MGM


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostsAndExpenses

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:LongtermDebtType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

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

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:LitigationSettlementExpense

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

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

us-gaap:Revenues
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets
dei:LegalEntity
dei:LegalEntity
us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetExcludingGoodwill

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

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:Subsegments

us-gaap:OtherAssetsNoncurrent

us-gaap:EquitySecuritiesFvNi

us-gaap:AccountsPayableCurrent
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:DividendsPayableCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:MinorityInterest
dei:LegalEntity, us-gaap:BalanceSheetLocation
us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:Subsegments

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

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

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet
us-gaap:IncomeTaxAuthority

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

us-gaap:LitigationReserveCurrent

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

mgm:AdjustmentRelatedToRedeemableNoncontrollingInterests
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
mgm:AnnualRentEscalatingFromYearOneThroughYearTen
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:AnnualRentEscalatorAfterYearFifteen
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
mgm:AnnualRentEscalatorAfterYearTen
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
mgm:AnnualRentEscalatorAfterYearTwenty
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:AnnualRentEscalatorCapAfterYearFifteen
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
mgm:AnnualRentEscalatorCapAfterYearTen
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
mgm:AnnualRentEscalatorCapFromYearElevenThroughYearTwenty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
mgm:AnnualRentEscalatorFromYearElevenThroughYearTwenty
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:AnnualRentEscalatorFromYearOneThroughYearFifteen
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
mgm:AnnualRentEscalatorFromYearOneThroughYearTen
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
mgm:BusinessCombinationRetainingOwnershipInterest
us-gaap:StatementEquityComponents
mgm:ChangeInAccumulatedOtherComprehensiveIncomeLoss
us-gaap:ProductOrService
mgm:ChangeInContractAndContractRelatedLiabilities
us-gaap:StatementEquityComponents
mgm:ChangesInAccumulatedOtherComprehensiveIncomeLossRedemptionOfOperatingPartnershipUnits

mgm:CommissionsComplimentariesAndOtherIncentives
us-gaap:BusinessAcquisition
mgm:ComplementaryTaxRate
us-gaap:BusinessAcquisition, us-gaap:IncomeTaxAuthority
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:ContributionsToUnconsolidatedAffiliates

mgm:CorporateIncomeExpense
us-gaap:LongtermDebtType, us-gaap:StatementScenario
mgm:DebtInstrumentScheduledAmortizationPaymentsBeginningOnLastDayOfEachCalendarQuarterFromSpecifiedPeriodAsPercentageOfOriginalPrincipalBalance
us-gaap:IncomeTaxAuthority
mgm:DecreaseInForeignTaxCreditCarryForwardValuationAllowance
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss

mgm:FinanceLeaseCost

mgm:FinanceLeaseInterestExpenseCredit
us-gaap:TypeOfArrangement
mgm:FixedAnnualRent
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences

mgm:GainRelatedToSaleOfHarmonLandUnconsolidatedAffiliate

mgm:IncomeLossFromUnconsolidatedAffiliates
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:IncomeLossFromUnconsolidatedAffiliatesRelatedToRealEstateVentures
us-gaap:IncomeTaxAuthority
mgm:IncreaseInForeignTaxCreditCarryForwardValuationAllowance
dei:LegalEntity, us-gaap:CapitalUnitsByClass
mgm:IssuanceOfOperatingPartnershipUnits
dei:LegalEntity, us-gaap:StatementEquityComponents
mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

mgm:NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted

mgm:NonOperatingItemsFromUnconsolidatedAffiliates

mgm:NoncashLeaseExpense
dei:LegalEntity, us-gaap:Ownership
mgm:OperatingPartnershipRedemptionUnitsForClassAOffering
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
mgm:OperatingPartnershipUnitsReceived
us-gaap:StatementEquityComponents
mgm:OtherComprehensiveIncomeLossOtherTransactions

mgm:PartnersCapitalAccountRedemptionsPerUnit
dei:LegalEntity, us-gaap:Ownership
mgm:PartnersCapitalAccountUnitsRedeemedForCash
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:PercentageOfDividendOnEquityMethodInvestmentsFromUnconsolidatedAffiliates
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments
mgm:PercentageOfExpectedLeaseTermOfEconomicUsefulLife
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments
mgm:PercentageOfPresentValueOfFutureMinimumLeasePayments
us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:PercentageOfPrincipalAmountOutstandingGuaranteed

mgm:PreopeningAndStartUpIncomeExpense

mgm:ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts
dei:LegalEntity

mgm:ProceedsFromRelatedPartyTransactions

mgm:PropertyTransactionsNet

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

mgm:TripleNetOperatingLeaseAndGroundLeaseRentExpense

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:OtherOwnershipInterestsByName
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:DepreciationAndAmortization

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:IncomeStatementLocation
us-gaap:EquitySecuritiesFvNiUnrealizedGain

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate

us-gaap:ImpairmentOfInvestments

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:LeaseAndRentalExpense
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:TypeOfArrangement

us-gaap:LoansAssumed1

us-gaap:LossContingencyDamagesAwardedValue

us-gaap:MinorityInterestDecreaseFromRedemptions
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1

us-gaap:OperatingLeaseCost
us-gaap:Subsegments

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

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherOperatingActivitiesCashFlowStatement
us-gaap:ConsolidationItems
us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:PartnersCapitalAccountRedemptions
dei:LegalEntity, us-gaap:Ownership
us-gaap:StatementEquityComponents

us-gaap:PartnersCapitalAccountUnitsRedeemed
dei:LegalEntity, us-gaap:Ownership

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDividendsMinorityInterest
us-gaap:TypeOfArrangement
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RestructuringCharges

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:Ownership
us-gaap:SaleOfStockPercentageOfOwnershipAfterTransaction
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:StockIssuedDuringPeriodSharesIssuedForServices
dei:LegalEntity, us-gaap:CapitalUnitsByClass
us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

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

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:VariableInterestEntityOwnershipPercentage

mgm:AdvanceDepositsAndTicketSales
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:AssetsNoncurrentNetOtherThanPropertyPlantAndEquipment

mgm:AssetsNoncurrentOtherThanPropertyPlantAndEquipment

mgm:CasinoFrontMoneyCurrent
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxAssetsLeaseLiabilities
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxAssetsLongTermDebt
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxAssetsTaxDeferredExpenseReservesAccrualsAndOther
us-gaap:IncomeTaxAuthority
mgm:DeferredTaxLiabilitiesRightOfUseAssets
us-gaap:BalanceSheetLocation
mgm:DisposalGroupIncludingDiscontinuedOperationConsiderationNotesReceivableFairValue
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCapitalizedInterest
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCompletionGuarantee
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityContribution
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredGain
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityNetAssetsContributed

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityOtherAdjustments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:PropertyPlantAndEquipmentByType

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsCurrentLiability

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLiability

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLongTermLiability

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsCurrentLiability

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLiability

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLongTermLiability

mgm:FinanceLeaseLiabilityPaymentsDueAfterYearFour
us-gaap:TypeOfArrangement
mgm:FixedAnnualRentEscalatorPercentage

mgm:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

mgm:LoyaltyProgramObligationsCurrent

mgm:MinorityInterestOwnershipPercentageInConsolidatedSubsidiary
dei:LegalEntity
us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:OutstandingChipLiabilitiesCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
mgm:PercentInterestInALessThanHundredPercentOwnedConsolidatedAffiliate
us-gaap:TaxPeriod
mgm:TaxCreditCarryforwardExpirationAmount

mgm:UnpaidWagersAndOtherCurrent

us-gaap:AccountsReceivableGrossCurrent
us-gaap:ProductOrService

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:ValuationAllowancesAndReservesType
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisitionSharePrice
us-gaap:Range, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:CashAvailableForDistributions
us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility

us-gaap:ConstructionPayableCurrent

us-gaap:DebtInstrumentCarryingAmount
us-gaap:CreditFacility
us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible
us-gaap:ConsolidatedEntities

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:IncomeTaxAuthority
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsGross
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxCreditCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates
us-gaap:IncomeTaxAuthority
us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeAverageFixedInterestRate
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration
us-gaap:Energy, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:DueFromRelatedParties

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquityMethodInvestmentUnderlyingEquityInNetAssets

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent
dei:LegalEntity
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
dei:LegalEntity, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
dei:LegalEntity, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IncomeTaxesReceivable

us-gaap:InsuranceSettlementsReceivableCurrent

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:LineOfCreditFacility
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:LineOfCredit
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementScenario
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementScenario
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent
us-gaap:Ownership, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

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

us-gaap:OtherLongTermDebt

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
us-gaap:DebtInstrument
us-gaap:SeniorNotes
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents
us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardValuationAllowance

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

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Liabilities Current
Assets
Inventory Net
Current Assets
Inventory Net
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Liabilities Current
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Declared
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Prepaid Deferred Expense And Other Assets
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Dividends
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▁▁▂▂▂▂▂▃▄▅▄▅▅▇▇▇████▇▇▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁4.8654.9194.9434.9334.9334.9325.0315.1395.2635.3725.2755.3195.3795.5685.6635.6555.755.7455.7415.7285.6565.6515.6485.6325.6314.9134.9134.9094.9074.9064.9044.8984.8964.8944.8924.894.8894.8894.8884.8864.8864.8864.885NANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▂▂▂▂▂▃▄▅▄▅▅▇▇▇███486.53491.874494.318493.307493.281493.155503.148513.914526.333537.156527.48531.937537.867556.769566.276565.494575.009574.466574.124NANANA564.839NANANA491.292NANANA490.361NANANA489.234NANANA488.835NANANA488.513NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁495.302494.864NA493.517493.456496.984NA518.983535.417537.506NA540.396554.339571.97NA580.676582.056580.165NA573.812570.762569.455NA569.32570.114575.312NA490.914513.371513.144NA489.672489.484492.305NA488.945488.931488.861NA488.636554.89488.539NA441.328441.297NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█489.459494.864NA493.517493.456495.415NA518.983532.365534.219NA535.13548.433564.832NA573.527574.931574.403NA568.125565.459565.056NA563.287551.358491.422NA490.914490.786490.542NA489.672489.484489.291NA488.945488.931488.861NA488.636488.609488.539NA441.328441.297NA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█0.0018.484NA6.1835.373.876NA1.1082.4111.929NA2.4322.4410.17NA1.9892.0783.205NA3.3623.1246.456NA4.2374.4494.627NA16.5062.5342.625NA17.45418.49810.974NA22.99323.94230.589NA28.79118.00428.954NA26.00826.18NA
us-gaap:EarningsPerShareBasic ▃▂▂▂▂▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▃▃▂▃▃▃▂▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▂▁▃0.14-0.69-0.9199999999999999-1.08-1.671.643.94-0.080.080.05-0.060.260.210.392.430.260.370.360.040.940.840.12-1.380.120.180.35-0.7-0.040.220.22-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.257.04-0.18-0.29-0.72-2.0-0.22
us-gaap:EarningsPerShareDiluted ▃▂▂▂▂▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▄▃▂▃▃▃▂▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▂▁▃0.14-0.69-0.9199999999999999-1.08-1.671.643.91-0.080.080.05-0.060.260.210.382.40.260.360.360.040.930.830.12-1.380.120.170.33-0.7-0.040.210.21-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.256.22-0.18-0.29-0.72-2.0-0.22
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:ProductOrService mgm:EntertainmentRetailAndOther▄▃▂▂▁▆▇██▇▇█▇▇▇█▇189.011135.22298.859101.61848.569269.945362.492387.596382.738344.374349.718370.15363.242329.75315.214368.128353.23NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:Casino▆▅▅▃▁▅█████▇▆▇▆▆▆1336.1241098.633963.827690.218163.6491054.0261630.0521663.0491598.3121626.3461561.241465.381332.2141394.3161289.1451283.0491172.758NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:FoodAndBeverage▅▃▂▂▁▆▇██▇▇▇▇▇▆▇▇302.666157.412143.243126.31729.771396.709520.274560.2544.552520.221488.029520.773494.808455.411413.912503.623485.098NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:Occupancy▅▃▃▃▁▆████▇██▇▇█▇365.028198.419189.358175.4531.623433.951566.225595.636586.503574.215542.903566.319563.871539.48479.18572.994541.755NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _▃▂▂▂▁▅▇▃▃▃▃▃▃▃▃▃▃▃▃▄▄▃▁▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▃▃█▃▃263.76-246.69-363.568-495.182-1034.5291250.8452960.089238.381371.485370.26335.751410.903363.075359.757223.404493.861501.046497.181282.023712.755769.055315.954-1197.234297.377348.521395.104266.113286.489339.987412.633330.33247.763231.602301.817-424.856137.401175.375192.60691.107112.5743683.76169.705107.21NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▃▂▂▂▂▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▄▃▂▃▃▃▂▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▂▂108.418-332.083-442.353-535.071-861.238777.1212045.918-57.91341.50815.785-38.117152.349128.02219.5741399.954148.313194.246199.01126.921536.538473.5464.399-781.87966.98197.77170.439-337.66-27.117108.543107.893-37.451-31.548-89.6320.225-1222.057-179.672-141.243-216.394-104.437-125.5423438.204-87.309-137.871-316.84-884.239NA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▇▇▇▇▆▆█▇▇▇▇▇▇▇▇▇▇▇█▇▇▇▁▇▇▇███████▇▇▇█▇█▇▇-10.213-1.579-3.733-66.81-82.074-157.35280.14928.91134.74324.64421.75435.29919.13836.43134.126.49518.67540.43146.60226.45639.58822.034-692.26629.04529.30544.01159.29863.99471.02382.20579.97355.7665.479.82737.39827.83879.12214.775103.1915.4397.054NANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▃▃▂▂▂▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▄▃▁▃▃▃▃▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▃▂98.205-333.662-446.086-601.881-943.312619.7692126.067-29.00276.25140.429-16.363187.648147.158256.0051434.054174.808212.921239.44273.523562.994513.12886.433-1474.14596.026127.075214.45-278.36236.877179.566190.09842.52224.212-24.16210.052-1184.659-151.834-62.121-201.619-1.247-110.1033445.258-87.309-137.871-316.84-884.239NA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService mgm:EntertainmentRetailAndOther▂▂▁▂▁▆███▇██▇▆▇▇▇102.1778.38169.82787.59256.223199.063262.937274.85269.983243.63265.86263.915243.37226.834232.787254.113243.836NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService mgm:ReimbursedCosts▅▄▇▂▁▇██████▇▇▇▇▇75.13358.06198.24932.31716.19798.186106.093107.901111.138111.755110.972106.68104.56103.28100.154102.38199.292NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Casino▅▄▄▃▁▅█████▇▆▆▆▆▅616.903551.905504.41368.31200.393628.67917.543915.207888.392902.757876.261819.334741.531762.649704.142674.959627.361NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:FoodAndBeverage▄▂▃▂▁▆███▇▇▇▇▇▆▇▇214.159135.227140.239133.93760.306339.636407.323427.4426.664400.239380.403391.091376.985353.389324.482373.956363.011NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Occupancy▅▄▃▄▁▆████▇██▇▇▇▇137.287104.21397.935107.36141.251172.609205.748211.292208.643203.994193.329206.406202.968189.058180.499192.663187.116NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▆▆▆▆▅▅▄█▇▇▇▇▇▇▇▇▆▆▆▆▆▆█▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▁▅▅▆▇▅2087.541868.8581852.0121641.7371315.9851037.72242.6013112.2152878.7622845.42749.62653.8942543.562494.2462401.8462370.582181.2742250.7012210.8251834.9371948.7561908.4343429.3592040.7892079.5142054.5212117.3062221.5212246.9142236.5412198.9892219.2022256.3452066.6752718.2512079.6342154.3762081.6752200.9672121.552-1845.7481398.5921358.5991774.4212569.9521387.897
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.00.2020.079-126.743-142.0-2.721-53.2110.0-1.4260.443-1.617-1.019-14.351-30.547-0.7980.0-0.029-16.783-49.46-0.6610.00.0NANANANANANA-0.002-0.008-3.767-0.024-505.00.00.0-58.740.0NANANA-8.516NANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType us-gaap:SeniorNotesNANA0.00.0NA-105.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▃▂▂▁▅█▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▁▄▄▄▄▄▄▄▄▃▃▄▁▃▃▃125.13-430.636-562.872-678.705-1206.725936.8232622.326-1.17287.903137.66898.495190.456164.133180.92241.079291.611315.681315.384107.426516.265522.978112.508-1403.52178.242122.695156.34140.63760.59121.164188.08945.99415.475-26.71353.009-1279.038-157.259-121.738-176.178NANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▆▆▆▆▅▇█▆▆▆▆▆▆▆▁▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▅▄▆34.826-94.698-106.904-76.734-270.238262.304556.376-7.27611.73471.51192.019.04623.71-85.379-1384.214115.11574.06162.37537.504-44.9958.4821.3169.976-16.493-3.772-56.305328.10910.208-52.54-3.5195.117-8.153.86530.431-90.541-2.585-51.30427.129-190.876-79.68-78.174-54.583-45.845-192.936-479.495-60.352
us-gaap:IncomeTaxesPaidNet ▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆█▆▆▆▇▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆▆▄▆▆▆▁▆4.299-2.401-0.0526.728-0.5722.43910.27111.15313.498-6.429-1.882.447-13.6022.93523.11417.932138.0452.564.9147.91450.8074.601-19.6399.47717.2164.7472.0131.7544.6443.8640.029-0.576-2.3543.7360.4430.2934.4161.83-0.9861.145-174.091.9131.030.315-362.2730.74
us-gaap:InterestExpense ▃▃▃▂▁▁▃▄▄▄▄▄▂▂▁▁▂▂▁▂▂▂▃▃▃▄▃▃▃▄▄▄▄▅▇▇▇█▇▇▇▇▇██▇202.772195.295188.679173.808156.756157.137200.48215.503215.829216.12214.538205.573181.493167.909157.341163.287174.058174.059161.704168.048180.352184.669186.291191.781203.245216.262200.903202.835203.936209.387208.461208.939214.5225.447279.922275.771276.323284.342274.152272.542270.224269.914273.097285.139291.169264.175
us-gaap:InterestPaidNet ▄▂▅▂▂▃▅▄▄▅▄▄▃▃▂▄▂▅▁▄▃▄▃▅▄▅▄▄▄▄▄▅▅▅█▆▆▅▇▅▇▅▆▆▆▆200.92146.631211.198139.101127.417162.002229.185182.589205.849209.347206.741192.089156.375168.404135.786180.861129.843212.147109.821203.241153.076195.028152.287225.462185.361213.43180.997203.805191.75200.226194.643209.49217.534218.613305.559260.77261.491211.835288.022208.144285.721220.095260.483259.034248.674251.849
us-gaap:LitigationSettlementExpense NANA0.00.049.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▅▄▄▄▄▅▇▄▄▄▄▅▅▅▆▅▅▅▄▅▅▄▄▄▅▅▄▄▅▅▄▄▄▄▃▄▄▄▁▄█▄▄▄▃▄104.753-331.829-447.605-534.731-857.257806.8692011.577-37.13343.40531.297-23.327142.878123.777223.4441393.713149.115210.611206.84724.669535.619474.35366.799-781.45466.42597.459169.85-342.263-20.27105.544108.16-56.805-31.859-92.9586.546-1223.827-181.159-145.452-217.253-3258.636-123.7863441.985-89.871-139.189-317.991-883.476-96.741
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▇▇▇▇▆▆██▇▇▇▇▇█▇▇▇██▇█▇▁▇▇████████▇▇▇█▇█▇▇-14.449-4.109-8.363-67.24-79.23-132.3554.37343.23732.76434.8629.08728.53216.64642.85731.5827.38131.00946.16245.25325.64140.14524.399-692.04328.3129.00842.79654.79170.65268.1683.44879.21255.48462.3816.03235.3326.48575.01813.94694.3917.2118.706NANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic 67.742NA-454.113-532.954-825.075814.9392014.77-40.20744.39727.472-29.914138.723117.791218.8461375.433149.087210.583206.81924.641535.619474.35366.799-781.45466.42597.459169.85NANANANA-38.335-31.859-92.9586.546-1223.827-181.159-145.452-217.253-113.691-123.7863441.985-89.871NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted 67.742NA-454.092-532.979-825.095814.9392014.687-40.23744.36227.42-29.941138.68117.765218.6811375.34149.045210.521206.76324.608535.604474.34766.799NANANANANANANANANA-31.89NANANA-181.159NANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ██▇██▆▆▇▇▇▇▇▇██▇███▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▁▆▆▆▆▆▆▆▆▆▆█-138.63-183.946-199.304-183.523-172.196-314.022-337.763-239.553-283.582-232.592-237.256-220.447-198.942-178.835-182.325-202.25-185.365-181.797-174.597-196.49-246.077-203.446-206.287-219.135-225.826-238.763-225.476-225.899-218.823-224.544-284.336-232.288-258.315-248.808-854.182-294.66-297.113-368.784-301.284-298.829-311.243-314.159-292.244-305.026-314.154-145.67
us-gaap:OperatingIncomeLoss ▃▂▂▂▁▅▇▃▃▃▃▃▃▃▃▃▃▃▃▄▄▃▁▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▃▃█▃▃▂▁▃263.76-246.69-363.568-495.182-1034.5291250.8452960.089238.381371.485370.26335.751410.903363.075359.757223.404493.861501.046497.181282.023712.755769.055315.954-1197.234297.377348.521395.104266.113286.489339.987412.633330.33247.763231.602301.817-424.856137.401175.375192.60691.107112.5743683.76169.705107.21-205.901-1048.817-11.423
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▅▂▄▄▄▇█▂▇▃▄▅▄▁▄▄▁▂▄▄▄▃▄▄▄▄▅▂▅▄▄▄▅▃▅▄▅▄▆▄5.811-13.022-1.4010.5380.28928.33633.497-18.60226.38-12.405-2.4812.211.4-24.152-1.875-3.004-25.376-12.9331.7221.734-1.37-4.765-0.6481.2910.6082.4769.11-13.5055.862-2.761.6450.5876.416-12.6414.2832.848.3131.68818.054-3.528NANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▅▄▅▄▄▁█▂▄▃▃▅▅▄▅▄▃▄▅▄▄▄▄▄▄▄▅▄▅▄▄▄▅▄▅▅▅▄▅▄7.9012.2769.8820.09-6.825-54.7560.117-35.1060.082-25.728-22.12316.2386.735-10.2968.761-1.688-28.699-13.5673.6011.734-1.37-4.765-0.6481.2910.6081.8049.11-13.5055.862-1.511.6450.5876.416-12.5263.8382.848.3131.68818.054-3.528NANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▇▇▇▇▇▅▅▆▆▇▇▇▇▇▆▆▇▇▇▆▆▇▇▇▇▇▇▇▇▇▇▇▇▇▁▇▇▆▇▇▆▇▇▇▇█87.35832.18512.69313.8898.321-124.264-129.298-9.381-46.2761.693-6.552-3.291-6.381-1.916-16.535-30.138-0.751-0.817-4.983-17.31-49.84-0.565-3.279-4.386-4.815-3.49-5.8-0.254-0.309-1.434-2.153-0.676-4.951-1.282-552.8432.0120.046-57.576-1.103-1.595-13.017-3.9557.4757.2988.589141.855
us-gaap:ProfitLoss ▃▃▂▂▂▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▄▃▁▃▃▃▃▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▃▂▃90.304-335.938-455.968-601.971-936.487674.5192065.956.10476.16966.1575.76171.41140.423266.3011425.293176.496241.62253.00969.922561.26514.49891.198-1473.49794.735126.467212.646-287.47250.382173.704191.60840.87723.625-30.57822.578-1188.497-154.674-70.434-203.307-19.301-106.5753450.691-89.871-139.189-317.991-883.476-96.741
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▆▄▄▃▁▆████▇▇▇▇▆▇▆▇▆▆▆▅▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▅▄▄▄▄▄2267.9621647.7471493.5361125.92289.8092252.8173185.1363314.3823223.2433176.9113052.8623029.3022858.6952822.2372597.6052830.1752652.1332717.5662460.822515.1152269.5022209.6862191.8732280.8162385.1352332.2442385.5462485.0072581.0332630.3982513.2132463.0372481.2652352.1482294.5112254.9782323.7652287.592296.8892233.5871805.9851504.9541475.3021567.1171547.3291457.392
us-gaap:Revenues ▆▄▄▃▁▆████▇▇▇▇▆▇▆▇▆▆▆▅▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▅▄▄▄▄▄2267.9621647.7471493.5361125.92289.8092252.8173185.1363314.3823223.2433176.9113052.8623029.3022858.6952822.2372597.6052830.1752652.1332717.5662460.822515.1152269.5022209.6862191.8732280.8162385.1352332.2442385.5462485.0072581.0332630.3982513.2132463.0372481.2652352.1482294.5112254.9782323.7652287.592296.8892233.5871805.9851504.9541475.3021567.1171547.3291457.392
us-gaap:SellingGeneralAndAdministrativeExpense █▇▇▇▅█▇▆▆▆▄▅▄▄▄▃▂▃▃▃▁▁590.209546.407531.17543.293473.564574.306557.453494.228524.424525.112444.878463.417438.453417.89414.483402.134354.463388.835376.717371.95321.407308.543NANANANANANANANANANANANANA319.106309.478303.289307.312304.049301.582269.562277.889292.456282.404276.054
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▇▇▇▇▇█▆▅▅▅▅▅▅▅▅▅▄▄▄▄▄▃▃▄▄▄▄▃▃▃▄▃▃▄▄▄▄▄▄▄▄▁▁36776.37837330.76736494.93437004.77537471.28539118.90533876.35631168.87130813.71531146.92130210.70629973.51528977.1629298.2729159.17829101.8928542.93128303.09228173.30127705.28626549.05525497.2925215.17826680.26627149.58726798.44726702.51125448.48625572.30325350.70926110.18525658.83525722.13726057.87426284.73827831.36127263.00827391.02827766.27627853.02327216.1918760.34918961.045NANANA
 us-gaap:Liabilities dei:LegalEntity mgm:MGMGrowthPropertiesLimitedLiabilityCompany███▁5000.05000.05000.04400.0NANA5000.05500.05500.05600.05100.05100.04300.04300.04300.04300.03900.03900.03900.03900.03200.0NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇▇▇▇▇█▆▅▅▅▅▅▅▅▅▅▄▄▄▄▄▃▃▄▄▄▄▃▃▃▄▃▃▄▄▄▄▄▄▄▄▁▁36776.37837330.76736494.93437004.77537471.28539118.90533876.35631168.87130813.71531146.92130210.70629973.51528977.1629298.2729159.17829101.8928542.93128303.09228173.30127705.28626549.05525497.2925215.17826680.26627149.58726798.44726702.51125448.48625572.30325350.70926110.18525658.83525722.13726057.87426284.73827831.36127263.00827391.02827766.27627853.02327216.1918760.34918961.045NANANA
us-gaap:StockholdersEquity ▅▆▆▆▇█▇▅▆▆▆▆▆▇▇▆▆▆▅▅▄▄▄▅▅▃▃▃▃▃▃▃▃▃▃▅▅▅▅▅▆▁▁6180.1816306.8286504.7266861.1047374.7898173.9147727.2656060.5526520.4846786.2046512.2836773.3586847.1427370.797612.6526308.5436511.4086376.4956220.186190.8315532.585199.8995119.9275901.2445828.214273.1184090.9174420.8564457.3034343.2894231.1794262.3574289.0614372.8574365.5485553.275725.7855878.4076086.5786248.8566365.8512919.1622998.545NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▇▇▆▆▇█▄▃▂▂▂▂▂▂▂▃▂▂▂▂▃▂▂▂▃▃▃▂▂▂▃▂▂▂▂▃▂▂▃▃▁▁▁6574.5437083.8675950.6596186.2816370.7687597.9294007.6932880.7462040.0342207.1352526.7782208.0242083.1162392.7132374.6272794.5362485.1312172.7182229.5872214.3483193.7872401.6442408.7492582.2743267.0222956.6073027.161991.0572166.3151970.632719.4392284.0152210.242439.2452507.0923347.8172677.4172593.6772812.722721.8071793.281366.4111455.645NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▇█▇▆▆█▃▂▂▂▂▂▂▂▂▃▃▂▂▂▄▃▃▃▃▃▃▂▂▂▃▂▂▂▂▃▃▂▃▃▂▁▁▁▂▁5626.2326171.5125101.6374593.8724835.5056016.4172329.6041233.5691160.5911223.4041526.7621302.6771272.8721525.4021499.9951986.6881757.0621395.4441446.5811446.1582503.2551664.9051670.3121807.7952342.342195.5351713.7151313.4271365.1371114.7361803.6691375.4031278.6731480.6371543.5092443.1591731.9211634.8921865.9131815.125921.553431.275498.964552.7571013.208440.587
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▇█▇▆▆█▃▁▁▁▂▁▁▂▁▂5626.2326171.5125101.6374593.8724835.5056016.4172329.6041233.5691160.5911223.4041526.7621302.6771272.8721525.4021499.9951986.688NANA1446.581NANANA1670.312NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▄▂▂▂▁▄▇▆▆▇█▆▅▅▆▅▄▅▆▅▄▄▅430.841360.188316.502328.413287.065454.826612.717550.345562.772602.602657.206546.646497.35505.591540.545515.423469.126493.765542.924492.426443.903452.751480.559NANANA473.345NANANA488.217NANANANANANANANANANANANANANANA
us-gaap:InventoryNet ▁▂▃▅▇▇▆▆▇█▇▆▇▇▆▆▆▅▅▅▅▅▆▅▇▆▆▅▆▆▇▅▆▆▇▇█▇█▆▆▄▅79.01982.34688.32397.316106.791106.327102.888104.206106.707111.302110.831104.438109.13107.309102.292101.242103.119100.50297.73397.497.897.584104.2100.533106.914103.286104.01199.274102.524101.553107.90798.33101.11105.047107.577107.772113.316110.674112.735104.279105.31895.09796.392NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▅▆▄▇▅▆▄▆▄▇▄▆▃▅▄▄▂▃▁▃▁▃▁▄▁▄▂▁▆▇▆█▇▇▆▇▆█▇▇▇212.258227.644200.782245.303223.9240.9200.317233.749188.97251.291203.548234.711180.64212.758189.244191.183148.462183.007142.349177.886137.635177.256137.685187.05136.656188.31151.414144.503224.732261.806238.657272.809248.615258.784232.898243.665231.458270.692251.282259.538245.29NA252.321NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NoncurrentAssets NANA28653.811NANANA28589.504NANANA26495.743NANANA25319.95NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:USNANA21035.992NANANA20582.055NANANA18228.939NANANA16863.222NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical us-gaap:NonUsNANA7617.819NANANA8007.449NANANA8266.804NANANA8456.728NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross NANA21905.987NANANA26774.353NANANA29747.738NANANA27885.649NANANA25993.222NANANA22311.733NANANA20966.781NANANA20220.265NANANA19907.902NANANA20203.743NANANA19385.78NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType mgm:FurnitureFixturesAndEquipmentNANA5600.579NANANA5924.439NANANA6064.33NANANA5157.363NANANA4863.647NANANA4274.537NANANA4178.723NANANA4040.887NANANA3995.161NANANA3926.438NANANA3768.476NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNANA170.957NANANA209.89NANANA321.944NANANA3950.635NANANA2628.603NANANA2111.86NANANA999.616NANANA437.434NANANA140.693NANANA122.372NANANA72.843NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA4081.029NANANA5348.223NANANA6923.769NANANA6531.701NANANA6530.988NANANA6495.391NANANA6475.134NANANA6477.489NANANA6499.492NANANA7032.853NANANA7039.806NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandBuildingsAndImprovementsNANA12053.422NANANA15291.801NANANA16437.695NANANA12245.95NANANA11969.984NANANA9429.945NANANA9313.308NANANA9264.455NANANA9272.556NANANA9122.08NANANA8504.655NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA7474.876NANANA8581.835NANANA9017.85NANANA8250.19NANANA7568.199NANANA6939.938NANANA6525.239NANANA6165.053NANANA5713.25NANANA5337.099NANANA4831.43NANANA
us-gaap:PropertyPlantAndEquipmentNet ▁▁▂▂▂▂▅▇████▇▇▆▆▆▆▅▅▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▁▂14344.68414454.03214632.09114792.37814977.40815172.95918285.95520603.97821054.33721196.43820729.88820733.38119863.07819711.82919635.45919134.74818896.91218619.66618425.02317948.04516102.85615692.73115371.79515014.64214791.55814561.95114441.54214253.70314113.72214034.07514055.21213969.29314042.30914117.77814194.65214765.34914783.17714786.8214866.64414868.39415017.90514426.62214554.35NANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▅▅▅▅▅▆▂▂▁▁▁▁▂▃▃▃▃▄▄▄▅▅▆▆▆▆▆▆▅▅▅▅▅▅▅▆▆▆▆▆▇██1484.7171439.4541447.0431473.9551468.4951596.17822.366758.992746.733730.996732.867666.21882.941050.7951034.1611007.584980.8851252.4321220.4431196.5431364.1631478.5011491.4971536.5311491.0521661.4441559.0341555.3531420.9241416.6641374.8361416.4621408.1391435.1361444.5471488.6621498.8641589.9151635.5721659.7191690.1361941.7861923.155NANANA
us-gaap:Goodwill ▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▄▄▄██████████████████▁▁2089.2122087.4582091.2782091.7692091.6972091.5952084.5642076.4312080.9042001.6461821.3921822.0091801.0341800.5861806.5311807.0091807.7721814.0281817.1191815.2091429.2791429.5471430.7672898.9962898.3832898.1272897.112893.4672898.8612896.5422897.4422900.7582900.5432898.0872902.8472901.2732900.2372897.0492896.6092905.3782906.75586.35386.353NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill NANA677.336NANANA678.31NANANA638.12NANANA410.12NANANA410.12NANANA327.12NANANA330.221NANANA330.221NANANA332.171NANANA332.171NANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass mgm:TrademarksAndOtherNANA299.238NANANA300.212NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇▇▇▇█████▁▁3545.8153586.6033643.7483697.5493746.7343795.853826.5043866.5363922.6844046.7563944.4633991.9633776.773819.3693877.963924.5663972.0464033.7564087.7064137.4754072.3174116.9044164.7814212.664256.4094309.2064364.8564331.7684396.4364451.4964511.8614548.4154609.0884666.6594737.8334813.1834889.3114965.5875048.1175120.6625209.866342.626342.804NANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA2966.412NANANA3148.194NANANA3306.343NANANA3467.84NANANA3677.586NANANA3837.661NANANA4034.635NANANA4181.64NANANA4405.662NANANA4715.9464787.9914876.096NA9.034NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet dei:LegalEntity mgm:MGMNationalHarborAndMGMSpringfieldGamingLicensesNANA87.498NANANA94.604NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet dei:LegalEntity,us-gaap:FiniteLivedIntangibleAssetsByMajorClass mgm:MGMGrandParadise,mgm:GamingSubconcessionNANA2844.509NANANA3004.786NANANA3126.205NANANA3298.003NANANA3489.888NANANA3657.336NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssetsNANA34.405NANANA102.953NANANA105.074NANANA109.231NANANA111.379NANANA112.088NANANA112.797NANANA28.506NANANA7.614NANANA8.3238.588.678NA9.034NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA379.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ██████▅▂▂▂▁8208.9728240.8978286.6948330.538379.6078425.6534392.481650.99664.817641.9120.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▆▄▄▄▄▄▅▂▁▁▅▇▇▆▄▄▃▄▃▃▃▃▂▄▄▄▄▄▇█▇▇▇▆▆▆▆▇▆▇███528.435438.456443.421432.313436.576438.749456.793331.198304.206322.038455.318551.928570.222522.978430.44433.447400.185410.492393.423393.666386.653377.963347.589435.163445.163411.112412.809423.138576.045581.302551.395539.892551.818500.969497.767515.077514.002557.98506.614577.063598.248596.551598.738NANANA
us-gaap:EquitySecuritiesFvNi 124.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▄▂▂▂▁▄▅▅▆█▇▇▆▅▅▅▄▄▅▅▂▃▃▃▃▃▂▆▅▄▅▄▅▃▄▄▃▂▃▂▃▂▂210.654160.894142.523150.445122.428202.735235.437253.637277.591336.586302.578301.008268.14253.391255.028242.604206.144204.835250.477232.49161.42183.777182.031168.651174.246187.325164.252266.696253.475220.523241.192202.792229.599178.435199.62201.15171.878163.626170.994158.477179.703138.533167.084NANANA
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService mgm:CustomerAdvancesAndOther▅▃▂▂▁▂▄▄▆▇█▆▅▅▆▃▃▃▄513.971407.372382.287359.877306.752371.479481.095444.573588.559613.764667.285563.244510.75492.599539.626429.71425.197400.051437.287NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService mgm:LoyaltyProgram█▇██▇▆▆▆▅▅▄▃▂▂▁▂▁▁▁136.659133.047139.756138.785131.641128.65126.966125.518120.978119.033113.293105.42198.30893.45991.11991.96788.19588.81488.379NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService mgm:OutstandingChipLiability▁▁▂▃▃▃▃▃▃▃▃▅██▆▃▃▃▂144.975170.04212.671350.848338.39301.333314.57328.061322.259307.912323.811550.041759.049779.242597.753317.572319.878290.614227.538NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DividendsPayableCurrent NANA64.086NANANA53.489NANANA31.732NANANA29.777NANANA22.281NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▄▃▃▆▅▅▇▇▆▆▆▆▆█▇▆▅▄▄▄▃▄▄▃▆▃▇▇▅▄▄▄▄▃▃▃▃▃▃▃▂▁▁2036.3711835.3861856.5832766.7842575.1282626.2473191.4233293.2442786.5392812.6782948.8822977.593064.7933586.8883092.3822735.762679.5682124.7642293.4212130.6351917.7792088.3112237.9511952.8552790.7951895.7613407.9253369.3142560.3162159.5642215.3282161.472098.1461870.9881925.6712025.8541929.3841892.3871744.7642015.3471585.0251172.441246.221NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▁▁▂▂▂█31.40229.83731.84335.65136.61933.39867.473NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA165.344NANANA227.366NANANA260.881NANANA178.34NANANA215.6681475.1991262.1181233.0451311.4441362.7631262.4991327.9591574.6171709.0791764.1671683.5691770.8011772.221667.2051483.0051517.9651574.671364.1231413.5071362.7371261.8431202.332NA867.223NANANA
us-gaap:OtherLiabilitiesCurrent ▃▁▂▂▁▂▆▆▇▇▇▇██▆▃▂▁▂1642.4091474.8411545.0791636.7831497.5631538.8572024.0022000.3432140.4182086.9462151.0542161.0642237.5242233.4262068.721661.0321599.0721515.6241594.526NANANA1311.444NANANANANANANANANANANANANANANANANANA795.732867.223NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ▃▅▃▁▁▂▁█▇▇█▇▅▅▄▅▅▄▄▄▃▄▄▄▅▇▆▄▄▄▅▄▄▅▅▆▅▅▅▅12574.93913245.44812376.68411414.7311339.56111743.34811168.90414943.87414661.69514733.37715131.41614663.97213513.34113282.46912909.09413493.30213197.85813099.1912987.59512786.4212364.9212929.28112696.75312821.03713370.23814551.8114159.20212915.19712923.71412930.72813447.2313034.51813111.96113690.69913589.28313825.45113366.99313359.95313470.16713450.682NANA12047.698NANANA
us-gaap:LongTermDebtNoncurrent ▄▅▃▁▁▂▁█▇▇█▇▅▄▄▄▄▄▄▄▃▄▃▄▃▇▄▂▄▄▅▄▄▆▅▆▅▅▅▄▄▃▃12574.93913245.44812376.68411414.7311339.56111743.34811168.90414943.87414661.69514730.82915088.00514663.97213513.34112742.86112751.05213026.92712725.26813099.1912979.2212786.4212364.9212686.38112368.31112821.03712495.20914551.8112913.88211723.65512606.5212930.72813447.2313034.51813111.96113690.69913589.28313825.45113225.31913359.95313470.16713099.07412630.29112081.10812047.698NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▂▁▁▂█2170.9452154.8322153.0162164.2312242.707NA2106.506NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▇▇▇▇▇█▇▆▆▆▅▅▅▅▅▅▄▄▄▄▅▁▁▃▃▃▃▃▃▃▄▄▄▃▄▄▄▄▄▄▄4923.9414925.6914675.1824841.5584973.9935158.0874935.6544460.0664434.2374431.6613957.5083972.8213992.7994029.5814034.0634016.1973719.5893764.2223749.1323726.6283994.3032665.1112644.53338.4783348.623379.9173537.3573477.783484.2253479.5573644.4443564.8143568.1053506.1963750.4683712.2333686.4223612.8283795.6443692.753679.423NANANANANA
 us-gaap:OtherLiabilitiesNoncurrent dei:LegalEntity,us-gaap:BalanceSheetLocation mgm:GrandParadiseMacau,mgm:OtherLongTermObligationsNANA34.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ██████▅▁▁▁▁8403.8628392.2168390.1178380.3418376.778374.9874277.97518.365529.171510.9510.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo █▆▁▁628.027625.359616.235615.855NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree █▇▁▁638.031635.75625.365625.365NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour █▇▁▁647.148644.801635.755635.755NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA644.804NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA19801.073NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▅▆▆▆▇█▇▅▆▆▆▆▆▇▇▆▆▆▅▅▄▄▄▅▅▃▃▃▃▃▃▃▃▃▃▅▅▅▅▅▆▁▁6180.1816306.8286504.7266861.1047374.7898173.9147727.2656060.5526520.4846786.2046512.2836773.3586847.1427370.797612.6526308.5436511.4086376.4956220.186190.8315532.585199.8995119.9275901.2445828.214273.1184090.9174420.8564457.3034343.2894231.1794262.3574289.0614372.8574365.5485553.275725.7855878.4076086.5786248.8566365.8512919.1622998.545NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▅▅▅▆▇█▇▅▅▅▄▅▅▆▆▄▄▄▄▄▃▁▁▃▃▁▁▁▁▁▁▁▁▁▂▃▃▃▄▄▄11104.12211232.51911179.90811702.66212348.78213332.00112662.91910520.61810954.72111217.86510469.79110746.17910839.94111400.37111646.71510324.7410230.99710140.7179969.3129917.4599526.8837865.017764.4279239.7229176.837653.0357628.2747898.6367941.5287822.8467875.6237827.1717857.1667879.0538116.0169265.5039412.2079491.2359882.2229941.60610045.274NA2998.545NANANA
us-gaap:CommonStockValue ▁▁▂▂▂▂▂▃▄▅▄▅▅▇▇▇████▇▇▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁4.8654.9194.9434.9334.9334.9325.0315.1395.2635.3725.2755.3195.3795.5685.6635.6555.755.7455.7415.7285.6565.6515.6485.6325.6314.9134.9134.9094.9074.9064.9044.8984.8964.8944.8924.894.8894.8894.8884.8864.8864.8864.885NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ▁▂▁▁▁▁▂▃▄▄▃▄▄▆▇▇█████████▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃3335.0153569.1863439.4533355.6933333.0743274.4543531.0993846.3694181.5854420.4634092.0854251.7024413.8144999.9585357.7095390.0715677.9665674.0575653.5755651.165530.5925671.4565655.8865655.345649.2884192.6844180.9224173.2054166.3654160.8954156.684150.4134145.5714139.7374132.6554098.3224091.1664102.5454094.3234085.7834077.2364068.7514060.826NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▆▅▆▆▇█▇▅▅▅▅▅▅▅▅▃▃▃▃▃▂▂▂▃▃▂▂▃▃▃▂▂▂▃▃▄▄▄▅▅▅▁▁2861.4742757.9413091.0073539.8484075.8124934.3024201.3372255.8852359.9662384.9772423.4792510.1032431.1862372.7442252.89922.657836.84689.476545.811521.142-14.477-488.83-555.629225.825159.461.941-107.909234.354270.796165.25257.09295.427127.286220.244213.6981437.5251618.6841764.1361981.3892161.4632285.249-1156.736-1066.865NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▃▃▂▂▂▅▁▃▄▅▇▆▅▆▅▅▇█████████▇█████▇███▇▇▆▆▇▆-21.173-25.218-30.677-39.37-39.03-39.774-10.202-46.841-26.33-24.608-8.5566.234-3.237-7.48-3.61-9.84-9.1487.21715.05312.80110.80911.62214.02214.44713.89113.5812.9918.38815.23512.23612.50311.61911.3087.98214.30312.53311.0466.8375.978-3.276-1.522.261-0.301NANANA
us-gaap:MinorityInterest ▇▇▇▇▇█▇▆▆▆▅▅▅▅▅▅▄▄▄▄▅▁▁▃▃▃▃▃▃▃▄▄▄▃▄▄▄▄▄▄▄4923.9414925.6914675.1824841.5584973.9935158.0874935.6544460.0664434.2374431.6613957.5083972.8213992.7994029.5814034.0634016.1973719.5893764.2223749.1323726.6283994.3032665.1112644.53338.4783348.623379.9173537.3573477.783484.2253479.5573644.4443564.8143568.1053506.1963750.4683712.2333686.4223612.8283795.6443692.753679.423NANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA▂█▁▁▁▆▇▂▂▇111.51647.7540.00.00.0507.551527.77982.73762.199528.843NANANANANA361.622NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA,mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest▂█▁▁▁▃0.3712.8680.00.00.00.646NA0.20.105-0.774NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA,us-gaap:AccumulatedOtherComprehensiveIncome▃█▂▂▂▄▆▃▃▁0.3712.8680.00.00.00.6461.9810.20.105-0.774NANANANANA0.109NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA,us-gaap:AdditionalPaidInCapital▂█▁▁▁▆▇▂▂▆16.75283.1420.00.00.064.18870.96412.3999.90557.196NANANANANA35.029NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA,us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest▂█▁▁▁▃0.3712.8680.00.00.00.646NA0.20.105-0.774NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA,us-gaap:NoncontrollingInterest▂█▁▁▁▇▇▂▂▇94.387561.7440.00.00.0442.717454.83470.13852.189472.421NANANANANA326.484NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues dei:LegalEntity,us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mgm:MGMGrowthPropertiesLimitedLiabilityCompany,us-gaap:CommonClassA,us-gaap:Parent▂█▁▁▁▆▇▂▂▆17.12386.010.00.00.064.83472.94512.59910.0156.422NANANANANA35.138NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▁▃▆▄▃█▅▂▃▇10.85816.54929.27521.94818.83536.89824.31815.3217.06432.136NA17.10617.80716.11716.19615.34715.01315.96616.64213.98712.89212.08612.2879.72110.29210.70211.00810.2268.6718.4638.6687.628.1948.9410.22810.349NANA12.31911.145NANANANANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▁▁█▁▃▂▆▄▂▁3.293.11266.6091.04419.6017.96251.06426.52913.7165.133NA17.61824.2879.79130.73227.02942.8222.04424.67745.99230.5212.2672.66640.16661.859202.8030.98771.35967.304247.5610.059.3274.357254.660.02.7326.439198.00.996NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▄▃▄▁▂▇▆▇▆▆▆▇▇█▇456.026-87.61-243.438-164.103-662.565-422.937454.293388.275568.051399.782327.073302.315515.487577.664694.502572.783NANANANANANANANANANANANANANANANANANANANANANANA184.117272.94523.978123.61630.554394.753-44.909
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▂▂▂▂▅█▂▂▁▂▁▂▂▂▂-118.81-154.912-112.25-69.561-21.5662362.6814548.687-151.688-150.754-726.811-284.329-1119.259-247.056-432.377-453.978-533.836NANANANANANANANANANANANANANANANANANANANANANANA-95.269331.683-110.537-165.157-54.736-49.952-316.234
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▇▇▆▅█▁▆▅▆▆▇▅▆▅▆-883.5131313.499863.589-7.985-496.931744.753-3909.708-162.107-482.6324.851181.837845.548-521.101-117.05-726.798190.965NANANANANANANANANANANANANANANANANANANANANANANA804.81-114.10318.87-12.252-436.269227.82-1254.477
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂▄▃▂▁█▄▃▃▂▃▃▂▃▂-545.281069.875507.765-241.633-1180.9123686.8131096.03572.978-62.813-303.358224.08529.805-252.5325.407-486.693NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▆▆▆▆▅▇█▆▆▆▆▆▆▆▁▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▅▄▆11.472-80.293-31.286-79.668-147.92277.221542.261-15.8280.78667.827105.48212.22418.76-89.746-1360.34682.5722.122-9.029.03-52.114-45.1977.653102.608-25.535-12.04-68.648325.4549.4314.585-7.6371.615-11.8416.01863.125-66.285-7.235-1.821-41.862-171.806-76.5-80.713-65.418-46.91-237.995-440.28391.106
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▅▁▅▄▄▅█▄▄▅▅▅▄▅▅▄▄▅▅▅▄▅▅▅▅▅▄▅▅▅▄▄▅▅▄▅▅▅▅▅▅▅▅▅▄92.18345.97-767.70655.716-111.884-136.22570.824735.866-31.119-48.961117.76357.9481.231-27.38831.97249.697-27.008-36.22357.94812.647-14.64-22.74717.46915.13423.7676.3554.113-31.642-4.22214.18675.172-29.033-32.22745.9331.267-50.92213.1525.24347.91100.1252.5224.4864.798-2.73836.503-21.187
us-gaap:IncreaseDecreaseInInventories ▃▂▁▁▅▆▅▄▃▄▇▂▅▆▅▄▅▆▅▃▅▂▆▃▆▄▆▃▅▂█▃▃▄▄▂▅▄█▄▅▄▆▃▅▂-3.356-5.911-9.013-9.4760.4623.3221.212-2.621-4.69-0.4236.403-5.4711.8145.1141.058-1.8712.6732.7960.329-4.7510.218-6.6023.704-3.9523.628-0.7315.341-3.1170.958-6.3499.574-2.782-3.947-2.509-0.202-5.5492.629-2.0618.433-1.0351.935-1.2942.912-3.3260.438-5.442
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▄▃▄▁▂▇▆▇▆▆▆▇▇█▇456.026-87.61-243.438-164.103-662.565-422.937454.293388.275568.051399.782327.073302.315515.487577.664694.502572.783NANANANANANANANANANANANANANANANANANANANANANANA184.117272.94523.978123.61630.554394.753-44.909
us-gaap:NetIncomeLoss ▅▄▄▄▄▅▇▄▄▄▄▅▅▅▆▅▅▅▄▅▅▄▄▄▅▅▄▄▅▅▄▄▄▄▃▄▄▄▁▄█▄▄▄▃▄104.753-331.829-447.605-534.731-857.257806.8692011.577-37.13343.40531.297-23.327142.878123.777223.4441393.713149.115210.611206.84724.669535.619474.35366.799-781.45466.42597.459169.85-342.263-20.27105.544108.16-56.805-31.859-92.9586.546-1223.827-181.159-145.452-217.253-3258.636-123.7863441.985-89.871-139.189-317.991-883.476-96.741
us-gaap:ProfitLoss ▃▃▂▂▂▄▆▃▃▃▃▃▃▃▅▃▃▃▃▄▄▃▁▃▃▃▃▃▃▃▃▃▃▃▁▃▃▃▃▃█▃▃▃▂▃90.304-335.938-455.968-601.971-936.487674.5192065.956.10476.16966.1575.76171.41140.423266.3011425.293176.496241.62253.00969.922561.26514.49891.198-1473.49794.735126.467212.646-287.47250.382173.704191.60840.87723.625-30.57822.578-1188.497-154.674-70.434-203.307-19.301-106.5753450.691-89.871-139.189-317.991-883.476-96.741
us-gaap:ShareBasedCompensation ▁▃▆▄▃█▅▂▃▇▃▃▃▂▂▂▂▂▃▂▂▁▁10.85816.54929.27521.94818.83536.89824.3215.3217.06232.13619.16717.09917.80116.1116.18815.34115.00515.9616.6113.95412.87512.04812.248NANANANANANANA8.3987.3797.9328.6239.4289.33610.19210.60411.04610.0559.3969.218.8328.5998.0029.555
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▂▂▂▂▅█▂▂▁▂▁▂▂▂▂-118.81-154.912-112.25-69.561-21.5662362.6814548.687-151.688-150.754-726.811-284.329-1119.259-247.056-432.377-453.978-533.836NANANANANANANANANANANANANANANANANANANANANANANA-95.269331.683-110.537-165.157-54.736-49.952-316.234
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▂▁▁▂▃▂▂▃▄▅▆▅▆▆▅▆█▇▇▅▆▅▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▂▁▁▁104.47878.91493.00837.36367.09873.11256.22161.168138.366183.252262.919362.163443.137418.624464.804526.668416.535456.075672.165619.737543.072427.499466.241406.537301.712292.329254.582247.211177.497192.751182.551136.695145.46397.415106.006100.527102.473113.757124.9291.14650.71934.45978.95249.44425.15353.942
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▇▇▆▅█▁▆▅▆▆▇▅▆▅▆-883.5131313.499863.589-7.985-496.931744.753-3909.708-162.107-482.6324.851181.837845.548-521.101-117.05-726.798190.965NANANANANANANANANANANANANANANANANANANANANANANA804.81-114.10318.87-12.252-436.269227.82-1254.477
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁▃▅▁▇▁▁▁█▃▁▁▄▁▁▂0.0749.7751500.00.02050.00.00.00.02500.0750.00.00.01000.00.00.0350.0NANA0.01000.0NANA0.0NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RepaymentsOfLongTermDebt us-gaap:CreditFacility,us-gaap:LongtermDebtType us-gaap:RevolvingCreditFacility,mgm:MGMChinaCreditFacilityNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ▁▁▁▁▁█▇▇▇█▇▇▇▇▇▇▇▇▁▁▁▁1.221.2371.2361.2331.23373.90466.12566.94868.41669.79963.29763.96165.33567.99962.28863.29763.24763.1820.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Dividends ▁▁▁▁▁█▇▇▇█1.221.2371.2361.2331.23373.90466.12566.94868.41669.799NA63.96165.33567.999NA63.29863.24763.182NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▄▂▁▁▁▅▆▅▄▁▃▃█▅▁▅▁▁▁220.392119.2690.00.00.0353.72392.719356.982281.8330.0149.999176.07594.864362.40.0327.50.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4865000.04919000.04943000.04933000.04933000.04932000.05031000.05139000.05263000.05372000.05275000.05319000.05379000.05568000.05663000.05655000.05750000.05745000.05741000.05728000.05656000.05651000.05648000.05632000.05631000.04913000.04913000.04909000.04907000.04906000.04904000.04898000.04896000.04894000.04892000.04890000.04889000.04889000.04888000.04886000.04886000.04886000.04885000.04412000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value486491494493493493503513526537527531537556566565575574574564491490489488488441
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value495494493493496518535537540554571580582580573570569569570575490513513489489492488488488488554488441441
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value489494493493495518532534535548564573574574568565565563551491490490490489489489488488488488488488441441
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value0.0018.4846.1835.373.8761.1082.4111.9292.4322.4410.171.9892.0783.2053.3623.1246.4564.2374.4494.627162.5342.6251718102223302818282626
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.14-0.69-0.92-1.08-1.671.643.94-0.080.080.05-0.060.260.210.392.430.260.370.360.040.940.840.12-1.380.120.180.35-0.7-0.040.220.22-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.257.04-0.18-0.29-0.72-2.0-0.22
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.14-0.69-0.92-1.08-1.671.643.91-0.080.080.05-0.060.260.210.382.40.260.360.360.040.930.830.12-1.380.120.170.33-0.7-0.040.210.21-0.08-0.07-0.190.01-2.5-0.37-0.3-0.44-0.23-0.256.22-0.18-0.29-0.72-2.0-0.22
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value108-332.083-442.353-535.071-861.2387772045-57.9134115-38.11715212821913991481941992653647364-781.8796697170-337.66-27.117108107-37.451-31.548-89.6320.225-1222.057-179.672-141.243-216.394-104.437-125.5423438-87.309-137.871-316.84-884.239
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.8-20.20.0-47.5-297.234.564.2-1.71.30.5-1.25.04.57.853.95.27.37.31.121.320.92.9-35.72.94.17.3-14.2-1.14.24.1-1.5-1.3-3.60.0-53.3-8.0-6.1-9.5-4.5-5.6190.4-5.8-9.3-20.2-57.1

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-10.213-1.579-3.733-66.81-82.074-157.35280283424213519363426184046263922-692.266292944596371827955659.82737277914103157.054
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-0.10.0-5.9-28.3-7.02.50.91.10.80.71.20.71.31.30.90.71.51.91.11.71.0-31.61.31.21.92.52.62.83.13.22.32.60.41.61.23.40.64.50.70.4

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value98-333.662-446.086-601.881-943.3126192126-29.0027640-16.36318714725614341742122397356251386-1474.14596127214-278.362361791904224-24.16210-1184.659-151.834-62.121-201.619-1.247-110.1033445-87.309-137.871-316.84-884.239
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.3-20.20.0-53.5-325.527.566.7-0.92.41.3-0.56.25.19.155.26.28.08.83.022.422.63.9-67.34.25.39.2-11.71.57.07.21.71.0-1.00.4-51.6-6.7-2.7-8.8-0.1-4.9190.8-5.8-9.3-20.2-57.1

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServicesSold

mgm:EntertainmentRetailAndOther


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10278698756199262274269243265263243226232254243
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.80.07.819.48.88.38.38.47.78.78.78.58.09.09.09.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:EntertainmentRetailAndOther54.158.00.086.2115.873.70.070.970.570.70.071.367.068.80.069.069.0

mgm:ReimbursedCosts


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value75589832169810610711111111010610410310010299
Percentage of CostOfGoodsAndServicesSold73.574.1140.736.928.849.340.339.341.245.941.740.443.045.543.040.340.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.50.02.95.64.43.33.33.43.53.63.53.73.73.93.63.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:ReimbursedCosts100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:Casino


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value616551504368200628917915888902876819741762704674627
Percentage of CostOfGoodsAndServicesSold603.8704.1722.4420.5356.4315.8349.0333.0329.1370.5329.6310.5304.7336.2302.5265.6257.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.233.50.032.769.127.928.827.627.628.428.727.025.927.027.123.823.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Casino46.250.20.053.4122.559.60.055.055.655.50.055.955.754.70.052.653.5

us-gaap:FoodAndBeverage


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value21413514013360339407427426400380391376353324373363
Percentage of CostOfGoodsAndServicesSold209.6172.5200.8152.9107.3170.6154.9155.5158.0164.3143.1148.2154.9155.8139.4147.2148.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.48.20.011.920.815.112.812.913.212.612.512.913.212.512.513.213.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FoodAndBeverage70.885.90.0106.0202.685.60.076.378.476.90.075.176.277.60.074.374.8

us-gaap:Occupancy


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1371049710741172205211208203193206202189180192187
Percentage of CostOfGoodsAndServicesSold134.4133.0140.3122.673.486.778.276.977.383.772.778.283.483.377.575.876.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.16.30.09.514.27.76.56.46.56.46.36.87.16.76.96.87.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Occupancy37.652.50.061.2130.439.80.035.535.635.50.036.436.035.00.033.634.5

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value208718681852164113151037242311228782845274926532543249424012370218122502210183419481908342920402079205421172221224622362198221922562066271820792154208122002121-1845.74813981358177425691387
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.0113.40.0145.8454.146.17.693.989.389.690.187.689.088.492.583.882.282.889.873.085.986.4156.589.587.288.188.889.487.185.087.590.190.987.9118.592.292.791.095.895.0-102.292.992.1113.2166.195.2

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-02-292012-03-312011-12-312010-12-31
Value0.00.2020.079-126.743-142.0-2.721-53.2110.0-1.4260.443-1.617-1.019-14.351-30.547-0.7980.0-0.029-16.783-49.46-0.6610.00.0-0.002-0.008-3.767-0.024-505.00.00.0-59.0-58.740.0-8.516
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.0-5.6-4.5-0.1-1.70.0-0.00.0-0.1-0.0-0.6-1.1-0.00.0-0.0-0.7-2.2-0.00.00.0-0.0-0.0-0.2-0.0-22.00.00.00.0-2.60.0-0.6

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType

us-gaap:SeniorNotes


Gains
Period End2020-12-312020-09-302020-03-31
Value0.00.0-105.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.082.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SeniorNotes0.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value125-430.636-562.872-678.705-1206.7259362622-1.172871379819016418041291315315107516522112-1403.5217812215640601211884515-26.71353-1279.038-157.259-121.738-176.178
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.5-26.10.0-60.3-416.441.682.3-0.02.74.33.26.35.76.41.610.311.911.64.420.523.05.1-64.03.45.16.71.72.44.77.21.80.6-1.12.3-55.7-7.0-5.2-7.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value34-94.698-106.904-76.734-270.238262556-7.2761171921923-85.379-1384.214115746237-44.9958.482169-16.493-3.772-56.30532810-52.54-3.5195.117-8.153.86530-90.541-2.585-51.30427-190.876-79.68-78.174-54.583-45.845-192.936-479.495-60.352
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.5-5.70.0-6.8-93.211.617.5-0.20.42.33.00.60.8-3.0-53.34.12.82.31.5-1.80.41.03.2-0.7-0.2-2.413.80.4-2.0-0.10.2-0.30.21.3-3.9-0.1-2.21.2-8.3-3.6-4.3-3.6-3.1-12.3-31.0-4.1

us-gaap:IncomeTaxExpenseBenefit us-gaap:IncomeTaxAuthority

country:MO


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.00.0-6.010.00.010.0
Percentage of IncomeTaxExpenseBenefit-0.0-0.0-2.3-137.40.014.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.30.30.00.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:MO0.00.00.00.00.00.0

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

country:MO, mgm:MGPBREITVenture


Income
Period End2020-09-302020-06-302020-03-31
Value0.00.0349
Percentage of IncomeTaxExpenseBenefit-0.0-0.0133.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.015.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:MO mgm:MGPBREITVenture0.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.299-2.401-0.0526.728-0.5722.439101113-6.429-1.882.447-13.6022.93523171382.564.9147.914504.601-19.6399.477174.7472.01314.6443.8640.029-0.576-2.3543.7360.4430.2934.4161.83-0.9861.145-174.091.9131.030-362.2730.74
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.2-0.10.00.6-0.20.10.30.30.4-0.2-0.10.1-0.50.10.90.65.20.10.20.32.20.2-0.90.40.70.20.11.30.20.10.0-0.0-0.10.20.00.00.20.1-0.00.1-9.60.10.11.9-23.40.1

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value202195188173156157200215215216214205181167157163174174161168180184186191203216200202203209208208214225279275276284274272270269273285291264
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.911.90.015.454.17.06.36.56.76.87.06.86.35.96.15.86.66.46.66.77.98.48.58.48.59.38.48.27.98.08.38.58.69.612.212.211.912.411.912.215.017.918.518.218.818.1

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value200146211139127162229182205209206192156168135180129212109203153195152225185213180203191200194209217218305260261211288208285220260259248251
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.90.012.444.07.27.25.56.46.66.86.35.56.05.26.44.97.84.58.16.78.86.99.97.89.27.68.27.47.67.78.58.89.313.311.611.39.312.59.315.814.617.716.516.117.3

Litigation Settlement Expense

us-gaap:LitigationSettlementExpense

us-gaap:LitigationSettlementExpense


Litigation
Period End2020-12-312020-09-302020-06-302019-06-30
Value0.00.0490.0
Percentage of LitigationSettlementExpense0.00.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.016.90.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value104-331.829-447.605-534.731-857.2578062011-37.1334331-23.32714212322313931492102062453547466-781.4546697169-342.263-20.27105108-56.805-31.859-92.9586.546-1223.827-181.159-145.452-217.253-3258.636-123.7863441-89.871-139.189-317.991-883.476-96.741
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.6-20.10.0-47.5-295.835.863.2-1.11.31.0-0.84.74.37.953.75.37.97.61.021.320.93.0-35.72.94.17.3-14.3-0.84.14.1-2.3-1.3-3.70.3-53.3-8.0-6.3-9.5-141.9-5.5190.6-6.0-9.4-20.3-57.1-6.6

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-14.449-4.109-8.363-67.24-79.23-132.3554433234292816423127314645254024-692.04328294254706883795562163526751394178.706
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.20.0-6.0-27.3-5.91.71.31.01.11.00.90.61.51.21.01.21.71.81.01.81.1-31.61.21.21.82.32.82.63.23.22.32.50.71.51.23.20.64.10.80.5

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value67-454.113-532.954-825.0758142014-40.2074427-29.91413811721813751492102062453547466-781.4546697169-38.335-31.859-92.9586.546-1223.827-181.159-145.452-217.253-113.691-123.7863441-89.871
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 RevenueFromContractWithCustomerExcludingAssessedTax3.00.0-47.3-284.736.263.3-1.21.40.9-1.04.64.17.853.05.37.97.61.021.320.93.0-35.72.94.17.3-1.5-1.3-3.70.3-53.3-8.0-6.3-9.5-4.9-5.5190.6-6.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312013-09-302012-09-30
Value67-454.092-532.979-825.0958142014-40.2374427-29.94113811721813751492102062453547466-31.89-181.159
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.00.0-47.3-284.736.263.3-1.21.40.9-1.04.64.17.752.95.37.97.61.021.320.93.0-1.3-8.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-138630000.0-183950000.0-199300000.0-183520000.0-172200000.0-314020000.0-337760000.0-239550000.0-283580000.0-232590000.0-237260000.0-220450000.0-198940000.0-178840000.0-182320000.0-202250000.0-185360000.0-181800000.0-174600000.0-196490000.0-246080000.0-203450000.0-206290000.0-219140000.0-225830000.0-238760000.0-225480000.0-225900000.0-218820000.0-224540000.0-284340000.0-232290000.0-258320000.0-248810000.0-854180000.0-294660000.0-297110000.0-368780000.0-301280000.0-298830000.0-311240000.0-314160000.0-292240000.0-305030000.0-314150000.0-145670000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.1-11.20.0-16.3-59.4-13.9-10.6-7.2-8.8-7.3-7.8-7.3-7.0-6.3-7.0-7.1-7.0-6.7-7.1-7.8-10.8-9.2-9.4-9.6-9.5-10.2-9.5-9.1-8.5-8.5-11.3-9.4-10.4-10.6-37.2-13.1-12.8-16.1-13.1-13.4-17.2-20.9-19.8-19.5-20.3-10.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value263-246.69-363.568-495.182-1034.52912502960238371370335410363359223493501497282712769315-1197.234297348395266286339412330247231301-424.856137175192911123683169107-205.901-1048.817-11.423
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.6-15.00.0-44.0-357.055.592.97.211.511.711.013.612.712.78.617.418.918.311.528.333.914.3-54.613.014.616.911.211.513.215.713.110.19.312.8-18.56.17.58.44.05.0204.011.37.3-13.1-67.8-0.8

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value5.811-13.022-1.4010.5380.2892833-18.60226-12.405-2.48121.4-24.152-1.875-3.004-25.376-12.9331.7221.734-1.37-4.765-0.6481.2910.6082.4769.11-13.5055.862-2.761.6450.5876.416-12.6414.2832.848.3131.68818-3.528
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.3-0.80.00.00.11.31.1-0.60.8-0.4-0.10.40.0-0.9-0.1-0.1-1.0-0.50.10.1-0.1-0.2-0.00.10.00.10.4-0.50.2-0.10.10.00.3-0.50.20.10.40.10.8-0.2

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value3.233-7.353-0.6420.4240.1221518-10.50914-6.9066.7060.583-13.368-1.635-14.018-7.352
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax55.656.545.878.842.255.856.156.555.955.754.941.655.354.455.256.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.40.00.00.00.70.6-0.30.5-0.20.20.0-0.5-0.1-0.5-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2.578-5.669-0.7590.1140.1671214-8.09311-5.4995.5040.817-10.784-0.885-1.369-11.358-5.5810.9040.815-0.557-2.365-0.2230.7350.2971.2154.507-6.6582.863-1.2430.7610.2763.09-6.2052.068
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax44.443.554.221.257.844.243.943.544.144.345.158.444.747.245.644.843.252.547.040.749.634.456.948.849.149.549.348.845.046.347.048.249.148.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.30.00.00.10.60.5-0.20.4-0.20.20.0-0.4-0.0-0.0-0.4-0.20.00.0-0.0-0.1-0.00.00.00.10.2-0.30.1-0.00.00.00.1-0.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value3.233-7.353-0.6420.4240.1221518-10.50914-6.9066.7060.583-13.368-0.99-1.635-14.018-7.3520.8180.918-0.813-2.4-0.4250.5560.3111.2614.603-6.8472.999-1.5170.8840.3113.326-6.4362.215
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax55.656.545.878.842.255.856.156.555.955.754.941.655.352.854.455.256.847.552.959.350.465.643.151.250.950.550.751.255.053.753.051.850.951.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.40.00.00.00.70.6-0.30.5-0.20.20.0-0.5-0.0-0.1-0.5-0.30.00.0-0.0-0.1-0.00.00.00.10.2-0.30.1-0.10.00.00.1-0.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value7.9012.2769.8820.09-6.825-54.7560-35.1060.082-25.728-22.123166.735-10.2968.761-1.688-28.699-13.5673.6011.734-1.37-4.765-0.6481.2910.6081.8049.11-13.5055.862-1.511.6450.5876.416-12.5263.8382.848.3131.68818-3.528
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.10.00.0-2.4-2.41.9-1.10.0-0.8-0.70.50.2-0.40.3-0.1-1.1-0.50.10.1-0.1-0.2-0.00.10.00.10.4-0.50.2-0.10.10.00.3-0.50.20.10.40.10.8-0.2

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value5.811-13.022-1.4010.5380.28928-18.60226-12.405
Percentage of OtherComprehensiveIncomeLossNetOfTax73.5-572.1-14.2597.8-4.2-51.853.032170.748.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.3-0.80.00.00.11.3-0.60.8-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.091511-0.448-7.114-83.086-16.504-26.298-13.323
Percentage of OtherComprehensiveIncomeLossNetOfTax26.5672.1114.2-497.8104.2151.847.0-32070.751.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.90.0-0.0-2.5-3.7-0.5-0.8-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7.9012.2769.8820.09-6.825-54.75-34.8370.257-26.268
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.099.2313.4102.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.10.00.0-2.4-2.4-1.10.0-0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value873212138.321-124.264-129.298-9.381-46.2761.693-6.552-3.291-6.381-1.916-16.535-30.138-0.751-0.817-4.983-17.31-49.84-0.565-3.279-4.386-4.815-3.49-5.8-0.254-0.309-1.434-2.153-0.676-4.951-1.282-552.8432.0120.046-57.576-1.103-1.595-13.017-3.9557.4757.2988.589141
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.92.00.01.22.9-5.5-4.1-0.3-1.40.1-0.2-0.1-0.2-0.1-0.6-1.1-0.0-0.0-0.2-0.7-2.2-0.0-0.1-0.2-0.2-0.1-0.2-0.0-0.0-0.1-0.1-0.0-0.2-0.1-24.10.10.0-2.5-0.0-0.1-0.7-0.30.50.50.69.7

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value90-335.938-455.968-601.971-936.48767420656.10476665.7617114026614251762412536956151491-1473.49794126212-287.472501731914023-30.57822-1188.497-154.674-70.434-203.307-19.301-106.5753450-89.871-139.189-317.991-883.476-96.741
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.0-20.40.0-53.5-323.129.964.90.22.42.10.25.74.99.454.96.29.19.32.822.322.74.1-67.24.25.39.1-12.12.06.77.31.61.0-1.21.0-51.8-6.9-3.0-8.9-0.8-4.8191.1-6.0-9.4-20.3-57.1-6.6

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenter


Profit
Period End2020-09-302019-09-30
Value-45.26733
Percentage of ProfitLoss7.5542.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:CityCenter0.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value226716471493112528922523185331432233176305230292858282225972830265227172460251522692209219122802385233223852485258126302513246324812352229422542323228722962233180515041475156715471457
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

mgm:CorporateAndReconcilingItems


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value96951134016121128134139210208191134127119121122120120116
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.35.87.63.65.75.44.04.04.36.66.86.34.74.54.64.34.64.44.94.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.35.87.63.65.75.44.04.04.36.66.86.34.74.54.64.34.64.44.94.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:CorporateAndReconcilingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value217115521379108527321313056318030832966284428372724269424782709252925882363239821462088207621652262220722732372246725112405235623712236
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.794.292.496.494.394.696.096.095.793.493.293.795.395.595.495.795.495.396.195.494.694.594.794.994.994.795.395.595.695.595.795.795.695.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.794.292.496.494.394.696.096.095.793.493.293.795.395.595.495.795.495.396.195.494.694.594.794.994.994.795.395.595.695.595.795.795.695.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13678627240207285300298269271296291271
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.04.74.26.514.09.29.09.19.38.58.99.810.29.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.04.74.26.514.09.29.09.19.38.58.99.810.29.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:EntertainmentRetailAndOther mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.4214.6093.9622.534.1483.4846.6996.4096.6886.3626.3125.0685.3494.6954.2922.3491.89
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.30.21.40.20.20.20.20.20.20.20.20.20.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.30.21.40.20.20.20.20.20.20.20.20.20.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:EntertainmentRetailAndOther mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value302322183.592385157514042463832
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.41.51.71.21.71.61.71.61.31.41.61.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.41.51.71.21.71.61.71.61.31.41.61.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:EntertainmentRetailAndOther mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value35323220118963274327336308324339345349372
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.614.113.516.821.712.210.310.19.610.211.111.412.213.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.614.113.516.821.712.210.310.19.610.211.111.412.213.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Casino mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2702612663523240650662633663611536496550481414397
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.915.917.93.18.010.720.420.019.620.920.017.717.419.518.514.615.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.915.917.93.18.010.720.420.019.620.920.017.717.419.518.514.615.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Casino mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value70759649046477536648660653574549526483467
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.236.232.841.326.623.820.419.920.318.118.017.416.916.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.236.232.841.326.623.820.419.920.318.118.017.416.916.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Casino mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value21590808121288361401389365332368361339
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.55.55.47.27.312.811.312.112.111.510.912.212.712.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.55.55.47.27.312.811.312.112.111.510.912.212.712.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:FoodAndBeverage mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1716166.244.431123332303034312820161111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.01.10.61.50.61.01.01.01.01.11.01.00.70.60.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.01.10.61.50.61.01.01.01.01.11.01.00.70.60.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:FoodAndBeverage mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value695046384.3149512512612311711411310595
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.13.13.41.54.24.03.83.83.73.83.83.73.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.13.13.41.54.24.03.83.83.73.83.83.73.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:FoodAndBeverage mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value29814413513726362455469469468432443451448
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.28.89.112.29.016.114.314.214.614.814.214.615.815.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.28.89.112.29.016.114.314.214.614.814.214.615.815.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Occupancy mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1713172.81.335153736353335323119141313
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.81.20.20.50.71.21.11.11.11.11.11.10.70.60.50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.81.20.20.50.71.21.11.11.11.11.11.10.70.60.50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Occupancy mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value484036344.181557390817175908171
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.52.43.11.42.52.32.72.52.32.53.02.82.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.52.43.11.42.52.32.72.52.32.53.02.82.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Occupancy mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mgm:LasVegasStripResorts


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1004544479481150113314291507146614281375145414541432
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.333.132.142.852.050.344.945.545.545.045.148.050.950.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.333.132.142.852.050.344.945.545.545.045.148.050.950.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:LasVegasStripResorts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mgm:MGMChina


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3102963044633271727737706734686606561595516442423502391499451469
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.718.020.44.211.512.122.822.321.923.122.520.019.621.119.915.616.018.515.919.919.921.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.718.020.44.211.512.122.822.321.923.122.520.019.621.119.915.616.018.515.919.919.921.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:MGMChina100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mgm:RegionalOperations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value85671159555689725899935910803782777708666
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.843.239.949.530.832.228.328.228.325.325.625.724.823.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.843.239.949.530.832.228.328.228.325.325.625.724.823.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mgm:RegionalOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

mgm:EntertainmentRetailAndOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1891359810148269362387382344349370363329315368353
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.38.26.69.016.812.011.411.711.910.811.512.212.711.712.113.013.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.38.26.69.016.812.011.411.711.910.811.512.212.711.712.113.013.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:EntertainmentRetailAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:ReimbursedCosts


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value75589832169810610711111111010610410310010299
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.56.62.95.64.43.33.33.43.53.63.53.73.73.93.63.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.56.62.95.64.43.33.33.43.53.63.53.73.73.93.63.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:ReimbursedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Casino


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value13361098963690163105416301663159816261561146513321394128912831172
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax58.966.764.561.356.546.851.250.249.651.251.148.446.649.449.645.344.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax58.966.764.561.356.546.851.250.249.651.251.148.446.649.449.645.344.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Casino100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FoodAndBeverage


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value30215714312629396520560544520488520494455413503485
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.39.69.611.210.317.616.316.916.916.416.017.217.316.115.917.818.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.39.69.611.210.317.616.316.916.916.416.017.217.316.115.917.818.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FoodAndBeverage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Occupancy


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value36519818917531433566595586574542566563539479572541
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.112.012.715.610.919.317.818.018.218.117.818.719.719.118.420.220.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.112.012.715.610.919.317.818.018.218.117.818.719.719.118.420.220.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Occupancy100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value226716471493112528922523185331432233176305230292858282225972830265227172460251522692209219122802385233223852485258126302513246324812352229422542323228722962233180515041475156715471457
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenter


Revenuesus-gaap:
Period End2020-09-302019-09-30
Value126320
Percentage of Revenues11.39.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.39.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:CityCenter0.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value590546531543473574557494524525444463438417414402354388376371321308319309303307304301269277292282276
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.033.235.648.3163.425.517.514.916.316.514.615.315.314.816.014.213.414.315.314.814.214.014.213.313.313.413.616.717.918.818.718.318.9

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3677637330364943700437471391183387631168308133114630210299732897729298291592910128542283032817327705265492549725215266802714926798267022544825572253502611025658257222605726284278312726327391277662785327216187601896122518
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets dei:LegalEntity

mgm:MGMGrowthPropertiesLimitedLiabilityCompany


Assetsdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1010010100106001070010800119001190011900119001230011000110001030010300104001010094009400950095008200
Percentage of Assets27.527.129.028.928.830.435.138.238.639.536.436.735.535.235.734.732.933.233.734.330.9
Percentage of Assets27.527.129.028.928.830.435.138.238.639.536.436.735.535.235.734.732.933.233.734.330.9
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities dei:LegalEntity

us-gaap:Liabilities

mgm:MGMGrowthPropertiesLimitedLiabilityCompany


Liabilitiesdei:
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value5000500050004400500055005500560051005100430043004300430039003900390039003200
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.613.413.711.914.817.617.818.016.917.014.814.714.714.813.713.813.814.112.1
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany49.549.547.241.142.046.246.245.546.446.441.741.741.342.641.541.541.141.139.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3677637330364943700437471391183387631168308133114630210299732897729298291592910128542283032817327705265492549725215266802714926798267022544825572253502611025658257222605726284278312726327391277662785327216187601896122518
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value6180630665046861737481737727606065206786651267736847737076126308651163766220619055325199511959015828427340904420445743434231426242894372436555535725587860866248636529192998387039746060
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.816.917.818.519.720.922.819.421.221.821.622.623.625.226.121.722.822.522.122.320.820.420.322.121.515.915.317.417.417.116.216.616.716.816.620.021.021.521.922.423.415.615.817.20.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value65747083595061866370759740072880204022072526220820832392237427942485217222292214319324012408258232672956302719912166197027192284221024392507334726772593281227211793136614553053
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.919.016.316.717.019.411.89.26.67.18.47.47.28.28.19.68.77.77.98.012.09.49.69.712.011.011.37.88.57.810.48.98.69.49.512.09.89.510.19.86.67.37.713.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312013-01-092012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value5626617151014593483560162329123311601223152613021272152514991986175713951446144625031664167018072342219517131313136511141803137512781480154315432443173116341865181592143149855210134402056295416
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.316.514.012.412.915.46.94.03.83.95.14.34.45.25.16.86.24.95.15.29.46.56.66.88.68.26.45.25.34.46.95.45.05.70.05.98.86.46.06.76.53.42.32.60.00.00.09.10.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterAndMGPBREITVenture


Cash
Period End2020-12-312019-12-31
Value96246
Percentage of CashAndCashEquivalentsAtCarryingValue1.910.6
Percentage of Assets0.30.7
Percentage of Assets mgm:CityCenterAndMGPBREITVenture0.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value562661715101459348356016232912331160122315261302127215251499198614461670
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.316.514.012.412.915.46.94.03.83.95.14.34.45.25.16.85.16.6

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value430360316328287454612550562602657546497505540515469493542492443452480473488
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.00.90.90.81.21.81.81.81.92.21.81.71.71.91.81.61.71.91.81.71.81.91.81.9

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value798288971061061021041061111101041091071021011031009797979710410010610310499102101107981011051071071131101121041059596101
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.30.30.30.30.30.30.40.40.30.40.40.40.30.40.40.30.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.5

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value212227200245223240200233188251203234180212189191148183142177137177137187136188151144224261238272248258232243231270251259245252
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.60.70.60.60.60.70.60.80.70.80.60.70.60.70.50.60.50.60.50.70.50.70.50.70.60.60.91.00.91.11.01.00.90.90.81.00.90.90.91.3

Noncurrent Assets

us-gaap:NoncurrentAssets

us-gaap:NoncurrentAssets


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-31
Value28653285892649525319
Percentage of NoncurrentAssets100.0100.0100.0100.0
Percentage of Assets78.584.487.786.8

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

country:US


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-31
Value21035205821822816863
Percentage of NoncurrentAssets73.472.068.866.6
Percentage of Assets57.660.860.357.8
Percentage of Assets country:US0.00.00.00.0

us-gaap:NonUs


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-31
Value7617800782668456
Percentage of NoncurrentAssets26.628.031.233.4
Percentage of Assets20.923.627.429.0
Percentage of Assets us-gaap:NonUs0.00.00.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2190526774297472788525993223112096620220199072020319385
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.079.098.595.692.388.578.577.475.772.8102.2

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

mgm:FurnitureFixturesAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value56005924606451574863427441784040399539263768
Percentage of PropertyPlantAndEquipmentGross25.622.120.418.518.719.219.920.020.119.419.4
Percentage of Assets15.317.520.117.717.317.015.615.515.214.119.9
Percentage of Assets mgm:FurnitureFixturesAndEquipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value17020932139502628211199943714012272
Percentage of PropertyPlantAndEquipmentGross0.80.81.114.210.19.54.82.20.70.60.4
Percentage of Assets0.50.61.113.59.38.43.71.70.50.40.4
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value40815348692365316530649564756477649970327039
Percentage of PropertyPlantAndEquipmentGross18.620.023.323.425.129.130.932.032.634.836.3
Percentage of Assets11.215.822.922.423.225.824.224.824.725.337.1
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LandBuildingsAndImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1205315291164371224511969942993139264927291228504
Percentage of PropertyPlantAndEquipmentGross55.057.155.343.946.142.344.445.846.645.243.9
Percentage of Assets33.045.154.442.042.537.434.935.535.332.944.9
Percentage of Assets us-gaap:LandBuildingsAndImprovements0.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value74748581901782507568693965256165571353374831
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.525.329.828.326.927.524.423.621.719.225.5

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1434414454146321479214977151721828520603210542119620729207331986319711196351913418896186191842517948161021569215371150141479114561144411425314113140341405513969140421411714194147651478314786148661486815017144261455415069
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.038.740.140.040.038.854.066.168.368.168.669.268.567.367.365.866.265.865.464.860.761.561.056.354.554.354.156.055.255.453.854.454.654.254.053.154.254.053.553.455.276.976.866.9

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterAndMGPBREITVenture


Property
Period End2020-12-312019-12-31
Value102375937
Percentage of PropertyPlantAndEquipmentNet70.032.5
Percentage of Assets28.117.5
Percentage of Assets mgm:CityCenterAndMGPBREITVenture0.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value148414391447147314681596822758746730732666882105010341007980125212201196136414781491153614911661155915551420141613741416140814351444148814981589163516591690194119233611
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.03.94.04.03.94.12.42.42.42.32.42.23.03.63.53.53.44.44.34.35.15.85.95.85.56.25.86.15.65.65.35.55.55.55.55.35.55.85.96.06.210.410.116.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:BellagioBlackstoneRealEstateIncomeTrust


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value59606060606161
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures4.04.24.14.14.13.87.4
Percentage of Assets0.20.20.20.20.20.20.2
Percentage of Assets mgm:BellagioBlackstoneRealEstateIncomeTrust0.00.00.00.00.00.00.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:BetMGMLLC


Investments
Period End2021-06-302021-03-312020-12-31
Value224327
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures1.53.01.9
Percentage of Assets0.10.10.1
Percentage of Assets mgm:BetMGMLLC0.00.00.0

mgm:CityCenterHoldingsLLCAsInvestee


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value515432441454468567568553528575589573663827809793766103810071136
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures34.730.130.530.931.935.569.273.070.878.880.586.175.278.878.278.778.182.982.576.2
Percentage of Assets1.41.21.21.21.31.41.71.81.71.82.01.92.32.82.82.72.73.73.64.5
Percentage of Assets mgm:CityCenterHoldingsLLCAsInvestee0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mgm:MGPBREITVenture


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8138208108078058030.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures54.857.056.054.854.950.30.0
Percentage of Assets2.22.22.22.22.12.10.0
Percentage of Assets mgm:MGPBREITVenture0.00.00.00.00.00.00.0

mgm:OtherUnconsolidatedAffiliates


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1331431952111942252532051448069192022241414129.1617.739
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures9.010.013.514.313.214.230.827.019.311.09.53.02.42.12.31.41.41.00.80.5
Percentage of Assets0.40.40.50.60.50.60.70.70.50.30.20.10.10.10.10.00.00.00.00.0
Percentage of Assets mgm:OtherUnconsolidatedAffiliates0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value20892087209120912091209120842076208020011821182218011800180618071807181418171815142914291430289828982898289728932898289628972900290028982902290129002897289629052906868686
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.75.65.75.75.65.36.26.76.86.46.06.16.26.16.26.26.36.46.46.65.45.65.710.910.710.810.811.411.311.411.111.311.311.111.010.410.610.610.410.410.70.50.50.4

us-gaap:Goodwill us-gaap:StatementBusinessSegments

mgm:LasVegasStripResorts


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3030707070
Percentage of Goodwill1.51.53.93.93.9
Percentage of Assets0.10.10.20.20.3
Percentage of Assets mgm:LasVegasStripResorts0.00.00.00.00.0

mgm:MGMChina


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1359135213451348135913592826
Percentage of Goodwill65.064.973.974.774.895.097.6
Percentage of Assets3.74.04.54.64.85.410.6
Percentage of Assets mgm:MGMChina0.00.00.00.00.00.00.0

mgm:RegionalOperations


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value701701386386386
Percentage of Goodwill33.533.721.221.421.3
Percentage of Assets1.92.11.31.31.4
Percentage of Assets mgm:RegionalOperations0.00.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value677678638410410327330330332332
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.02.11.41.51.31.21.31.31.2

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

mgm:TrademarksAndOther


Indefinite
Period End2020-12-312019-12-31
Value299300
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill44.244.3
Percentage of Assets0.80.9
Percentage of Assets mgm:TrademarksAndOther0.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value35453586364336973746379538263866392240463944399137763819387739243972403340874137407241164164421242564309436443314396445145114548460946664737481348894965504851205209342342344
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.69.610.010.010.09.711.312.412.713.013.113.313.013.013.313.513.914.314.514.915.316.116.515.815.716.116.317.017.217.617.317.717.917.918.017.317.918.118.218.419.11.81.81.5

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value2966314833063467367738374034418144054715478748769.034
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.19.310.911.913.115.215.116.016.817.017.217.90.0

us-gaap:FiniteLivedIntangibleAssetsNet dei:LegalEntity

mgm:MGMNationalHarborAndMGMSpringfieldGamingLicenses


Finite
Period End2020-12-312019-12-31
Value8794
Percentage of FiniteLivedIntangibleAssetsNet2.93.0
Percentage of Assets0.20.3
Percentage of Assets mgm:MGMNationalHarborAndMGMSpringfieldGamingLicenses0.00.0

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

mgm:MGMGrandParadise, mgm:GamingSubconcession


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value284430043126329834893657
Percentage of FiniteLivedIntangibleAssetsNet95.995.494.695.194.995.3
Percentage of Assets7.88.910.311.312.414.5
Percentage of Assets mgm:MGMGrandParadise mgm:GamingSubconcession0.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value34102105109111112112287.6148.3238.588.6789.034
Percentage of FiniteLivedIntangibleAssetsNet1.23.33.23.13.02.92.80.70.20.20.20.2100.0
Percentage of Assets0.10.30.30.40.40.40.40.10.00.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-31
Value379
Percentage of DeferredTaxAssetsLiabilitiesNet100.0
Percentage of Assets1.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value82088240828683308379842543926506646410.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets22.322.122.722.522.421.513.02.12.22.10.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:Subsegments

mgm:Bellagio


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value360037003700370037003700
Percentage of OperatingLeaseRightOfUseAsset43.944.944.644.444.284.2
Percentage of Assets9.89.910.110.09.910.9
Percentage of Assets mgm:Bellagio0.00.00.00.00.00.0

mgm:MandalayBayAndMGMGrandLasVegas


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value400040004000409941000.0
Percentage of OperatingLeaseRightOfUseAsset48.748.548.349.248.90.0
Percentage of Assets10.910.711.011.110.90.0
Percentage of Assets mgm:MandalayBayAndMGMGrandLasVegas0.00.00.00.00.00.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value528438443432436438456331304322455551570522430433400410393393386377347435445411412423576581551539551500497515514557506577598596598352
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.21.21.21.21.11.31.11.01.01.51.82.01.81.51.51.41.51.41.41.51.51.41.61.61.51.51.72.32.32.12.12.11.91.91.91.92.01.82.12.23.23.21.6

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-30
Value124
Percentage of EquitySecuritiesFvNi100.0
Percentage of Assets0.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value210160142150122202235253277336302301268253255242206204250232161183182168174187164266253220241202229178199201171163170158179138167173
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.40.40.40.30.50.70.80.91.11.01.00.90.90.90.80.70.70.90.80.60.70.70.60.60.70.61.01.00.90.90.80.90.70.80.70.60.60.60.60.70.70.90.8

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiabilityCurrent

mgm:CustomerAdvancesAndOther


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value513407382359306371481444588613667563510492539429425400437
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.11.01.00.80.91.41.41.92.02.21.91.81.71.91.51.51.41.6
Percentage of Assets mgm:CustomerAdvancesAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mgm:LoyaltyProgram


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value13613313913813112812612512011911310598939191888888
Percentage of ContractWithCustomerLiabilityCurrent26.632.736.638.642.934.626.428.220.619.417.018.719.219.016.921.420.722.220.2
Percentage of Assets0.40.40.40.40.40.30.40.40.40.40.40.40.30.30.30.30.30.30.3
Percentage of Assets mgm:LoyaltyProgram0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mgm:OutstandingChipLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value144170212350338301314328322307323550759779597317319290227
Percentage of ContractWithCustomerLiabilityCurrent28.241.755.697.5110.381.165.473.854.850.248.597.7148.6158.2110.873.975.272.652.0
Percentage of Assets0.40.50.60.90.90.80.91.11.01.01.11.82.62.72.01.11.11.00.8
Percentage of Assets mgm:OutstandingChipLiability0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Dividends Payable Current

us-gaap:DividendsPayableCurrent

us-gaap:DividendsPayableCurrent


Dividends
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6453312922
Percentage of DividendsPayableCurrent100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.10.10.1

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value20361835185627662575262631913293278628122948297730643586309227352679212422932130191720882237195227901895340733692560215922152161209818701925202519291892174420151585117212462383
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.54.95.17.56.96.79.410.69.09.09.89.910.612.210.69.49.47.58.17.77.28.28.97.310.37.112.813.210.08.58.58.48.27.27.37.37.16.96.37.25.86.26.610.6

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value31293135363367
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.2

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1652272601782151475126212331311136212621327157417091764168317701772166714831517157413641413136212611202867
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.70.90.60.85.34.84.85.25.14.75.05.96.76.96.66.86.96.55.75.85.75.05.24.94.54.44.6

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312011-03-312010-12-312009-12-31
Value16421474154516361497153820242000214020862151216122372233206816611599151515941311795867923
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.54.04.24.44.03.96.06.46.96.77.17.27.77.67.15.75.65.45.75.24.24.64.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value1257413245123761141411339117431116814943146611473315131146631351313282129091349313197130991298712786123641292912696128211337014551141591291512923129301344713034131111369013589138251336613359134701345012047
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.235.533.930.830.330.033.047.947.647.350.148.946.645.344.346.446.246.346.146.246.650.750.448.149.254.353.050.850.551.051.550.851.052.551.749.749.048.848.548.363.5

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1257413245123761141411339117431116814943146611473015088146631351312742127511302612725130991297912786123641268612368128211249514551129131172312606129301344713034131111369013589138251322513359134701309912630120811204712976
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.235.533.930.830.330.033.047.947.647.349.948.946.643.543.744.844.646.346.146.246.649.849.148.146.054.348.446.149.351.051.550.851.052.551.749.748.548.848.547.046.464.463.557.6

us-gaap:LongTermDebtNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterAndMGPBREITVenture


Long
Period End2020-12-312019-12-31
Value47151734
Percentage of LongTermDebtNoncurrent38.115.5
Percentage of Assets12.95.1
Percentage of Assets mgm:CityCenterAndMGPBREITVenture0.00.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value217021542153216422422106
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0
Percentage of Assets5.95.85.95.86.06.2

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value49234925467548414973515849354460443444313957397239924029403440163719376437493726399426652644333833483379353734773484347936443564356835063750371236863612379536923679
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.413.212.813.113.313.214.614.314.414.213.113.313.813.813.813.813.013.313.313.515.010.510.512.512.312.613.213.713.613.714.013.913.913.514.313.313.513.213.713.313.5

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent dei:LegalEntity, us-gaap:BalanceSheetLocation

us-gaap:OtherLiabilitiesNoncurrent

mgm:GrandParadiseMacau, mgm:OtherLongTermObligations


Other
Period End2020-12-31
Value34
Percentage of OtherLiabilitiesNoncurrent100.0
Percentage of Assets0.1
Percentage of Assets mgm:GrandParadiseMacau mgm:OtherLongTermObligations0.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value84038392839083808376837442775185295100.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets22.922.523.022.622.421.412.61.71.71.60.0

us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:Subsegments

mgm:Bellagio


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value380038003800380038003700
Percentage of OperatingLeaseLiabilityNoncurrent45.245.345.345.345.486.5
Percentage of Assets10.310.210.410.310.110.9
Percentage of Assets mgm:Bellagio0.00.00.00.00.00.0

mgm:MandalayBayAndMGMGrandLasVegas


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value409940994099409941000.0
Percentage of OperatingLeaseLiabilityNoncurrent48.848.948.948.948.90.0
Percentage of Assets11.111.011.211.110.90.0
Percentage of Assets mgm:MandalayBayAndMGMGrandLasVegas0.00.00.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value628625616615
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets1.71.71.71.7

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value638635625625
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets1.71.71.71.7

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value647644635635
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets1.81.71.71.7

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value644
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets1.8

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value19801
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets54.3

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value8435842284218415841384084345588608573580
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.922.623.122.722.521.512.81.92.01.80.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value22640227812293623085
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets61.661.062.862.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value14204143591451414669
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets38.638.539.839.6

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value6180630665046861737481737727606065206786651267736847737076126308651163766220619055325199511959015828427340904420445743434231426242894372436555535725587860866248636529192998387039746060
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.816.917.818.519.720.922.819.421.221.821.622.623.625.226.121.722.822.522.122.320.820.420.322.121.515.915.317.417.417.116.216.616.716.816.620.021.021.521.922.423.415.615.817.20.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value111041123211179117021234813332126621052010954112171046910746108391140011646103241023010140996999179526786577649239917676537628789879417822787578277857787981169265941294919882994110045299838043907
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.230.130.631.633.034.137.433.835.636.034.735.937.438.939.935.535.835.835.435.835.930.830.834.633.828.628.631.031.130.930.230.530.530.230.933.334.534.735.635.736.915.816.90.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value1717118.2758.2753.553.3741.0760.8070.6321.1721.1721.1721.1721.1721.1831.0741.0741.0740.00.672
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.20.20.10.10.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value8.8445.61112131313-2.747-21.533-11.024-25.778-18.872-17.529-24.235-24.818-11.45-10.46-8.8255.193121412
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.00.10.10.10.1-0.0-0.2-0.1-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.10.10.10.20.2
Percentage of Assets0.00.00.00.00.00.0-0.0-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.0-0.0-0.00.00.00.10.0
Percentage of Assets us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value-47.826-48.258-55.357-61.251-60.487-56.384-10.829-26.384-16.1130.5389.14422196.6681.434
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.4-0.4-0.5-0.5-0.5-0.4-0.1-0.3-0.10.00.10.20.20.10.0
Percentage of Assets-0.1-0.1-0.2-0.2-0.2-0.1-0.0-0.1-0.10.00.00.10.10.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-21.173-25.218-30.677-39.37-39.03-39.774-10.202-46.841-26.33-24.608-8.5566.234-3.237-7.48-3.61-9.84-9.1487.21715141212145.978-3.276-1.52-0.301-1.937-56.901
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.2-0.2-0.3-0.3-0.3-0.3-0.1-0.4-0.2-0.2-0.10.1-0.0-0.1-0.0-0.1-0.10.10.20.20.20.20.20.1-0.0-0.0-0.0-0.1-1.5
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.2-0.1-0.1-0.00.0-0.0-0.0-0.0-0.0-0.00.00.10.10.00.00.10.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value33353569343933553333327435313846418144204092425144134999535753905677567456535655418041564132409440854077406034974018
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest30.031.830.828.727.024.627.936.638.239.439.139.640.743.946.052.255.556.056.772.854.852.850.941.441.140.6135.491.9102.8
Percentage of Assets9.19.69.49.18.98.410.412.313.614.213.514.215.217.118.418.519.920.020.122.415.715.915.714.714.715.021.415.50.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value-21.173-25.218-30.677-39.37-39.03-39.774-10.202-46.841-26.33-24.608-8.5566.234-3.237-7.48-3.61-9.84-9.1487.217151412
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.2-0.2-0.3-0.3-0.3-0.3-0.1-0.4-0.2-0.2-0.10.1-0.0-0.1-0.0-0.1-0.10.10.20.20.2
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.2-0.1-0.1-0.00.0-0.0-0.0-0.0-0.0-0.00.00.10.10.0
Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value4.8654.9194.9434.9334.9334.9325.0315.1395.2635.3725.2755.3195.3795.5685.6635.6555.755.7455.7415.6484.9134.9044.8924.8884.8864.8864.8854.4123.693
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.10.10.10.10.10.10.10.10.00.00.00.20.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value49234925467548414973515849354460443444313957397239924029403440163719376437493726399426652644333833483379353734773484347936443564356835063750371236863612379536923679
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest44.343.941.841.440.338.739.042.440.539.537.837.036.835.334.638.936.437.137.637.641.933.934.136.136.544.246.444.043.944.546.345.545.444.546.240.139.238.138.437.136.6
Percentage of Assets13.413.212.813.113.313.214.614.314.414.213.113.313.813.813.813.813.013.313.313.515.010.510.512.512.312.613.213.713.613.714.013.913.913.514.313.313.513.213.713.313.5
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value61806306650468617374817377276060652067866512677368477370761262796482634862206190553251995119590158284273409044204457434342314262428943724365555357255878608662486365299838043907
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest55.756.158.258.659.761.361.057.659.560.562.263.063.264.765.460.863.462.662.462.458.166.165.963.963.555.853.656.056.155.553.754.554.655.553.859.960.861.961.662.963.4100.0100.0100.0
Percentage of Assets16.816.917.818.519.720.922.819.421.221.821.622.623.625.226.121.622.722.422.122.320.820.420.322.121.515.915.317.417.417.116.216.616.716.816.620.021.021.521.922.423.415.816.90.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value286127573091353940754934420122552359238424232510243123722252893808661545-555.629-107.90941213198121612285-1066.8653043298
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest25.824.627.630.233.037.033.221.421.521.323.123.422.420.819.38.77.96.55.5-7.2-1.40.52.620.121.722.7-35.68.084.4
Percentage of Assets7.87.48.59.610.912.612.47.27.77.78.08.48.48.17.73.12.82.31.9-2.2-0.40.20.87.17.88.4-5.61.40.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4865000.04919000.04943000.04933000.04933000.04932000.05031000.05139000.05263000.05372000.05275000.05319000.05379000.05568000.05663000.05655000.05750000.05745000.05741000.05728000.05656000.05651000.05648000.05632000.05631000.04913000.04913000.04909000.04907000.04906000.04904000.04898000.04896000.04894000.04892000.04890000.04889000.04889000.04888000.04886000.04886000.04886000.04885000.04412000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value33353569343933553333327435313846418144204092425144134999535753905677567456535651553056715655565556494192418041734166416041564150414541394132409840914102409440854077406840603497
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.19.69.49.18.98.410.412.313.614.213.514.215.217.118.418.519.920.020.120.420.822.222.421.220.815.615.716.416.316.415.916.216.115.915.714.715.015.014.714.715.021.721.415.5

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value286127573091353940754934420122552359238424232510243123722252922836689545521-14.477-488.83-555.62922515961-107.9092342701655795127220213143716181764198121612285-1156.736-1066.865370
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.87.48.59.610.912.612.47.27.77.78.08.48.48.17.73.22.92.41.91.9-0.1-1.9-2.20.80.60.2-0.40.91.10.70.20.40.50.80.85.25.96.47.17.88.4-6.2-5.61.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-21.173-25.218-30.677-39.37-39.03-39.774-10.202-46.841-26.33-24.608-8.5566.234-3.237-7.48-3.61-9.84-9.1487.2171512101114141313128.38815121211117.9821412116.8375.978-3.276-1.522.261-0.301-1.937
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.2-0.1-0.1-0.00.0-0.0-0.0-0.0-0.0-0.00.00.10.00.00.00.10.10.10.10.00.00.10.00.00.00.00.00.10.00.00.00.0-0.0-0.00.0-0.0-0.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value49234925467548414973515849354460443444313957397239924029403440163719376437493726399426652644333833483379353734773484347936443564356835063750371236863612379536923679
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.413.212.813.113.313.214.614.314.414.213.113.313.813.813.813.813.013.313.313.515.010.510.512.512.312.613.213.713.613.714.013.913.913.514.313.313.513.213.713.313.5

Stock Issued During Period Value New Issues

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

us-gaap:StockIssuedDuringPeriodValueNewIssues

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, us-gaap:CommonClassA


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-30
Value1116470.00.00.05075278262528361
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.0

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

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


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.3712.8680.00.00.00.6460.20.105-0.774
Percentage of StockIssuedDuringPeriodValueNewIssues0.30.40.00.00.00.10.20.2-0.1
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.0

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


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-30
Value0.3712.8680.00.00.00.6461.9810.20.105-0.7740.109
Percentage of StockIssuedDuringPeriodValueNewIssues0.30.40.00.00.00.10.40.20.2-0.10.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

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


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-30
Value16830.00.00.06470129.9055735
Percentage of StockIssuedDuringPeriodValueNewIssues15.012.80.00.00.012.613.415.015.910.89.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

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


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.3712.8680.00.00.00.6460.20.105-0.774
Percentage of StockIssuedDuringPeriodValueNewIssues0.30.40.00.00.00.10.20.2-0.1
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.0

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


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-30
Value945610.00.00.04424547052472326
Percentage of StockIssuedDuringPeriodValueNewIssues84.686.70.00.00.087.286.284.883.989.390.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.0

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


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-30
Value17860.00.00.0647212105635
Percentage of StockIssuedDuringPeriodValueNewIssues15.413.30.00.00.012.813.815.216.110.79.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value101629211836241517321717161615151516131212129.721101011108.6718.4638.6687.628.1948.9410101211
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312011-12-312011-09-30
Value9.6841527191735231315301516141313141110
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue89.293.795.189.994.096.694.890.793.796.393.092.391.591.191.893.694.394.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1.1741.0461.432.2091.1381.2721.2531.4291.0731.1861.191.3771.3751.3791.3661.2261.021.1371.1591.0070.8440.9540.9751.2571.3521.2891.2930.9680.7160.7070.6920.8260.8230.8370.7050.6970.6230.70.66
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue10.86.34.910.16.03.45.29.36.33.77.07.78.58.58.98.26.46.88.37.87.07.810.012.212.611.712.611.28.58.29.110.19.28.26.80.00.05.75.9
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value9.6841527191735231315301516141413131415121111118.7469.0359.359.7198.9337.7037.7477.9616.9287.3688.1179.3919.64410111110
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue89.293.795.189.994.096.694.890.793.796.393.092.391.591.591.191.893.693.291.792.293.092.290.087.887.488.387.488.891.591.890.989.990.891.893.20.00.094.394.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value3.293.112661.044197.9625126135.13317249.7913027422.0442445302.2672.66640612020.98771672470.0594.3572540.02.7326.4391980.996
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0
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

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

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, us-gaap:CommonClassA


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value80750.0016464628.619444342313029282222
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders2452.12438.80.06138.4326.9783.616.9169.1315.8819.5176.1125.5304.1103.653.21090.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

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


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value80750.0016464628.619444342313029282222
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders2452.12438.80.06138.4326.9783.616.9169.1315.8819.5176.1125.5304.1103.653.21090.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mgm:MGMGrowthPropertiesLimitedLiabilityCompany us-gaap:CommonClassA us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value3.293.112661.044197.9625126135.13317249.7913027422.0442445302.2672.66640612020.98771672470.0594.3572540.02.7326.2251980.996
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.096.7100.1100.0
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:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value456-87.61-243.438-164.103-662.565-422.9374543885683993273025155776945721842722312330394-44.909
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.1-5.3-16.3-14.6-228.6-18.814.311.717.612.610.710.018.020.526.720.28.215.11.68.41.925.5-3.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-118.81-154.912-112.25-69.561-21.56623624548-151.688-150.754-726.811-284.329-1119.259-247.056-432.377-453.978-533.836-95.269331-110.537-165.157-54.736-49.952-316.234
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.2-9.4-7.5-6.2-7.4104.9142.8-4.6-4.7-22.9-9.3-36.9-8.6-15.3-17.5-18.9-4.318.4-7.3-11.2-3.5-3.2-21.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-883.5131313863-7.985-496.931744-3909.708-162.107-482.6324181845-521.101-117.05-726.798190804-114.10318-12.252-436.269227-1254.477
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-39.079.757.8-0.7-171.577.4-122.7-4.9-15.00.86.027.9-18.2-4.1-28.06.736.0-6.31.3-0.8-27.814.7-86.1

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-545.281069507-241.633-1180.9123686109672-62.813-303.35822429-252.5325-486.693
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-24.064.934.0-21.5-407.5163.734.42.2-1.9-9.57.31.0-8.80.9-18.7

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11-80.293-31.286-79.668-147.92277542-15.8280.786671051218-89.746-1360.3468222-9.029.03-52.114-45.1977.653102-25.535-12.04-68.6483259.4314.585-7.6371.615-11.8416.01863-66.285-7.235-1.821-41.862-171.806-76.5-80.713-65.418-46.91-237.995-440.28391
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9245-767.70655-111.884-136.22570735-31.119-48.961117571.231-27.3883149-27.008-36.2235712-14.64-22.7471715236.3554-31.642-4.2221475-29.033-32.2274531-50.922135.243471002.5224.4864.798-2.73836-21.187
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3356000.0-5911000.0-9013000.0-9476000.0462000.03322000.01212000.0-2621000.0-4690000.0-423000.06403000.0-5471000.01814000.05114000.01058000.0-1871000.02673000.02796000.0329000.0-4751000.0218000.0-6602000.03704000.0-3952000.03628000.0-731000.05341000.0-3117000.0958000.0-6349000.09574000.0-2782000.0-3947000.0-2509000.0-202000.0-5549000.02629000.0-2061000.08433000.0-1035000.01935000.0-1294000.02912000.0-3326000.0438000.0-5442000.0
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value456-87.61-243.438-164.103-662.565-422.9374543885683993273025155776945721842722312330394-44.909
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.1-5.3-16.3-14.6-228.6-18.814.311.717.612.610.710.018.020.526.720.28.215.11.68.41.925.5-3.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value104-331.829-447.605-534.731-857.2578062011-37.1334331-23.32714212322313931492102062453547466-781.4546697169-342.263-20.27105108-56.805-31.859-92.9586.546-1223.827-181.159-145.452-217.253-3258.636-123.7863441-89.871-139.189-317.991-883.476-96.741
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.6-20.1-30.0-47.5-295.835.863.2-1.11.31.0-0.84.74.37.953.75.37.97.61.021.320.93.0-35.72.94.17.3-14.3-0.84.14.1-2.3-1.3-3.70.3-53.3-8.0-6.3-9.5-141.9-5.5190.6-6.0-9.4-20.3-57.1-6.6

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value90-335.938-455.968-601.971-936.48767420656.10476665.7617114026614251762412536956151491-1473.49794126212-287.472501731914023-30.57822-1188.497-154.674-70.434-203.307-19.301-106.5753450-89.871-139.189-317.991-883.476-96.741
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.0-20.4-30.5-53.5-323.129.964.90.22.42.10.25.74.99.454.96.29.19.32.822.322.74.1-67.24.25.39.1-12.12.06.77.31.61.0-1.21.0-51.8-6.9-3.0-8.9-0.8-4.8191.1-6.0-9.4-20.3-57.1-6.6

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenter


Profit
Period End2020-09-302019-09-30
Value-45.26733
Percentage of ProfitLoss7.5542.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mgm:CityCenter0.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10162921183624151732191717161615151516131212128.3987.3797.9328.6239.4289.336101011109.3969.218.8328.5998.0029.555
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-118.81-154.912-112.25-69.561-21.56623624548-151.688-150.754-726.811-284.329-1119.259-247.056-432.377-453.978-533.836-95.269331-110.537-165.157-54.736-49.952-316.234
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.2-9.4-7.5-6.2-7.4104.9142.8-4.6-4.7-22.9-9.3-36.9-8.6-15.3-17.5-18.9-4.318.4-7.3-11.2-3.5-3.2-21.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10478933767732561611381832623624434184645264164566726195434274664063012922542471771921821361459710610010211312491503478492553
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-883.5131313863-7.985-496.931744-3909.708-162.107-482.6324181845-521.101-117.05-726.798190804-114.10318-12.252-436.269227-1254.477
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-39.079.757.8-0.7-171.577.4-122.7-4.9-15.00.86.027.9-18.2-4.1-28.06.736.0-6.31.3-0.8-27.814.7-86.1

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-31
Value0.074915000.020500.00.00.025007500.00.010000.00.03500.010000.0
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.00.0100.00.00.00.0100.0100.00.00.0100.00.00.0100.00.0100.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RevolvingCreditFacility, mgm:MGMChinaCreditFacility


Repayments
Period End2022-03-31
Value0.0
Percentage of RepaymentsOfLongTermDebt0.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.221.2371.2361.2331.233736666686963636567626363630.00.00.00.0
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1.221.2371.2361.2331.2337366666869636567636363
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:Parent


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1.221.2371.2361.2331.2337366666869636567636363
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1.221.2371.2361.2331.2337366666869636567636363
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2201190.00.00.03533923562810.01491765943620.03270.00.00.0
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

mgm:OmnibusIncentivePlan


Share
Period End2020-12-312017-12-31
Value3.09.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value21532106134213042551268026842349229434223233
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2634138982788473349458794911291011
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsNet us-gaap:IncomeTaxAuthority

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2573132172285472548957693811271010890
Percentage of DeferredTaxAssetsNet97.795.187.296.598.999.098.198.899.899.90.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6068105308.3244.72411112.2341011817
Percentage of DeferredTaxAssetsNet2.34.912.83.51.11.01.91.20.2100.00.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value35332418141331106153145134161102
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsValuationAllowance

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2720246924492462251027362498166510328.77936
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1551042851737060566063
Percentage of DeferredTaxAssetsValuationAllowance5.74.21.12.12.92.62.43.45.9720.2

us-gaap:StateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6.03.03.0363.0181516136.0
Percentage of DeferredTaxAssetsValuationAllowance0.20.10.11.50.10.70.61.01.368.3

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:StatementGeographical

country:MO


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1531022649716960
Percentage of DeferredTaxAssetsValuationAllowance5.64.11.12.02.82.52.4

Litigation Reserve Current

us-gaap:LitigationReserveCurrent

us-gaap:LitigationReserveCurrent


Litigation
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value8008007357357350.0
Percentage of LitigationReserveCurrent100.0100.0100.0100.0100.00.0

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense


Adjusted
Period End2020-09-302019-09-30
Value64894
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense100.0100.0

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Adjusted
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value723354-332.82397851808
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense0.00.00.00.00.00.0

mgm:AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mgm:LasVegasStripResorts


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3961085315-104.447267379441418403
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense0.00.00.023.50.00.00.049.30.00.0

us-gaap:OperatingSegments, mgm:MGMChina


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.5814.77540-96.446-116.288-21.99185183172192
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense0.00.00.0-149.70.00.00.020.60.00.0

us-gaap:OperatingSegments, mgm:RegionalOperations


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value318241158145-112.085151228269260211
Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAmortizationAndRentExpense0.00.00.0226.20.00.00.030.10.00.0

mgm:AdjustmentRelatedToRedeemableNoncontrollingInterests

mgm:AdjustmentRelatedToRedeemableNoncontrollingInterests


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-37.011-9.428-6.5081.777328.073.193-3.0740.992-3.825-6.587-4.155-5.986-4.598-18.28-0.028-0.028-0.028-0.0280.00.00.0
Percentage of AdjustmentRelatedToRedeemableNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

mgm:AnnualRentEscalatingFromYearOneThroughYearTen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:AnnualRentEscalatingFromYearOneThroughYearTen

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Annual
Period End2021-08-04
Value2.0
Percentage of AnnualRentEscalatingFromYearOneThroughYearTen100.0

mgm:AnnualRentEscalatorAfterYearFifteen us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:AnnualRentEscalatorAfterYearFifteen

mgm:AriaAndVdara, mgm:BlackstoneRealEstateIncomeTrust


Annual
Period End2021-06-30
Value2.0
Percentage of AnnualRentEscalatorAfterYearFifteen100.0

mgm:AnnualRentEscalatorAfterYearFifteen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

mgm:MGPBREITVenture, mgm:MandalayBayAndMGMGrandLasVegas


Annual
Period End2021-06-302021-03-312020-12-31
Value02.00
Percentage of AnnualRentEscalatorAfterYearFifteen0.00.00.0

mgm:AnnualRentEscalatorAfterYearTen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:AnnualRentEscalatorAfterYearTen

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Annual
Period End2021-08-04
Value2.0
Percentage of AnnualRentEscalatorAfterYearTen100.0

mgm:AnnualRentEscalatorAfterYearTwenty us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mgm:AnnualRentEscalatorAfterYearTwenty

mgm:BlackstoneRealEstateIncomeTrust, mgm:LasVegasStripResorts, mgm:Bellagio


Annual
Period End2021-06-302021-03-31
Value04.0
Percentage of AnnualRentEscalatorAfterYearTwenty0.0100.0

mgm:AnnualRentEscalatorCapAfterYearFifteen us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:AnnualRentEscalatorCapAfterYearFifteen

mgm:AriaAndVdara, mgm:BlackstoneRealEstateIncomeTrust


Annual
Period End2021-06-30
Value3.0
Percentage of AnnualRentEscalatorCapAfterYearFifteen100.0

mgm:AnnualRentEscalatorCapAfterYearFifteen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

mgm:MGPBREITVenture, mgm:MandalayBayAndMGMGrandLasVegas


Annual
Period End2021-06-302021-03-312020-12-31
Value03.00
Percentage of AnnualRentEscalatorCapAfterYearFifteen0.00.00.0

mgm:AnnualRentEscalatorCapAfterYearTen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:AnnualRentEscalatorCapAfterYearTen

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Annual
Period End2021-08-04
Value3.0
Percentage of AnnualRentEscalatorCapAfterYearTen100.0

mgm:AnnualRentEscalatorCapFromYearElevenThroughYearTwenty us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mgm:AnnualRentEscalatorCapFromYearElevenThroughYearTwenty

mgm:BlackstoneRealEstateIncomeTrust, mgm:LasVegasStripResorts, mgm:Bellagio


Annual
Period End2021-06-302021-03-31
Value03.0
Percentage of AnnualRentEscalatorCapFromYearElevenThroughYearTwenty0.0100.0

mgm:AnnualRentEscalatorFromYearElevenThroughYearTwenty us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mgm:AnnualRentEscalatorFromYearElevenThroughYearTwenty

mgm:BlackstoneRealEstateIncomeTrust, mgm:LasVegasStripResorts, mgm:Bellagio


Annual
Period End2021-06-302021-03-31
Value02.0
Percentage of AnnualRentEscalatorFromYearElevenThroughYearTwenty0.0100.0

mgm:AnnualRentEscalatorFromYearOneThroughYearFifteen us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:AnnualRentEscalatorFromYearOneThroughYearFifteen

mgm:AriaAndVdara, mgm:BlackstoneRealEstateIncomeTrust


Annual
Period End2021-06-30
Value2.0
Percentage of AnnualRentEscalatorFromYearOneThroughYearFifteen100.0

mgm:AnnualRentEscalatorFromYearOneThroughYearFifteen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

mgm:MGPBREITVenture, mgm:MandalayBayAndMGMGrandLasVegas


Annual
Period End2021-06-302021-03-312020-12-31
Value02.00
Percentage of AnnualRentEscalatorFromYearOneThroughYearFifteen0.00.00.0

mgm:AnnualRentEscalatorFromYearOneThroughYearTen us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mgm:AnnualRentEscalatorFromYearOneThroughYearTen

mgm:BlackstoneRealEstateIncomeTrust, mgm:LasVegasStripResorts, mgm:Bellagio


Annual
Period End2021-06-302021-03-31
Value02.0
Percentage of AnnualRentEscalatorFromYearOneThroughYearTen0.0100.0

mgm:BusinessCombinationRetainingOwnershipInterest us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:BusinessCombinationRetainingOwnershipInterest

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Business
Period End2021-08-04
Value370
Percentage of BusinessCombinationRetainingOwnershipInterest100.0

mgm:ChangeInAccumulatedOtherComprehensiveIncomeLoss us-gaap:StatementEquityComponents

mgm:ChangeInAccumulatedOtherComprehensiveIncomeLoss

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.385.7133.4410.04.725
Percentage of ChangeInAccumulatedOtherComprehensiveIncomeLoss100.0100.0100.00.0100.0

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value5.811-13.022-1.4010.5380.289
Percentage of ChangeInAccumulatedOtherComprehensiveIncomeLoss1529.2-227.9-40.70.06.1

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value2.091511-0.448-7.114
Percentage of ChangeInAccumulatedOtherComprehensiveIncomeLoss550.0267.8327.90.0-150.6

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value8.2817.989130.09-2.1
Percentage of ChangeInAccumulatedOtherComprehensiveIncomeLoss2179.2139.8387.20.0-44.4

mgm:ChangeInContractAndContractRelatedLiabilities us-gaap:ProductOrService

mgm:ChangeInContractAndContractRelatedLiabilities

mgm:CustomerAdvancesAndOther


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value106252253-64.727-109.61636-143.986-25.205-53.5211045218-47.0271094.51325-37.236
Percentage of ChangeInContractAndContractRelatedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:LoyaltyProgram


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.612-6.7090.9717.1442.9911.6841.4484.541.9455.747.8727.1134.8492.34-0.8483.772-0.6190.435
Percentage of ChangeInContractAndContractRelatedLiabilities3.4-26.74.313.4-4.6-1.54.0-3.2-7.7-10.77.613.626.7-5.0-0.883.6-2.5-1.2

mgm:OutstandingChipLiability


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-25.065-42.631-138.1771237-13.237-13.4915.80214-15.899-226.23-209.008-20.193181280-2.3062963
Percentage of ChangeInContractAndContractRelatedLiabilities-23.5-169.9-616.623.5-57.312.1-36.9-4.0-56.929.7-217.4-398.2-111.3-385.9254.9-51.1116.4-169.4

mgm:ChangesInAccumulatedOtherComprehensiveIncomeLossRedemptionOfOperatingPartnershipUnits us-gaap:StatementEquityComponents

mgm:ChangesInAccumulatedOtherComprehensiveIncomeLossRedemptionOfOperatingPartnershipUnits

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Changes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value05327000.04001000.004772000.0
Percentage of ChangesInAccumulatedOtherComprehensiveIncomeLossRedemptionOfOperatingPartnershipUnits0.0100.0100.00.0100.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Changes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value05327000.04001000.004772000.0
Percentage of ChangesInAccumulatedOtherComprehensiveIncomeLossRedemptionOfOperatingPartnershipUnits0.0100.0100.00.0100.0

mgm:CommissionsComplimentariesAndOtherIncentives

mgm:CommissionsComplimentariesAndOtherIncentives


Commissions
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value299276714542498687601602600594520540600535473485
Percentage of CommissionsComplimentariesAndOtherIncentives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:ComplementaryTaxRate us-gaap:BusinessAcquisition

mgm:ComplementaryTaxRate

mgm:MGMGrandParadiseSA


Complementary
Period End2021-06-302021-03-312020-09-30
Value012.011.88
Percentage of ComplementaryTaxRate0.0100.0100.0

mgm:ComplementaryTaxRate us-gaap:BusinessAcquisition, us-gaap:IncomeTaxAuthority

mgm:MGMGrandParadiseSA, country:MO


Complementary
Period End2020-12-312020-09-302020-03-30
Value011.8812.0
Percentage of ComplementaryTaxRate0.0100.00.0

mgm:ContributionsToUnconsolidatedAffiliates us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:ContributionsToUnconsolidatedAffiliates

mgm:BetMGMLLC


Contributions
Period End2021-06-302021-03-312020-06-302020-03-31
Value257510.020
Percentage of ContributionsToUnconsolidatedAffiliates100.0100.0100.0100.0

mgm:CorporateIncomeExpense

mgm:CorporateIncomeExpense


Corporate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-96.87-78.037-103.325-70.437-142.578-143.808-118.6-108.545-108.061-129.436-118.168-98.089-103.438-99.509-115.788-88.506-79.408-73.173-71.941-87.782-81.803-71.248-90.574-74.019
Percentage of CorporateIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:DebtInstrumentScheduledAmortizationPaymentsBeginningOnLastDayOfEachCalendarQuarterFromSpecifiedPeriodAsPercentageOfOriginalPrincipalBalance us-gaap:LongtermDebtType, us-gaap:StatementScenario

mgm:DebtInstrumentScheduledAmortizationPaymentsBeginningOnLastDayOfEachCalendarQuarterFromSpecifiedPeriodAsPercentageOfOriginalPrincipalBalance

mgm:MGMNationalHarborCreditFacility, us-gaap:ScenarioForecast


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

mgm:DecreaseInForeignTaxCreditCarryForwardValuationAllowance us-gaap:IncomeTaxAuthority

mgm:DecreaseInForeignTaxCreditCarryForwardValuationAllowance

country:MO


Decrease
Period End2021-06-302021-03-31
Value2000000.03000000.0
Percentage of DecreaseInForeignTaxCreditCarryForwardValuationAllowance100.0100.0

mgm:EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss

mgm:CityCenter


Equity
Period End2020-09-302019-12-312019-09-302018-12-312018-09-30
Value-29.25428614526
Percentage of EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss100.0100.0100.0100.0100.0

mgm:FinanceLeaseCost

mgm:FinanceLeaseCost


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value171716114.384166.6372.4852.5832.8
Percentage of FinanceLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:FinanceLeaseInterestExpenseCredit

mgm:FinanceLeaseInterestExpenseCredit


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-396000.0-656000.0-1524000.0-5990000.0-12854000.0-952000.0543000.0208000.0204000.0209000.0
Percentage of FinanceLeaseInterestExpenseCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:FixedAnnualRent us-gaap:TypeOfArrangement

mgm:FixedAnnualRent

mgm:MasterLease


Fixed
Period End2021-05-31
Value27
Percentage of FixedAnnualRent100.0

mgm:GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences

mgm:CityCenterHoldingsLLC, mgm:HarmonLand


Gain
Period End2021-06-30
Value30
Percentage of GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences100.0

mgm:CityCenterHoldingsLLCAsInvestee, mgm:HarmonLand


Gain
Period End2021-06-30
Value35
Percentage of GainLossOnSaleOfBusinessInUnconsolidatedAffiliatesAndReversalOfBasisDifferences116.7

mgm:GainRelatedToSaleOfHarmonLandUnconsolidatedAffiliate

mgm:GainRelatedToSaleOfHarmonLandUnconsolidatedAffiliate


Gain
Period End2021-06-30
Value49
Percentage of GainRelatedToSaleOfHarmonLandUnconsolidatedAffiliate100.0

mgm:IncomeLossFromUnconsolidatedAffiliates

mgm:IncomeLossFromUnconsolidatedAffiliates


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value83-25.579-5.09220-8.35335173627383235473128374039323244814405742117-2.127235.86818163.9286.68216-1.116-37.9435.986-13.309-4.8150.5393263271.403-26.194-80.918
Percentage of IncomeLossFromUnconsolidatedAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:IncomeLossFromUnconsolidatedAffiliates us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:BetMGMLLC


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value-45.979-59.236-5.241-10.677
Percentage of IncomeLossFromUnconsolidatedAffiliates-55.2231.662.7-29.9

mgm:CityCenterHoldingsLLCAsInvestee


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value90-2.831-5.264-6.041-39.1132022393134
Percentage of IncomeLossFromUnconsolidatedAffiliates108.211.1103.4-29.3468.357.8129.6108.6116.789.9

mgm:MGPBREITVenture


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value3838383838190.00.0
Percentage of IncomeLossFromUnconsolidatedAffiliates46.7-152.3-765.3188.9-465.255.80.00.0

mgm:OtherUnconsolidatedAffiliates


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.151-2.474-38.796-12.3-8.101-4.868-5.195-3.103-4.5023.9
Percentage of IncomeLossFromUnconsolidatedAffiliates0.29.7761.9-59.697.0-13.6-29.6-8.6-16.710.1

mgm:IncomeLossFromUnconsolidatedAffiliatesRelatedToRealEstateVentures

mgm:IncomeLossFromUnconsolidatedAffiliatesRelatedToRealEstateVentures


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-30
Value4141414141230.0
Percentage of IncomeLossFromUnconsolidatedAffiliatesRelatedToRealEstateVentures100.0100.0100.0100.0100.0100.00.0

mgm:IncreaseInForeignTaxCreditCarryForwardValuationAllowance us-gaap:IncomeTaxAuthority

mgm:IncreaseInForeignTaxCreditCarryForwardValuationAllowance

country:MO


Increase
Period End2020-09-302020-06-30
Value1.013
Percentage of IncreaseInForeignTaxCreditCarryForwardValuationAllowance100.0100.0

mgm:IssuanceOfOperatingPartnershipUnits dei:LegalEntity, us-gaap:CapitalUnitsByClass

mgm:IssuanceOfOperatingPartnershipUnits

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, us-gaap:CapitalUnitClassA


Issuance
Period End2021-06-302020-02-142020-02-132019-11-222019-12-312019-09-302019-06-302019-01-312017-09-112017-09-30
Value3.05.013180.03.02.0191313
Percentage of IssuanceOfOperatingPartnershipUnits100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl dei:LegalEntity, us-gaap:StatementEquityComponents

mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl

mgm:MGPBREITVenture, mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.00.059
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.0100.0

mgm:MGPBREITVenture, us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.00.059
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.0100.0

mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:MGPBREITVenture


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.01.725
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.02923.7

mgm:NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

mgm:MGPBREITVenture, us-gaap:AccumulatedOtherComprehensiveIncome


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0-0.059
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.0-100.0

mgm:MGPBREITVenture, us-gaap:AdditionalPaidInCapital


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0-6.503
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.0-11022.0

mgm:MGPBREITVenture, us-gaap:NoncontrollingInterest


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.08.287
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.014045.8

mgm:MGPBREITVenture, us-gaap:Parent


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0-6.562
Percentage of NetEquityImpactDueToTransactionBetweenEntitiesUnderCommonControl0.00.00.0-11122.0

mgm:NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted

mgm:NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted


Net
Period End2021-03-312020-03-31
Value-341.257814
Percentage of NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted100.0100.0

mgm:NonOperatingItemsFromUnconsolidatedAffiliates

mgm:NonOperatingItemsFromUnconsolidatedAffiliates


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2320232323327.9851421181611119.018.4498.825106.9217.911115181622171918221413-73.722-22.673-38.864-22.079-21.417-20.901-20.836-26.866-26.029-24.692-28.00240190-27.185-31.57423
Percentage of NonOperatingItemsFromUnconsolidatedAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:NoncashLeaseExpense

mgm:NoncashLeaseExpense


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value43444343455124161614
Percentage of NoncashLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:OperatingPartnershipRedemptionUnitsForClassAOffering dei:LegalEntity, us-gaap:Ownership

mgm:OperatingPartnershipRedemptionUnitsForClassAOffering

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, mgm:OperatingPartnership


Operating
Period End2021-03-31
Value22
Percentage of OperatingPartnershipRedemptionUnitsForClassAOffering100.0

mgm:OperatingPartnershipUnitsReceived us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:OperatingPartnershipUnitsReceived

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Operating
Period End2021-08-04
Value1.366
Percentage of OperatingPartnershipUnitsReceived100.0

mgm:OtherComprehensiveIncomeLossOtherTransactions us-gaap:StatementEquityComponents

mgm:OtherComprehensiveIncomeLossOtherTransactions

mgm:AccumulatedOtherAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-9000.02482000.0560000.0047000.0411000.0-69000.0-72000.023000.0
Percentage of OtherComprehensiveIncomeLossOtherTransactions100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-9000.02482000.0560000.0047000.0411000.0-69000.0-72000.023000.0
Percentage of OtherComprehensiveIncomeLossOtherTransactions100.0100.0100.00.0100.0100.0100.0100.0100.0

mgm:PartnersCapitalAccountRedemptionsPerUnit

mgm:PartnersCapitalAccountRedemptionsPerUnit


Partners
Period End2020-12-022020-05-18
Value29.7823.1
Percentage of PartnersCapitalAccountRedemptionsPerUnit100.0100.0

mgm:PartnersCapitalAccountUnitsRedeemedForCash dei:LegalEntity, us-gaap:Ownership

mgm:PartnersCapitalAccountUnitsRedeemedForCash

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, mgm:OperatingPartnership


Partners
Period End2021-03-31
Value15
Percentage of PartnersCapitalAccountUnitsRedeemedForCash100.0

mgm:PercentageOfDividendOnEquityMethodInvestmentsFromUnconsolidatedAffiliates dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:PercentageOfDividendOnEquityMethodInvestmentsFromUnconsolidatedAffiliates

mgm:CityCenterHoldingsLLCAsInvestee, mgm:HarmonLand


Percentage
Period End2021-06-30
Value50.0
Percentage of PercentageOfDividendOnEquityMethodInvestmentsFromUnconsolidatedAffiliates100.0

mgm:PercentageOfExpectedLeaseTermOfEconomicUsefulLife us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

mgm:PercentageOfExpectedLeaseTermOfEconomicUsefulLife

mgm:MGPBREITVenture, mgm:MandalayBayAndMGMGrandLasVegas


Percentage
Period End2020-12-31
Value0
Percentage of PercentageOfExpectedLeaseTermOfEconomicUsefulLife0.0

mgm:PercentageOfPresentValueOfFutureMinimumLeasePayments us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

mgm:PercentageOfPresentValueOfFutureMinimumLeasePayments

mgm:MGPBREITVenture, mgm:MandalayBayAndMGMGrandLasVegas


Percentage
Period End2020-12-31
Value0
Percentage of PercentageOfPresentValueOfFutureMinimumLeasePayments0.0

mgm:PercentageOfPrincipalAmountOutstandingGuaranteed us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:PercentageOfPrincipalAmountOutstandingGuaranteed

mgm:MGPBREITVenture


Percentage
Period End2021-06-302021-03-312020-12-31
Value010.00
Percentage of PercentageOfPrincipalAmountOutstandingGuaranteed0.0100.00.0

mgm:PreopeningAndStartUpIncomeExpense

mgm:PreopeningAndStartUpIncomeExpense


Preopening
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-90000.0-5000.0-33000.0-11000.082000.0-122000.0-2084000.0-925000.0-879000.0
Percentage of PreopeningAndStartUpIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts

mgm:ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.08852455086645480.00.0
Percentage of ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts0.00.0100.0100.0100.0100.0100.0100.00.00.0

mgm:ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts dei:LegalEntity

mgm:MGMGrowthPropertiesLimitedLiabilityCompany


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-31
Value1166760.088524
Percentage of ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts0.00.0100.0100.0

mgm:ProceedsFromRelatedPartyTransactions

mgm:ProceedsFromRelatedPartyTransactions


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.024550.00.0
Percentage of ProceedsFromRelatedPartyTransactions0.00.00.0100.00.00.0

mgm:PropertyTransactionsNet

mgm:PropertyTransactionsNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-28.906268.1274.1162654112495.798.77628-42.4165.898277.711131.69612-1.2680.8545.13114917.1233.9531.5890.486.794330.5582.01226888.4916105.803900.91795810.90.091-2.17832611260.689
Percentage of PropertyTransactionsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:StockIssuedDuringPeriodValueRestrictedStockUnits

mgm:StockIssuedDuringPeriodValueRestrictedStockUnits


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0002142000.00001546000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnits0.00.00.0100.00.00.00.0100.0

mgm:StockIssuedDuringPeriodValueRestrictedStockUnits us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0002142000.00001546000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnits0.00.00.0100.00.00.00.0100.0

us-gaap:Parent


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0002142000.00001546000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnits0.00.00.0100.00.00.00.0100.0

mgm:TransitionExpense us-gaap:TitleOfIndividual

mgm:TransitionExpense

srt:ChiefExecutiveOfficer


Transition
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.0440.00.0
Percentage of TransitionExpense0.00.00.0100.00.00.0

mgm:TripleNetOperatingLeaseAndGroundLeaseRentExpense

mgm:TripleNetOperatingLeaseAndGroundLeaseRentExpense


Triple
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value189189189189189141508.0248.3927.893
Percentage of TripleNetOperatingLeaseAndGroundLeaseRentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-30
Value-1566000.0-6772000.0-1163000.0-522000.0-891000.0-804000.0304000.0-458000.0-3187000.01121000.0-1270000.0-1034000.0-1614000.0-1582000.0380000.0-45000.007482000.0-761000.0-39000.0-504000.0-2143000.0-849000.0-62000.0-535000.0-1000.0054000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value9000.0-2482000.0-560000.00-47000.0-411000.0317000.069000.072000.023000.0000000
Percentage of AdjustmentsToAdditionalPaidInCapitalOther-0.636.748.2-0.05.351.1104.3-15.1-2.32.1-0.0-0.0-0.0-0.00.0-0.0

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312011-12-312011-09-30
Value-944000.0-2227000.0-96000.00-1507000.0-121000.0-1311000.0406000.0-4583000.02015000.04339000.0-818000.0-904000.0-847000.0-2248000.0-34000.0054000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther60.332.98.3-0.0169.115.0-431.2-88.6143.8179.8-341.779.156.053.5-591.675.60.0100.0

us-gaap:NoncontrollingInterest


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-631000.0-2063000.0-507000.0-522000.0663000.0-272000.01298000.0-933000.01324000.0-917000.0-5609000.0-216000.0-710000.0-735000.02628000.0-11000.00-23000.0-373000.0-19000.0-247000.0-1050000.0-416000.0-30000.0-262000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther40.330.543.6100.0-74.433.8427.0203.7-41.5-81.8441.720.944.046.5691.624.40.0-0.349.048.749.049.049.048.449.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-30
Value-935000.0-4709000.0-656000.00-1554000.0-532000.0-994000.0475000.0-4511000.02038000.04339000.0-818000.0-904000.0-847000.0-2248000.0-34000.007505000.0-388000.0-20000.0-257000.0-1093000.0-433000.0-32000.0-273000.0-1000.0054000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther59.769.556.4-0.0174.466.2-327.0-103.7141.5181.8-341.779.156.053.5-591.675.60.0100.351.051.351.051.051.051.651.0100.00.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value109.7349.4459.0157.9687.9359.4339.804109.3731010109.6347.0658.2148.8738.8448.8329.2759.9411211159.7329.7829.5439.3799.3269.4029.2549.1518.518.366171616222323232323242415
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits

us-gaap:AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits


Amount
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-25000.0-20000.00-83000.0-30000.0-35000.0-52000.0-27000.0-43000.0-26000.0-165000.0-93000.0-42000.0-62000.0-56000.001000.0-8000.0639000.0-86000.0-84000.0-132000.0129000.0-31000.0
Percentage of AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:BusinessCombinationConsiderationTransferred1

mgm:AriaAndVdara, mgm:BlackstoneRealEstateIncomeTrust


Business
Period End2021-06-30
Value3890
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Business
Period End2021-08-04
Value4400
Percentage of BusinessCombinationConsiderationTransferred10.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:OtherOwnershipInterestsByName

mgm:CityCenterHoldingsLLCAsInvestee, mgm:InfinityWorldDevelopmentCorp


Business
Period End2021-06-30
Value2125
Percentage of BusinessCombinationConsiderationTransferred154.6

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 us-gaap:StatementScenario, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

srt:ScenarioForecast, mgm:EmpireCity


Business
Period End2024-12-31
Value50
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00250.00250.00250.00250.00250.150.130.130.130.130.120.120.120.120.110.110.110.110000
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value283290298294299318331322334316312300296268249249244249233209206199200204208206202202203207207211218211226228235236237249177152146158164163
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1017000.0-1102000.0-136000.016000.0149000.02316000.02763000.0-1502000.02520000.0-1180000.0-496000.01201000.0140000.0-2830000.0-419000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3316242424130.2990.00.00.00.01.9135.14.552.63.352.854.252.8893.3033.8026.911183.3863.7754.0394.4673.8413.5573.7034.144.7133.6784.3976.0744.7885.2165.1996.3656.2221038648.0018.011
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGain us-gaap:IncomeStatementLocation

us-gaap:EquitySecuritiesFvNiUnrealizedGain

us-gaap:OtherNonoperatingIncomeExpense


Equity
Period End2021-06-30
Value86
Percentage of EquitySecuritiesFvNiUnrealizedGain100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1120000.01456000.01215000.0876000.0-857000.01722000.0543000.0209000.0203000.0209000.0
Percentage of FinanceLeaseInterestPaymentOnLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15191410-1.581114.7782.3251.7221.486
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1717171717176.0942.2772.3792.591
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate


Gains
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.014910.00.0
Percentage of GainsLossesOnSalesOfInvestmentRealEstate0.00.00.0100.00.00.0

us-gaap:ImpairmentOfInvestments

us-gaap:ImpairmentOfInvestments


Impairment
Period End2020-12-312020-09-302020-06-30
Value0.00.026
Percentage of ImpairmentOfInvestments0.00.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value60-46.415-28.41-2.969-32.1143.1279.569215.5272016233619192830322421431-5.79222332497-21.680.176-8.8115.034-57.747-18.745-32.182-6.111-23.065-58.968-14.85-40.175-30.844-24.1534.025230.653-25.782-57.768-107.762
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value211-23.763-932.602190-63.434-577.936-13.67598-21.936-97.269-29.042-65.512.34311341610538-141.05818416021-93.704-31.06748-78.863-77.428-119.235-91.2069.42-87.934-73.52491164-66.476-93.127170-44.3261301066-31.208-12.7615742-5.024-83.667
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value151.238-73.037-3.87-122.048-17.295-3.296-2.881-2.4619.897-8.8773.569180.9-48.56513-84.716611-2.522-2.1846.779-7.402-2.382-3.0416.879-17.066-30.424125.73614-6.0672.6022.8181.1430.113-61.89154
Percentage of IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-15.42327-44.85821-16.61940-30.67244-62.13240-31.15552-32.12726-3.27943-34.38340-35.81114-38.77640-14.8918-27.34837-15.044-9.705-27.13129-31.058394.77425-17.74927-39.24934-8.28414-32.88411-13.17525-29.04214
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312011-06-30
Value5843000.001569000.028000.003052000.03287000.0-820000.05266000.05906000.07138000.0-137000.07149000.07125000.05762000.053000.05687000.05303000.04399000.0-5920000.06033000.05890000.05836000.0-6482000.036000.06436000.06453000.03014000.01891000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseAndRentalExpense us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:LeaseAndRentalExpense

mgm:AriaAndVdara, mgm:BlackstoneRealEstateIncomeTrust


Lease
Period End2021-06-30
Value215
Percentage of LeaseAndRentalExpense100.0

us-gaap:LeaseAndRentalExpense us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mgm:BlackstoneRealEstateIncomeTrust, mgm:LasVegasStripResorts, mgm:Bellagio


Lease
Period End2020-12-01
Value250
Percentage of LeaseAndRentalExpense0.0

us-gaap:LeaseAndRentalExpense us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:Subsegments

mgm:MGPBREITVenture, mgm:MandalayBayAndMGMGrandLasVegas


Lease
Period End2021-03-01
Value298
Percentage of LeaseAndRentalExpense0.0

us-gaap:LeaseAndRentalExpense us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Lease
Period End2021-08-04
Value860
Percentage of LeaseAndRentalExpense0.0

us-gaap:LeaseAndRentalExpense us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:SubsequentEvent, mgm:MasterLease


Lease
Period End2021-04-01
Value843
Percentage of LeaseAndRentalExpense0.0

us-gaap:LeaseAndRentalExpense us-gaap:TypeOfArrangement

mgm:MasterLease


Lease
Period End2021-05-312021-04-012020-04-012020-03-312020-02-142019-04-012019-01-31
Value30843828813813946770
Percentage of LeaseAndRentalExpense0.00.00.00.00.00.00.0

us-gaap:LoansAssumed1

us-gaap:LoansAssumed1


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.013040.00.0
Percentage of LoansAssumed10.00.00.0100.00.00.0

us-gaap:LossContingencyDamagesAwardedValue

us-gaap:LossContingencyDamagesAwardedValue


Loss
Period End2020-12-31
Value0.0
Percentage of LossContingencyDamagesAwardedValue0.0

us-gaap:MinorityInterestDecreaseFromRedemptions

us-gaap:MinorityInterestDecreaseFromRedemptions


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value379.4286.509-3.009-30.95-8.07-3.1933.074-0.9923.8254.1555.9864.598
Percentage of MinorityInterestDecreaseFromRedemptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestDecreaseFromRedemptions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value379.4286.509-3.009-30.95-8.07-3.1933.074-0.9923.8254.1555.9864.598
Percentage of MinorityInterestDecreaseFromRedemptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value379.4286.509-3.009-30.95-8.07-3.1933.074-0.9923.8254.1555.9864.598
Percentage of MinorityInterestDecreaseFromRedemptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value87-338.083-458.032-604.154-936.5967220633.7877363169138264173239250
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-16.953-6.254-10.427-69.423-79.333-134.21852403032261440252944
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest-19.31.82.311.58.5-20.02.51080.541.351.015.610.415.414.612.317.6

us-gaap:Parent


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value104-331.829-447.605-534.731-857.2578062011-37.1334331142123223148209206
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest119.398.297.788.591.5120.097.5-980.558.749.084.489.684.685.487.782.4

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value104-331.829-447.605-534.731-857.2578062011-37.1334331142123223148209206
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest119.398.297.788.591.5120.097.5-980.558.749.084.489.684.685.487.782.4

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1


Noncash
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.08020.00.0
Percentage of NoncashOrPartNoncashAcquisitionInvestmentsAcquired10.00.0100.00.00.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value19819819919920015267262624
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost us-gaap:Subsegments

mgm:MandalayBayAndMGMGrandLasVegas


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value999999999951
Percentage of OperatingLeaseCost49.849.849.749.749.533.4

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15415415014815012250321617
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue us-gaap:IncomeStatementLocation

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

mgm:EntertainmentRetailAndOtherRevenue


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value201613141419222222222222222120201919
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:FoodAndBeverageRevenue


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value114.03.07.05.010.0141413121214121311141412
Percentage of OperatingLeasesIncomeStatementLeaseRevenue55.025.023.150.035.752.663.663.659.154.554.563.654.561.955.070.073.763.2

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.811-13.022-1.4010.5380.28928-18.60226-12.405-2.48121.4-24.152-1.875-3.004-25.376-12.933
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-4.674109.615-6.852-15.062-84.549-15.223-24.531-11.476-18.3824.731
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-80.4-82.0-686.3-1273.6-5211.8-298.481.8-93.092.5741.238.7

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.137-2.3428.214-6.314-14.773-56.213-33.8251.849-23.881-20.862166.746-11.141
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax19.618.0-586.3-1173.6-5111.8-198.4181.87.0192.5841.2138.7481.946.1

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.091511-0.448-7.114-83.08626-16.504-26.298-13.323-19.6434.0285.33513101.316-3.323-0.6341.8790.00.00.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.4327.0995.894-0.764-4.103-45.55515-10.271-16.651-8.6062.7653.669.4980.834-2.347-0.484
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax20.746.452.2170.557.754.858.462.263.364.668.668.668.563.470.676.3

us-gaap:NoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.6588.1995.3890.316-3.011-37.53111-6.233-9.647-4.7171.2631.6754.3583.4050.482-0.976-0.15
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax79.353.647.8-70.542.345.241.637.836.735.431.431.431.532.036.629.423.7

us-gaap:Parent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.4327.0995.894-0.764-4.103-45.55515-10.271-16.651-8.6062.7653.669.4987.2310.834-2.347-0.484
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax20.746.452.2170.557.754.858.462.263.364.668.668.668.568.063.470.676.3

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2.5785.6690.759-0.114-0.167-12.529-8.093115.4991.137-5.504-0.8171037-35.247115.581
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.658-8.199-5.389-0.3163.01137-6.233-9.6474.7176.196-1.263
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest64.3-144.6-710.0277.2-1803.0-299.677.0-83.085.8544.922.9

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-4.236-2.53-4.63-0.432.84425-14.3261.979107.333-6.767-2.4926.426
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest164.3-44.6-610.0377.2-1703.0-199.6177.017.0185.8644.9122.9305.059.6

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-7.596-33.745-8.94-15.932-14.909-8.969-7.708-10.86-7.084-10.257-17.9514.673-14.696-6.531-14.737-4.5752.508-4.377-25.96-1.755-0.819-11.23-37.32-0.0995.8875.401-14.83510-0.0825.227-3.51110-5.905-21.19930-2.297-9.469-5.266-7.239124.395-4.339-12.662-4.175
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet us-gaap:ConsolidationItems

us-gaap:OtherOperatingIncomeExpenseNet

mgm:CorporateAndReconcilingItems


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-106.977-136.991-156.074-113.19-159.342-102.237-109.202-73.117-88.246-61.056-66.682-41.129-50.265-66.724-89.85-51.305-37.446-29.352-41.646-57.605
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountRedemptions

us-gaap:PartnersCapitalAccountRedemptions


Partners
Period End2021-06-302021-03-312020-12-022020-12-312020-09-302020-05-182020-06-30
Value0.050700190.07003.205
Percentage of PartnersCapitalAccountRedemptions0.0100.0100.0100.00.0100.0100.0

us-gaap:PartnersCapitalAccountRedemptions dei:LegalEntity, us-gaap:Ownership

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, mgm:OperatingPartnership


Partners
Period End2021-03-312020-12-022020-05-18
Value1200700700
Percentage of PartnersCapitalAccountRedemptions2360.9100.0100.0

us-gaap:PartnersCapitalAccountRedemptions us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.0-5.327-4.0010.0-4.772
Percentage of PartnersCapitalAccountRedemptions0.0-10.5-21.00.0-148.9

us-gaap:AdditionalPaidInCapital


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.0-171.332-71.8040.0-12.055
Percentage of PartnersCapitalAccountRedemptions0.0-337.1-376.20.0-376.1

us-gaap:NoncontrollingInterest


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.0227940.020
Percentage of PartnersCapitalAccountRedemptions0.0447.6497.20.0625.0

us-gaap:Parent


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.0-176.659-75.8050.0-16.827
Percentage of PartnersCapitalAccountRedemptions0.0-347.6-397.20.0-525.0

us-gaap:PartnersCapitalAccountUnitsRedeemed

us-gaap:PartnersCapitalAccountUnitsRedeemed


Partners
Period End2020-12-022020-05-18
Value2430
Percentage of PartnersCapitalAccountUnitsRedeemed100.0100.0

us-gaap:PartnersCapitalAccountUnitsRedeemed dei:LegalEntity, us-gaap:Ownership

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, mgm:OperatingPartnership


Partners
Period End2021-03-312020-12-022020-05-18
Value372430
Percentage of PartnersCapitalAccountUnitsRedeemed0.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.0-0.342-0.4880.0-0.3850.00.00.942-0.34130-5.0016.64.13411-20.0746.0989.1346.5543.4393.0612.372.8264.0871.795-3.9242.07-2.832-5.614-1.309-1.226210.226-1.9190.1130.4870.1740.420.3910.39-0.5250.4040.3740.43716-15.1020.292
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312010-12-312010-09-30
Value2.1349.212201.822309.3390.0173510110.031604.5440.2174.3570.4984.9051.131590320.00.5316.5150.0105142.509378.30.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value7976666581725169554635485447304965242445302.2672.66540612020.98771672470.0594.3572540.02.7326.226197
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:TypeOfArrangement

us-gaap:PaymentsToAcquireBusinessesGross

mgm:MasterLease


Payments
Period End2021-05-31
Value400
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireEquityMethodInvestments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2576253217200.6060.602719.558530.00.02.503101.1481.2733.52.0780.00.01.5551.5381716160321621325.19.4538.06.417121212215.0267614510640262
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-05-312018-06-302018-03-312017-12-312017-09-302017-06-302017-04-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.3820.327620.4261.0399.66158312.3441202002000.01.2110.03000.30.0-0.939-0.4015411.629-1.2380.7142011.111-0.8670.2090.2930.4970.1030.376-0.7380.2841.801
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:CityCenterHoldingsLLCAsInvestee, mgm:HarmonLand


Proceeds
Period End2021-06-30
Value15
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital0.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:MGPBREITVenture


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value321523232312
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital0.00.06020.97033.636.62816.9

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-19.614-32.104-24.338-10.105-1.914-17.582-23.213-5.471-5.86-7.324-21.908-5.246-5.733-12.497-29.828-12.844-12.009-4.084-20.899-1.761-1.85-5.568-11.453-0.764-0.134-0.152-1.926-1.284-0.525-1.648-4.311-1.524-0.824-0.863-4.192-0.368-0.457-0.908-1.975-3.186-0.704-0.66-0.979-0.43-1.029-0.177
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.013040.00.0
Percentage of ProceedsFromRepaymentsOfLinesOfCredit0.00.00.0100.00.00.0

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-677.502125-523.90970-2430.9341289-1923.042268-1690.189-289.7674641138-740.909380-603.733413971071922015-1959.6862431694328272-1318.6261712-2.625-2.625-1735.125-87.0732676-2690.01985-463.826450-192.1133839-1493.7782151016210-1837.63-1275.177
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value8.8650.5055.7030.2410.0170.1750.6421.3630.2320.341250.1350.2150.2250.3470.0780.1130.180.6541.6311.4320.2277.6890.0840.0950.1647.1140.1250.2770.135170.2230.0880.2350.190.140.0760.020.20.112706.575
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.5972.127-4.8061439218.814138.958.3787.111158.1839.1416.8393.403-2.506127.8793.786-5.8115.0097.72111717148.26149.834-1.960.2333.0921310151219196.7574.1338.4067.113.587171.306
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-6764000.0-4618000.0-4215000.0-6404000.0-7948000.0-1463000.01281000.01767000.01847000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-6764000.0-4618000.0-4215000.0-6404000.0-7948000.0-1463000.01281000.01767000.01847000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-31
Value0.00.0180.07384620040.0529098500.00.00.02.2650.05020.00.00.075914962.6610.08750.00.00.0508
Percentage of RepaymentsOfSeniorDebt0.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0100.00.00.00.0100.0100.0100.00.0100.00.00.00.0100.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.1430.0190.05.562.49142410.00.00.00.0
Percentage of RestructuringCharges100.00.0100.00.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.6398.3570.0167800.0353.8540.326
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.643-1.4980.368412137684.458391.899
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SaleOfStockPercentageOfOwnershipAfterTransaction us-gaap:Ownership

us-gaap:SaleOfStockPercentageOfOwnershipAfterTransaction

mgm:MGMChinaHoldingsLimited


Sale
Period End2021-06-302021-03-31
Value056.0
Percentage of SaleOfStockPercentageOfOwnershipAfterTransaction0.0100.0

us-gaap:StockIssuedDuringPeriodSharesIssuedForServices us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

us-gaap:StockIssuedDuringPeriodSharesIssuedForServices

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Stock
Period End2021-08-04
Value1.366
Percentage of StockIssuedDuringPeriodSharesIssuedForServices100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues dei:LegalEntity, us-gaap:CapitalUnitsByClass

us-gaap:StockIssuedDuringPeriodSharesNewIssues

mgm:MGMGrowthPropertiesLimitedLiabilityCompany, us-gaap:CapitalUnitClassA


Stock
Period End2021-06-302021-03-152020-02-142020-02-132019-11-222019-12-312019-09-302019-06-302019-01-312017-09-112017-09-30
Value3.0225.013300.03.02.0191313
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value238000.0706000.01011000.026000.0126000.0868000.01483000.0180000.0182000.0305000.0173000.0102000.0493000.0485000.0543000.0342000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value-2314000.0-9344000.0-9274000.0-129000.0-574000.0-6426000.0-18570000.0-1980000.0-1140000.0-4275000.0-2202000.0-1095000.0-8295000.0-13428000.0-8653000.0-7625000.0-4074000.0-20864000.0-1761000.0-4970000.0-2448000.0-23306000.0-1079000.0-199000.0-294000.0-3701000.0-1432000.0-882000.0-2869000.0-4783000.0-1651000.0-1500000.0-760000.0-1209000.0-54000.0-644000.0-79000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312011-12-312011-09-30
Value-2316000.0-9351000.0-9284000.0-129000.0-575000.0-6436000.0-18584000.0-1982000.0-1141000.0-4278000.0-2203000.0-1096000.0-8300000.0-8658000.0-7630000.0-4078000.0-646000.0-79000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.1100.1100.1100.0100.2100.2100.1100.1100.1100.1100.0100.1100.1100.1100.1100.1100.3100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312011-12-312011-09-30
Value2000.07000.010000.001000.010000.014000.02000.01000.03000.01000.01000.05000.05000.05000.04000.02000.00
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-0.1-0.1-0.1-0.0-0.2-0.2-0.1-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.3-0.0

us-gaap:Parent


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-2314000.0-9344000.0-9274000.0-129000.0-574000.0-6426000.0-18570000.0-1980000.0-1140000.0-4275000.0-2202000.0-1095000.0-8295000.0-13428000.0-8653000.0-7625000.0-4074000.0-20864000.0-1761000.0-4970000.0-2448000.0-23306000.0-1079000.0-199000.0-294000.0-3701000.0-1432000.0-882000.0-2869000.0-4783000.0-1651000.0-1500000.0-760000.0-1209000.0-54000.0-117000.0-550000.0-644000.0-79000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

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

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

mgm:ShareRepurchaseProgram, us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.03.00.00.00.0111213110.06.06.01910.00.010.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0

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

mgm:ShareRepurchaseProgram, us-gaap:CommonStock, us-gaap:SubsequentEvent


Stock
Period End2021-08-032021-05-032020-01-012019-08-07
Value7.01.0116.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares0.00.00.00.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-09-30
Value5.5823.150.00.00.0101212116.1031910.010.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares93.0105.00.00.00.098.7102.196.9100.0101.7100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-09-30
Value2201190.00.00.0353392356281176594362327
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents

mgm:ShareRepurchaseProgram, us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2201190.00.00.03543613572822001765953620.0328
Percentage of StockRepurchasedAndRetiredDuringPeriodValue99.899.80.00.00.0100.191.9100.0100.10.0100.0100.099.90.0100.2

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:ShareRepurchaseProgram, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType

mgm:ShareRepurchaseProgram, us-gaap:CommonStock, us-gaap:SubsequentEvent


Stock
Period End2021-08-032021-05-032020-01-012019-08-07
Value27556354173
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.00.00.00.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-09-30
Value2201190.00.00.0353392356281176594362327
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-09-30
Value0.0560.0310.00.00.00.1090.1220.1260.110.0610.190.10.1
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-09-30
Value2201190.00.00.0353392356281176594362327
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities us-gaap:ConsolidatedEntities

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

mgm:MarinaDistrictDevelopmentCompany


Unrecognized
Period End2021-06-302021-03-31
Value2010.0
Percentage of UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities100.0100.0

us-gaap:VariableInterestEntityOwnershipPercentage us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:VariableInterestEntityOwnershipPercentage

mgm:SubsidiaryOfBlackstoneRealEstateIncomeTrust, mgm:BellagioBREITVenture


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value095.0094.0500.95
Percentage of VariableInterestEntityOwnershipPercentage0.0100.00.0100.00.0100.0

mgm:AdvanceDepositsAndTicketSales

mgm:AdvanceDepositsAndTicketSales


Advance
Period End2020-12-312019-12-312018-12-312017-12-31
Value123190221149
Percentage of AdvanceDepositsAndTicketSales100.0100.0100.0100.0

mgm:AssetsNoncurrentNetOtherThanPropertyPlantAndEquipment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:AssetsNoncurrentNetOtherThanPropertyPlantAndEquipment

mgm:CityCenterAndMGPBREITVenture


Assets
Period End2020-12-312019-12-31
Value256204
Percentage of AssetsNoncurrentNetOtherThanPropertyPlantAndEquipment100.0100.0

mgm:AssetsNoncurrentOtherThanPropertyPlantAndEquipment

mgm:AssetsNoncurrentOtherThanPropertyPlantAndEquipment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value15857157921591216026161231634811582768477197743695470327030719371497172716075107518754272527402743490839091927992339309
Percentage of AssetsNoncurrentOtherThanPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:CasinoFrontMoneyCurrent

mgm:CasinoFrontMoneyCurrent


Casino
Period End2020-12-312019-12-312018-12-312017-12-31
Value133176342303
Percentage of CasinoFrontMoneyCurrent100.0100.0100.0100.0

mgm:DeferredTaxAssetsLeaseLiabilities us-gaap:IncomeTaxAuthority

mgm:DeferredTaxAssetsLeaseLiabilities

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-31
Value197210200.0
Percentage of DeferredTaxAssetsLeaseLiabilities100.0100.00.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-31
Value1.3681.2130.0
Percentage of DeferredTaxAssetsLeaseLiabilities0.10.10.0

mgm:DeferredTaxAssetsLongTermDebt us-gaap:IncomeTaxAuthority

mgm:DeferredTaxAssetsLongTermDebt

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-31
Value102.0220.0
Percentage of DeferredTaxAssetsLongTermDebt100.0100.00.0

mgm:DeferredTaxAssetsTaxDeferredExpenseReservesAccrualsAndOther us-gaap:IncomeTaxAuthority

mgm:DeferredTaxAssetsTaxDeferredExpenseReservesAccrualsAndOther

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value10697888516842129148
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAccrualsAndOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value7.81413180.03.9451.270.0640.154
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAccrualsAndOther7.313.421.10.02.33.00.00.1

mgm:DeferredTaxLiabilitiesRightOfUseAssets us-gaap:IncomeTaxAuthority

mgm:DeferredTaxLiabilitiesRightOfUseAssets

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-31
Value18609770.0
Percentage of DeferredTaxLiabilitiesRightOfUseAssets100.0100.00.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-31
Value1.21.940.0
Percentage of DeferredTaxLiabilitiesRightOfUseAssets0.10.20.0

mgm:DisposalGroupIncludingDiscontinuedOperationConsiderationNotesReceivableFairValue us-gaap:BalanceSheetLocation

mgm:DisposalGroupIncludingDiscontinuedOperationConsiderationNotesReceivableFairValue

us-gaap:OtherNoncurrentAssets


Disposal
Period End2020-12-312019-12-31
Value144134
Percentage of DisposalGroupIncludingDiscontinuedOperationConsiderationNotesReceivableFairValue100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCapitalizedInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCapitalizedInterest

mgm:CityCenterHoldingsLLCAsInvestee


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value168177186206215241
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCapitalizedInterest100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCompletionGuarantee us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCompletionGuarantee

mgm:CityCenterHoldingsLLCAsInvestee


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value248261274322337372
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCompletionGuarantee100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityContribution us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityContribution

mgm:CityCenterHoldingsLLCAsInvestee


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value333436404247
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityContribution100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredGain us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredGain

mgm:CityCenterHoldingsLLCAsInvestee


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value208210212219221236
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredGain100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityNetAssetsContributed us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityNetAssetsContributed

mgm:CityCenterHoldingsLLCAsInvestee


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value-504170000.0-509380000.0-514590000.0-532500000.0-537820000.0-573160000.0
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityNetAssetsContributed100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityOtherAdjustments

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityOtherAdjustments


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value494139414174-342.56-382.577-274.113-166.152-70.814
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment

mgm:CityCenterHoldingsLLCAsInvestee


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value-1256.516-1304.317-1352.118-1504.161-1555.509-1800.191
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment100.0100.0100.0100.0100.0100.0

mgm:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:PropertyPlantAndEquipmentByType

mgm:CityCenterHoldingsLLCAsInvestee, us-gaap:Land


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value352352352379
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment-28.0-27.0-26.0-25.2

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsCurrentLiability

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsCurrentLiability


Fair
Period End2021-03-312020-12-312020-09-30
Value5000000.01000000.010000000.0
Percentage of FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsCurrentLiability100.0100.0100.0

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLiability

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLiability


Fair
Period End2021-03-312020-12-312020-09-30
Value2941111
Percentage of FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLiability100.0100.0100.0

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLongTermLiability

mgm:FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLongTermLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value33244010110128
Percentage of FairValueOfInterestRateSwapsDesignatedAsCashFlowHedgesRecordedAsLongTermLiability100.0100.0100.0100.0100.0100.0

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsCurrentLiability

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsCurrentLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-30
Value11243120
Percentage of FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsCurrentLiability100.0100.0100.0100.0

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLiability

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-30
Value38437824
Percentage of FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLiability100.0100.0100.0100.0

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLongTermLiability

mgm:FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLongTermLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2719474.09.03.0
Percentage of FairValueOfInterestRateSwapsNotDesignatedAsCashFlowHedgesRecordedAsLongTermLiability100.0100.0100.0100.0100.0100.0

mgm:FinanceLeaseLiabilityPaymentsDueAfterYearFour

mgm:FinanceLeaseLiabilityPaymentsDueAfterYearFour


Finance
Period End2020-09-30
Value517000.0
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFour100.0

mgm:FixedAnnualRentEscalatorPercentage us-gaap:TypeOfArrangement

mgm:FixedAnnualRentEscalatorPercentage

mgm:BaseRent


Fixed
Period End2020-12-31
Value2.0
Percentage of FixedAnnualRentEscalatorPercentage100.0

mgm:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

mgm:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-302021-03-312020-09-30
Value198021980120445
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0100.0

mgm:LoyaltyProgramObligationsCurrent

mgm:LoyaltyProgramObligationsCurrent


Loyalty
Period End2020-12-312019-12-312018-12-312017-12-31
Value13912611391
Percentage of LoyaltyProgramObligationsCurrent100.0100.0100.0100.0

mgm:MinorityInterestOwnershipPercentageInConsolidatedSubsidiary

mgm:MinorityInterestOwnershipPercentageInConsolidatedSubsidiary


Minority
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value43.30.4330.3940.3230.3170.3020.2670.2670.2670.266
Percentage of MinorityInterestOwnershipPercentageInConsolidatedSubsidiary100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mgm:MinorityInterestOwnershipPercentageInConsolidatedSubsidiary dei:LegalEntity

mgm:MGMGrowthPropertiesLimitedLiabilityCompany


Minority
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-08-312017-03-312016-12-31
Value58.457.947.00.3630.3230.3170.3020.2670.2670.2670.2660.2660.2770.2370.2370
Percentage of MinorityInterestOwnershipPercentageInConsolidatedSubsidiary0.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

mgm:MinorityInterestOwnershipPercentageInConsolidatedSubsidiary us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:MGPBREITVenture


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-02-14
Value49.949.949.949.90.4990.499
Percentage of MinorityInterestOwnershipPercentageInConsolidatedSubsidiary0.00.00.0115.2115.20.0

mgm:OutstandingChipLiabilitiesCurrent

mgm:OutstandingChipLiabilitiesCurrent


Outstanding
Period End2020-12-312019-12-312018-12-312017-12-31
Value212314323597
Percentage of OutstandingChipLiabilitiesCurrent100.0100.0100.0100.0

mgm:PercentInterestInALessThanHundredPercentOwnedConsolidatedAffiliate us-gaap:RelatedPartyTransactionsByRelatedParty

mgm:PercentInterestInALessThanHundredPercentOwnedConsolidatedAffiliate

mgm:MGPBREITVenture


Percent
Period End2021-06-302021-03-312020-12-312020-09-302020-02-14
Value050.1049.5990.501
Percentage of PercentInterestInALessThanHundredPercentOwnedConsolidatedAffiliate0.0100.00.0100.0100.0

mgm:TaxCreditCarryforwardExpirationAmount us-gaap:TaxPeriod

mgm:TaxCreditCarryforwardExpirationAmount

mgm:TaxYear2022


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value340319640752
Percentage of TaxCreditCarryforwardExpirationAmount100.0100.0100.0100.0

mgm:TaxYear2024


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value769773782787
Percentage of TaxCreditCarryforwardExpirationAmount226.2242.3122.2104.7

mgm:TaxYear2025


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value674333332331
Percentage of TaxCreditCarryforwardExpirationAmount198.2104.451.944.0

mgm:TaxYear2026


Tax
Period End2020-12-31
Value134
Percentage of TaxCreditCarryforwardExpirationAmount39.4

mgm:TaxYear2027


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value200199196199
Percentage of TaxCreditCarryforwardExpirationAmount58.862.430.626.5

mgm:UnpaidWagersAndOtherCurrent

mgm:UnpaidWagersAndOtherCurrent


Unpaid
Period End2020-12-312019-12-312018-12-312017-12-31
Value12611310385
Percentage of UnpaidWagersAndOtherCurrent100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302010-12-31
Value443707747633640570562569541592573415
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent us-gaap:ProductOrService

mgm:HotelServices


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value46164154146169157149156
Percentage of AccountsReceivableGrossCurrent10.423.220.723.226.427.626.527.4

mgm:OtherReceivables


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1351491741421391271061049979
Percentage of AccountsReceivableGrossCurrent30.621.123.322.521.722.418.918.318.413.5

us-gaap:Casino


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value260394419343
Percentage of AccountsReceivableGrossCurrent58.955.756.054.3

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


Accrual
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value10921823517016615320123622318317117563
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302010-12-31
Value126949092978989819710111093
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent us-gaap:ValuationAllowancesAndReservesType

us-gaap:AllowanceForCreditLoss


Allowance
Period End2020-12-312019-12-312018-12-312017-12-31
Value126949092
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0

us-gaap:BusinessAcquisitionSharePrice us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

us-gaap:BusinessAcquisitionSharePrice

mgm:VICIPropertiesInc, us-gaap:SubsequentEvent


Business
Period End2021-08-04
Value43.0
Percentage of BusinessAcquisitionSharePrice100.0

us-gaap:CashAvailableForDistributions us-gaap:Range, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility

us-gaap:CashAvailableForDistributions

srt:Maximum, us-gaap:RevolvingCreditFacility, mgm:SeniorCreditFacility


Cash
Period End2021-02-282020-04-30
Value1000600
Percentage of CashAvailableForDistributions100.0100.0

us-gaap:CashAvailableForDistributions us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility

srt:ScenarioForecast, us-gaap:RevolvingCreditFacility, mgm:SeniorCreditFacility


Cash
Period End2022-06-30
Value1000
Percentage of CashAvailableForDistributions0.0

us-gaap:ConstructionPayableCurrent

us-gaap:ConstructionPayableCurrent


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value2124302826407414423124931137241843447423825421427030633328525018820312517096
Percentage of ConstructionPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312012-12-31
Value12677133531248011504114341181511271150661479914857152531479013646133861301813622133351324713144129511252313063128241417013598
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility

mgm:MGMChinaCreditFacility


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value7706544838256677757002287243324722085216323012251215020061933176416611559
Percentage of DebtInstrumentCarryingAmount6.25.74.27.05.95.14.715.416.016.715.316.217.716.516.115.114.713.613.312.2

mgm:MGMChinaFirstRevolvingCreditFacility


Debt
Period End2021-06-302021-03-312020-12-31
Value226902770
Percentage of DebtInstrumentCarryingAmount1.86.86.2

mgm:OperatingPartnershipSeniorCreditFacility


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.510.010020013501703225222592349281928382078208320912133
Percentage of DebtInstrumentCarryingAmount0.00.10.91.711.415.114.915.315.818.519.215.215.616.116.2

mgm:SeniorCreditFacility


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value55055014890.0126010601070750228231889372540243296250
Percentage of DebtInstrumentCarryingAmount4.84.812.60.08.47.27.24.91.51.76.62.94.01.82.21.9

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:CreditFacility, us-gaap:LineOfCreditFacility

us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:RevolvingCreditFacility, mgm:SeniorCreditFacility


Debt
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-312017-12-312017-09-302017-03-31
Value2.750.02750.02930.04030.04390.04660.03980.03740.03440.0319
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value102108103909471102122137124121126132103109129137148156164158127
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:DebtWeightedAverageInterestRate

mgm:TermLoan, mgm:MGMChinaCreditFacility


Debt
Period End2020-12-312020-09-30
Value2.983.2
Percentage of DebtWeightedAverageInterestRate100.0100.0

mgm:TermLoan, mgm:MGMChinaFirstRevolvingCreditFacility


Debt
Period End2021-06-302021-03-31
Value2.842.88
Percentage of DebtWeightedAverageInterestRate0.00.0

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible


Decrease
Period End2020-12-31
Value30
Percentage of DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible100.0

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible us-gaap:ConsolidatedEntities

mgm:MarinaDistrictDevelopmentCompany


Decrease
Period End2021-03-31
Value20
Percentage of DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible0.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4787349621702189328431753271329934243422
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities us-gaap:IncomeTaxAuthority

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4476318618231798292728562952297831673153
Percentage of DeferredIncomeTaxLiabilities93.591.184.082.189.190.090.290.392.592.2

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value310309346391356318319321256268
Percentage of DeferredIncomeTaxLiabilities6.58.916.017.910.910.09.89.77.57.8

us-gaap:DeferredTaxAssetsGross us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsGross

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5293379131713316323532263075260421591018926
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value21617213382817471676363
Percentage of DeferredTaxAssetsGross4.14.64.22.52.52.32.32.62.96.2

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value571923469.6692021304601492237
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value18014010776726959555050
Percentage of DeferredTaxAssetsOperatingLossCarryforwards313.7727.9458.5164.7752.8347.5275.218.48.310.3

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:StateAndLocalJurisdiction


Deferred
Period End2020-12-31
Value57
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value17100.9980.00.02.8371011108.898
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0100.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value309526002926304528242883260117968202927
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

country:MO


Deferred
Period End2020-12-31
Value3100
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsForeign100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.3317.9185.955.2326.8814.7194.0743.683.082.89514
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1818202433323431365651
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value7.1636.4875.4094.4233.830.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost39.334.426.318.111.50.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2525232540424737383643
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2.1061.6821.3720.8210.8950.9761.4560.3331.4772.273
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts8.36.75.83.22.22.33.10.93.96.2

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value108112907912499109105103100
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value309307346348352318319321256255
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets284.4273.8381.8439.8282.3320.7293.0305.2248.5255.7

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312013-12-312012-12-312011-12-312010-12-31
Value11584960.0238.3233441
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.00.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

mgm:InternalRevenueServiceIRSStateAndLocalJurisdiction