAndOther


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-26
Value20622923279828486889092949686878990899193
Percentage of LongTermDebtFairValue303.2336.7320.4109.80.00.0112.0114.80.00.0116.0117.90.00.0103.40.00.00.0102.8

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-28
Value5455455457007007007007007007007007007007007007007007007007007007007007000.7700700700
Percentage of LongTermDebtFairValue801.1801.1751.1964.70.00.0908.0908.00.00.0857.6857.60.00.0812.50.00.00.0771.9771.90.00.0735.2735.20.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, imkta:FacilityBonds


None
Period End2020-06-272020-03-282019-12-282019-09-282018-12-292018-09-292017-12-302017-09-302016-12-242015-12-262015-09-262014-12-272014-09-27
Value68687272777781818690909595
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, imkta:SecuredNotesPayableAndOther


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-26
Value20622923279828486889092949686878990899193
Percentage of LongTermDebtFairValue303.2336.7320.4109.80.00.0112.0114.80.00.0116.0117.90.00.0103.40.00.00.0102.8

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-28
Value5465175547147087136867106916967006826867007157227017106997197127227037050.70875703684675
Percentage of LongTermDebtFairValue803.1760.1764.2985.20.00.0889.9921.70.00.0857.6836.20.00.0830.80.00.00.0771.0793.20.00.0738.9740.70.00.00.00.0

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


None
Period End2020-06-272020-03-282019-12-28
Value484245
Percentage of OperatingLeaseLiability100.0100.0100.0

us-gaap:SelfInsuranceReserve

us-gaap:SelfInsuranceReserve


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-09-262014-09-272013-09-282012-09-292011-09-24
Value3333323131333434343537353535363535353629292624
Percentage of SelfInsuranceReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SelfInsuranceReserveCurrent

us-gaap:SelfInsuranceReserveCurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-09-26
Value13131313121313131313131313131414131414
Percentage of SelfInsuranceReserveCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SelfInsuranceReserveNoncurrent

us-gaap:SelfInsuranceReserveNoncurrent


None
Period End2020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-242016-09-242016-06-252016-03-262015-09-26
Value19201817182020212121232122222221212121
Percentage of SelfInsuranceReserveNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:SharesOutstanding
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
None
us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:CommonStockSharesOutstanding
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:EarningsPerShareBasic
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:EarningsPerShareDiluted
us-gaap:StatementClassOfStock
(None,)
None
us-gaap:Revenues
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:StatementClassOfStock
(None,)
None
Operating Margin
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
None
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
(None,)
None