GPI


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:StatementBusinessSegments

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents
us-gaap:InterestExpense

us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

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

us-gaap:Revenues

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:Restatement

us-gaap:Assets
us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementBusinessSegments

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:StatementBusinessSegments

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:StatementBusinessSegments

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:DebtInstrument
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:LossContingenciesByNatureOfContingency

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

gpi:BorrowingsOnCreditFacilityAcquisitionLine

gpi:BorrowingsOnCreditFacilityFloorplanLine

gpi:DilutiveEffectOfRestrictedStockAndEmployeeStockPurchasesNetOfAssumedRepurchaseOfTreasuryStock

gpi:FloorPlanInterestExpense

gpi:GoodwillAdjustmentsandAcquiredDuringPeriod
us-gaap:StatementBusinessSegments

gpi:IncreaseDecreaseFloorPlanNotes

gpi:IncreaseDecreaseInContractsInTransitAndVehicleReceivables

gpi:IncreaseDecreaseInOperatingLeaseLiability

gpi:IncreaseDecreaseinCapitalExpendituresAccrued
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementBusinessSegments
gpi:NetGainLossOnRealEstateAndDealershipTransactions
us-gaap:StatementBusinessSegments

gpi:NetIssuanceofCommonandTreasurySharestoEmployeeStockCompensationPlans

gpi:OperatingLeaseRightofUseAssetAmortization

gpi:OtherComprehensiveIncomeLossReclassificationOfCashFlowHedgeGainLossAfterReclassificationAndTax

gpi:ProceedsFromDispositionOfFranchisePropertyAndEquipment

gpi:RepaymentsOnCreditFacilityAcquisitionLine

gpi:RepaymentsOnCreditFacilityFloorplanLine

gpi:RightofUseAssetObtainedinExchangeforFinanceLeaseLiabilityModificationsandRemeasurements

gpi:RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityModificationsandRemeasurements

gpi:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AssetImpairmentCharges
us-gaap:StatementBusinessSegments

us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:StatementScenario, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType

us-gaap:CommonStockDividendsPerShareCashPaid
us-gaap:ProductOrService
us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments
us-gaap:DerivativeLossOnDerivative

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossRelatedToLitigationSettlement

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInRetailRelatedInventories

us-gaap:InterestExpenseOther

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:IncomeStatementLocation

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax
us-gaap:IncomeStatementLocation

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:ProceedsFromIssuanceOfOtherLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt
us-gaap:OtherComprehensiveIncomeLocation
us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
us-gaap:OtherComprehensiveIncomeLocation, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfOtherLongTermDebt

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:StatementBusinessSegments
us-gaap:SeveranceCosts1
us-gaap:StatementBusinessSegments
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

gpi:ContractsInTransitAndVehicleReceivablesAllowanceForDoubtfulAccounts

gpi:ContractsInTransitAndVehicleReceivablesGross

gpi:ContractsInTransitAndVehicleReceivablesNet

gpi:ContractsInTransitGross
us-gaap:CreditFacility
gpi:DebtInstrumentRestrictiveCovenantsMaximumDividendsAndShareRepurchasesAmount

gpi:DeferredTaxAssetsInterestRateSwaps

gpi:DeferredTaxAssetsOperatingLeaseLiabilities

gpi:FMCCOffset

gpi:FloorplanNotesPayableCreditFacilityGross

gpi:FloorplanNotesPayableManufacturerAffiliates

gpi:FloorplanOffset
us-gaap:StatementScenario
gpi:ForecastedSeasonallyAdjustedAnnualRateOfNewVehicleSales

gpi:GeneralLiabilityAndWorkersCompensationLiability

gpi:GuarantorObligationsMaximumExposureInestimableMinimumLeasePaymentsGuaranteed
us-gaap:MeasurementInputType, us-gaap:ReportingUnit
gpi:IntangibleAssetMeasurementInput

gpi:LettersOfCreditOutstandingAsBeneficiary

gpi:LettersofCreditOutstandingasBeneficiary

gpi:LongTermDebtAndCapitalLeaseObligationsExcludingShortTermFinancingCurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
gpi:LongTermDebtOffset
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
gpi:LongtermDebtOffset

gpi:ManufacturerFloorplanAssistanceRecognizedAsReductionOfInventoryCost

gpi:NewVehiclesInventoryGross

gpi:OperatingAndFinanceLeaseLiability

gpi:OperatingAndFinanceLeaseRightOfUseAsset
us-gaap:LongtermDebtType
gpi:OtherLongTermDebtAndFinanceLeaseLiability
us-gaap:DebtInstrument
gpi:OtherLongTermDebtMiscellaneous

gpi:OtherLongtermDebtandFinanceLeaseLiability
us-gaap:LongtermDebtType

gpi:PartsAccessoriesandOtherInventoryGross

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

gpi:RentalVehiclesInventoryGross

gpi:UsedVehiclesInventoryGross

gpi:VehicleReceivablesGross

us-gaap:AccountsNotesAndLoansReceivableNetCurrent

us-gaap:AccountsReceivableGrossCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:UnusualOrInfrequentItem
us-gaap:CashAndCashEquivalents
us-gaap:CashEquivalentsAtCarryingValue

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerRefundLiability
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:LongtermDebtType
us-gaap:DebtInstrument
us-gaap:DebtInstrumentRepurchasedFaceAmount

us-gaap:DebtInstrumentUnamortizedDiscount

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
us-gaap:CreditFacility
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedPremium

us-gaap:DebtLongtermAndShorttermCombinedAmount
us-gaap:CreditFacility
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DeferredCompensationLiabilityCurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DerivativeAssets

us-gaap:DerivativeAssetsCurrent

us-gaap:DerivativeAssetsNoncurrent
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageFixedInterestRate
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:FinanceLeaseLiability
us-gaap:LongtermDebtType

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss
us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedFranchiseRights

us-gaap:InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet

us-gaap:InventoryGross

us-gaap:InventoryValuationReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility
us-gaap:LineOfCredit
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:Range, us-gaap:CreditFacility
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherDeferredCostsNet

us-gaap:OtherLongTermDebt
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:PledgedAssetsNotSeparatelyReportedRealEstate

us-gaap:PrepaidExpenseCurrent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Derivative Assets
Current Assets
Other Assets Current
NonCurrent Assets
Deferred Income Tax Assets Net
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Derivative Liabilities
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Cash Paid
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 Common Stock Cash
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

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 ████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▁▂▂▂▂▂▂0.30.30.30.30.30.30.30.30.2550.2550.2550.2550.2550.2550.2550.2550.2560.2560.2570.2570.2570.2570.2570.2570.2580.2580.2570.2580.2580.2580.2570.2590.2590.2590.2580.260.2610.2610.260.2620.262NA0.261NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▄▄17.817.8NA17.817.817.8NA18.017.9317.849NA19.26120.04620.307NA20.22520.52220.698NA20.57821.0722.453NA23.13723.31523.446NA24.43226.24225.428NA26.34224.9824.113NA22.45822.51322.532NA22.77823.18322.736NA22.92623.638NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█17.717.8NA17.817.817.8NA18.017.90817.797NA19.25320.03620.298NA20.22220.51620.692NA20.56821.05722.448NA23.13223.31223.443NA23.42423.29823.339NA23.37323.31522.282NA21.52121.6521.629NA22.0222.53322.582NA22.41923.084NA
us-gaap:EarningsPerShareBasic █▅▅▆▃▃▃▃▃▃▃▃▃▃▅▃▃▃▃▃▃▃▁▃▃▃▂▂▂▃▂▃▃▂▂▃▃▂▂▂▂▂▂▂▂▂10.45.545.4400000000000016.861.641.622.572.042.652.091.621.742.721.75.271.431.841.581.441.652.121.47-1.411.881.911.470.771.070.71.290.891.341.530.950.751.381.251.010.920.981.10.640.450.850.550.33
us-gaap:EarningsPerShareDiluted █▅▅▆▃▃▃▃▃▃▃▃▃▃▅▃▃▃▃▃▃▃▁▃▃▃▂▂▂▃▂▃▃▂▂▃▃▂▂▂▂▂▂▂▂▂10.355.525.436.831.631.612.572.042.642.081.621.742.721.75.271.431.841.581.441.652.121.47-1.411.881.911.470.771.030.621.190.811.191.430.880.71.321.20.970.90.941.060.640.450.830.540.32
  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 gpi:NewVehiclesRetail█▅▆▆▁▃▆▆▅▄▆▅▅▅▆▇▄1855.31543.41595.31580.71062.71342.21681.91652.21565.3751414.4851572.7131539.4981555.571513.591661.3091710.2411448.768NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService gpi:PartsAndService█▆▆▇▁▇▇▇▇▇▆▆▆▅▅▅▄392.1360.6361.1375.6282.0370.6379.2383.5378.167369.174354.744354.501358.129349.515343.51343.193331.631NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService gpi:UsedVehiclesRetail█▄▃▄▁▃▃▄▃▃▃▃▃▃▂▂▂1195.6898.8818.3867.2641.2779.0838.8869.7838.896819.203771.242792.405821.853780.57709.072743.038685.949NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService gpi:UsedVehiclesWholesale▇▅▆▆▁▆▅▆▇▆▆▆▇█▆█▇96.480.286.286.748.786.581.885.395.99692.13886.12286.5792.854104.02991.809104.82799.377NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:StatementBusinessSegments gpi:BrazilSegment▄▃▄▃▁▆█▇▇▇█▇▇▇74.856.168.254.336.692.5119.0110.9112.575103.436118.216103.0108.578110.998NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:StatementBusinessSegments gpi:UnitedKingdomSegment▇▅▄█▁▆▆▆▆▇▅▆▇▇700.7549.6501.80000000000024740.8263.5590.7572.5584.6614.434642.158523.885585.9666.883660.542NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:StatementBusinessSegments gpi:UnitedStatesSegment█▅▅▄▁▂▅▅▄▂▄▃▃▃2924.92404.32420.12244.61831.12007.62419.92422.82278.682062.7822266.7572200.22168.0012088.486NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 _ _█▅▅▆▃▃▃▃▄▃▃▃▄▃▃▃▃▃▃▃▄▃▁▃▄▃▂▃▃▃▃▃▃▂▂▃▃▂▂▂▂▂265.8152.7150.1187.179.069.996.583.397.13786.79874.778.19109.16579.07490.99678.50892.23180.13776.91783.91697.3682.0412.94596.64398.0280.73156.4190.35784.70470.63961.11672.94180.62258.64345.8867.05363.08853.97549.77350.07954.43739.214NANANANA
  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:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest █▆▆▆▃▁▄▃▃▃▃▃▃▄▆▃▃▃▃▃▃▃▁▂▄▂▂▂▃▃▂▃▃▂▃▃▃▃▃▂▃▃191.2129.8122.4133.422.8-29.370.621.035.44437.67121.8432.39236.05553.09113.67839.73443.01440.73441.3332.32537.03227.419-25.5652.79660.0930.675-3.8076.5921.17738.73816.38935.10227.52516.35618.36330.20721.90125.91719.60510.66323.14618.499NANANANA
us-gaap:CostOfGoodsAndServicesSold █▆▆▆▃▅▇▇▆▅▆▆▆▆▆▆▅▅▅▆▅▅▅▆▅▄▅▅▅▄▄▄▄▃▃▃▃▂▂▂▁▁▁▁▁3039.22519.42508.52527.71772.42274.32646.82652.72551.4362376.8732476.7462453.9572505.2992440.2632494.732580.8722267.3032135.3072284.4512416.5082372.332219.2542292.4692402.1872334.9072068.972172.9812251.7392142.491922.7411958.1712010.6851993.8361663.3431658.7041685.3411610.4821404.3211380.0681321.6361229.9341187.5271220.7311232.9161191.857NA
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.0-3.3-10.4NANANA0.0NANANANANANANANANANANANANA0.00.00.00.00.0-22.79-23.614NA0.00.00.0NANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:StatementBusinessSegments gpi:UnitedStatesSegmentNANA27.4-3.310.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit █▅▅▆▃▄▅▅▅▄▄▅▅▄▄▄▄▄▄▄▄▄▄▄▄▃▃▄▄▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁661.3490.7481.8512.0358.8416.5464.6465.6454.253431.503432.066435.101438.163419.763425.675431.42404.892383.522389.181406.668410.119389.101380.133398.382391.573363.884365.959374.709369.148338.122321.321329.462341.274300.489280.253291.231285.344260.424245.861248.753244.211221.775217.021228.839226.652204.521
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▅▅▆▃▃▃▃▃▃▃▃▄▃▃▃▃▃▃▃▃▃▁▄▄▃▂▃▃▃▃▃▃▃▂▃▃▃▂▂▃▂▂▂▂243.2131.4128.1161.042.338.962.949.063.23352.17639.68344.36575.18846.16758.97447.14361.6951.19648.5255.68769.06254.102-22.11573.03673.77757.47233.12443.86938.19449.21340.18852.2860.17939.24827.89249.49246.03537.31633.4234.47139.69124.51216.10230.58821.126NA
us-gaap:IncomeTaxExpenseBenefit █▆▆▇▅▅▅▅▅▅▅▅▆▅▁▆▆▆▆▆▆▆▅▆▆▆▅▆▆▆▆▆▆▆▅▆▆▅▅▅▅▅▅▅▅52.329.428.034.612.29.114.811.014.00813.5288.9659.58718.72510.353-51.51517.26222.55717.25717.69220.32122.48219.81111.27127.77527.46721.65714.44717.70721.33217.9118.46719.51522.79117.1310.7618.15717.4114.19912.56512.97715.0089.155.53311.6038.357NA
us-gaap:IncomeTaxesPaidNet █▂▆▆▂▁▃▄52.51.037.833.0-0.6-6.213.515.4NANA9.818.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpense us-gaap:HedgingDesignation,us-gaap:IncomeStatementLocation,us-gaap:StatementEquityComponents us-gaap:Nondesignated,gpi:FloorplanInterestExpense,us-gaap:AccumulatedOtherComprehensiveIncome1.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpenseDebt NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▁▄▁▃▆▂█▂█▃█▃█▃▇13.325.314.820.737.119.942.218.742.521.944.221.542.620.341.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss █▅▅▆▃▃▄▃▄▃▃▃▄▃▅▃▃▃▃▃▃▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▂191.0101.9100.1126.430.229.848.138.049.22538.64830.71834.77856.46335.814110.48929.88139.13333.93930.82835.36646.5834.291-33.38645.26146.3135.81518.67726.16216.86231.30321.72132.76537.38822.11817.13231.33528.62523.11720.85521.49424.68315.36210.56918.98512.769NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▅▅▆▃▃▄▃▄▃▃▃▄▃▅▃▃▃▃▃▃▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃184.598.596.5121.929.128.746.436.647.38137.1929.6133.59654.54734.605106.63728.85737.74432.68929.60933.93944.69532.943-32.07543.53244.51834.42717.99225.12716.18730.06220.90231.30535.69921.12616.38829.63326.99721.91119.6620.22923.25714.446NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted █▅▅▆▃▃▄▃▄▃▃▃▄▃▅▃▃▃▃▃▃▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃184.598.596.5121.929.128.746.436.647.38337.19329.6133.59754.54734.606106.63728.85837.74432.68929.6133.9444.69632.943-32.07643.53244.51834.42717.97825.16216.24330.14720.96531.44535.79621.18816.44329.69427.04921.95219.68420.23823.26314.451NANANANA
us-gaap:OperatingIncomeLoss █▅▅▆▃▃▃▃▄▃▃▃▄▃▃▃▃▃▃▃▄▃▁▃▄▃▂▃▃▃▃▃▃▂▂▃▃▂▂▂▂▂▂▂▂265.8152.7150.1187.179.069.996.583.397.13786.79874.778.19109.16579.07490.99678.50892.23180.13776.91783.91697.3682.0412.94596.64398.0280.73156.4190.35784.70470.63961.11672.94180.62258.64345.8867.05363.08853.97549.77350.07954.43739.21431.94446.50336.026NA
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▄█▅▅▄▁▅▄▃▄-6.930.26.61.0-4.9-31.16.7-5.4-9.761-4.6NANA3.778NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▇▆█▇▆▂█▄▅▆▆▅▃▇▆▇▆▆▅▅▅▆▆▁▇▂▃▃▇▇▅▆▃▅▆▆▆▆▆▆7.2-2.315.76.0-2.5-27.915.9-11.6-4.023.607-1.933-5.908-24.1867.871-1.9378.3994.4624.137-8.827-6.341-6.0682.1552.445-36.3079.999-30.594-18.919-21.9386.3958.215-8.2143.237-19.268-7.456-0.0071.856-1.41.394-0.436-0.978NANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▆██▆▅▁█▄▅▆▅▆▄▇▆▇▆▆▇▆▅▅▆▂▇▃▄▄▆▆▅▆▅▅▆▆▅▆▆▅0.327.922.27.0-7.3-59.022.5-17.0-13.781-0.977-8.878-2.386-20.40817.2763.1899.8533.8816.79510.502-3.041-9.548-6.8727.821-42.46513.783-35.14-22.484-19.5724.3157.435-5.3322.337-9.863-5.7621.231-1.128-6.7242.8-1.25-10.831NANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▆▆▆▄▅▆▆▆▆▆▆▆▆▆▆▅▅▅▆▅▅▅▅▅▄▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▂▁3700.43010.02990.13039.62131.22690.83111.43118.33005.6892808.3762908.8122889.0582943.4622860.0262920.4053012.2922672.1952518.8292673.6322823.1762782.4492608.3552672.6022800.5692726.482432.8542538.942626.4482511.6382260.8632279.4922340.1472335.111963.8321938.9571976.5721895.8261664.7451625.9291570.3891474.1451409.3021437.7521461.7551418.5091191.153
us-gaap:Revenues █▆▆▆▄▅▆▆▆▆▆▆▆▆▆▆▅▅▅▆▅▅▅▅▅▄▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▂▁3700.43010.02990.13039.62131.22690.83111.43118.33005.6892808.3762908.8122889.0582943.4622860.0262920.4053012.2922672.1952518.8292673.6322823.1762782.4492608.3552672.6022800.5692726.482432.8542538.942626.4482511.6382260.8632279.4922340.1472335.111963.8321938.9571976.5721895.8261664.7451625.9291570.3891474.1451409.3021437.7521461.7551418.5091191.153
us-gaap:SellingGeneralAndAdministrativeExpense █▆▅▆▃▆▇▇▇▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▂▂▂▂▁▁▁▁▁376.7318.4298.4305.8237.2328.0338.0354.0338.715327.708323.847316.771308.092324.347309.521328.327298.568289.779279.071299.006299.022293.664279.783289.012280.568271.469268.203264.233271.97257.558245.401246.863251.159233.433218.925216.082214.327199.112188.109188.185183.051175.884170.839173.925182.465NA
  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 ▇▇▇▇▇██▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▃▂▂▂▂▁▁4855.95065.15089.44983.44859.65441.15570.25329.05225.7615263.4915001.0754880.8664886.7425058.4784871.0654730.9944644.5854489.3634461.9034421.0644500.84533.8464414.9294292.054302.9744098.4674141.4923962.5093976.893825.9373819.4783409.9083409.3183425.963023.0152866.7852795.2572599.8242476.3432195.3022247.877NA2201.964NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇▇▇▇▇██▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▃▂▂▂▂▁▁4855.95065.15089.44983.44859.65441.15570.25329.05225.7615263.4915001.0754880.8664886.7425058.4784871.0654730.9944644.5854489.3634461.9034421.0644500.84533.8464414.9294292.054302.9744098.4674141.4923962.5093976.893825.9373819.4783409.9083409.3183425.963023.0152866.7852795.2572599.8242476.3432195.3022247.877NA2201.964NANANA
us-gaap:StockholdersEquity █▇▆▅▄▄▄▄▄▃▃▄▄▄▃▃▂▂▂▂▂▂▂▂▃▂▂▂▂▃▃▃▂▂▂▁▁▁▁▁▁1754.01576.61449.61356.91215.91174.61255.71186.31164.0651127.7131095.6941148.3461172.6121178.0791124.2821011.147971.648968.96930.2886.972867.552912.793918.252969.3281004.151959.827978.01985.325967.071057.061035.1751022.942990.489961.157860.284842.284845.774798.965807.1788.764813.906NA784.368NANANA
  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 ▄▅▆▅▅▇█▇▇█▇▇▇█▇▇▇▆▆▆▇▇▇▆▆▆▆▅▆▅▆▄▅▅▄▃▃▂▂▁▁1689.81911.22004.21916.61834.62399.32516.32386.52362.1342433.0712402.3662248.7062271.8262413.1982329.1862232.6552293.8722153.0772150.5872098.4382201.9572254.0792202.9552044.792099.3651982.4892035.2191929.2552024.2031936.2731967.9381707.9751730.81739.0551566.1811446.7311385.1111251.2421175.584937.433995.608NA1019.234NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▄▄▃▃▂▂▂▂▂▁▂▂▂▂▃▂▂▂▂▂▂▁▂▂▂▂▃▂▁▂▂▁▁▁▂▁▂▁▁▁▂▂▄▂198.782.987.366.272.719.223.841.037.7433.62315.93232.02741.57533.0928.78766.88326.57333.7720.99222.91824.96522.38113.03721.96824.22526.27940.97550.65221.29517.68720.21526.27810.85217.7294.6538.8229.54421.31614.89511.312.28544.80419.84396.16232.186NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▃▄▃▃▁▁▂▂▂▁▂▂▂▁▃▁198.782.987.366.272.719.228.144.641.5436.85518.7234.39143.63234.55929.63167.50427.304NA24.246NANANA17.051NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryNet ▃▄▅▅▄██▇▇▇▇▇▇▇▇▆▇▇▆▆▇▇▇▆▆▆▆▅▅▅▆▄▅▄▄▃▃▂▂▁▁1030.21320.41468.01375.71327.11992.61901.71792.71793.6711860.9071844.0591733.7561721.2491804.1761763.2931651.7891803.9091729.5251651.8151687.3791784.1141826.5311737.7511634.4211657.1051547.4361556.7051490.521514.2741537.1121542.3181351.7191358.2941353.121194.2881107.1931071.927966.209867.47719.677779.679NA777.771NANANA
us-gaap:OtherAssetsCurrent ▆▆▅█▇▁▃19.419.318.422.621.112.315.5NANANA26.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANANA441.9421.6405.7400.2380.5369.1359.112347.342335.988331.431321.222308.388301.977290.912277.214264.446259.153251.585244.181235.138228.473223.252212.859203.37196.709190.329187.741177.73171.532165.763178.161163.037160.713155.524143.945137.161NANANA117.147NANANA
us-gaap:PropertyPlantAndEquipmentNet NANA1608.21592.01548.91549.01547.11484.81422.9861370.7431347.8351350.9291348.5211357.871318.9591269.3971167.3451152.3951125.8831118.7851081.2321063.8521033.981978.892965.363944.485950.388859.339837.821827.121796.356716.514706.293699.94667.768649.811638.971604.831585.633550.908550.134NA506.288NANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementBusinessSegments gpi:BrazilSegmentNANA23.9NANANA24.7NANANA24.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementBusinessSegments gpi:UnitedKingdomSegmentNANA281.3NANANA271.0NANANA199.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementBusinessSegments gpi:UnitedStatesSegmentNANA1303.1NANANA1251.4NANANA1124.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill ███████▇▇▇▇▇▇▇▆▇▆▆▆▆▆▆▆▆▆▆▅▅▅▄▄▃▃▃▂▂▂▁▁▁▁1018.71019.1997.1993.5989.7999.81008.3979.0963.502965.882963.925968.771945.835960.11913.034914.224878.776877.04876.763880.393881.981886.293854.915912.639887.2847.672830.377824.996786.264747.091737.303689.871680.857681.082582.384564.898563.181546.346531.458526.487526.651NA507.962NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill NANA232.8NANANA253.5NANA260.465259.63276.285287.366295.626285.632294.12285.689285.311284.876310.513322.974319.895307.588NANANA303.947NANANA301.505279.806274.973285.063196.058NANANA170.687NANANA158.694NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:StatementBusinessSegments gpi:UnitedKingdomSegmentNANA19.4NANANA30.4NANA35.92935.092NANANA29.483NANANA17.337NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:StatementBusinessSegments gpi:UnitedStatesSegmentNANA213.4NANANA223.1NANA224.394224.394NANANA255.981NANANA260.534NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▅▂▄▄█▇█▂▁▆213.2204.8209.9209.9219.1218.7220.1204.7202.719214.776NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ██▅▄▄▃▄▃▂▃▄▅▅▅▃▃▃▃▃▂▂▁▂▂▃▂▃▂▂▂▂▂▂▃▁▁▂▂▂▂▁51.753.637.230.026.722.524.821.114.8818.55427.31936.17533.19431.67424.25420.59818.90321.5423.79412.93512.6569.72715.4915.96619.23518.07121.56113.24914.18914.27816.37615.74216.39520.8210.62411.17512.45914.63512.98113.6568.618NA9.786NANANA
  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 ▆▇▇▆▇▆█▇▇█▆▆▇▇▆▆▅▅▅▅▄▅▄▄▄▃▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁424.4439.9442.6408.3442.7410.7527.5483.3485.908507.348419.35428.441442.577491.841412.981436.851330.747347.746356.099354.957313.219327.594280.423290.509304.361250.526288.32292.971283.491280.454254.93201.699237.573255.336167.439164.922166.127144.128148.048128.49109.079NA92.799NANANA
us-gaap:AccruedLiabilitiesCurrent █▇▆▇▅▅▆▆▅▆▅▆▅▅▄▆▄▅▄▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁267.8243.9226.9230.4199.9197.1206.7213.8198.017208.069197.494207.082189.027194.248177.07208.77173.173185.72176.469193.553182.108194.87185.323158.283161.123169.567172.463160.22142.665150.319140.543133.777144.361136.914128.118117.892117.625113.06109.24592.3695.332NA83.663NANANA
us-gaap:LiabilitiesCurrent ▃▄▅▅▅█▇▇▇▇▇▆▆▇▆▆▆▆▆▆▆▆▆▅▆▅▅▅▅▅▅▄▄▄▃▃▃▂▂▁▁1272.01712.51842.71812.11775.12640.42422.32397.32335.342436.7422386.5652190.6662116.7612267.1582198.4872136.2832126.8542021.2752053.1172026.5492111.8742103.3532039.471981.8472010.5991817.1061922.1991802.6391813.0471850.9191865.1761584.5171642.8421663.1871395.5781268.7911270.3151122.0811044.947801.919857.221NA894.934NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▄▁▃▃▆██▇▆▇22.020.221.521.523.624.424.623.923.50423.907NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 us-gaap:DebtInstrument gpi:BrazilNoteNANANA11.311.911.016.62.02.12.42.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument gpi:U.K.NotesNANANA90.277.778.975.265.870.073.873.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument gpi:U.S.NotesNANANA526.6531.0366.0361.5315.1330.7326.9343.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:BrazilNote,gpi:OtherDebt█▁12.611.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:BrazilNote,gpi:RealEstateRelatedandOtherLongTermDebtNANA12.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:FMCCFacility,us-gaap:LineOfCredit▁▂▃▄▄█▇▆▆26.869.695.2114.7129.0235.4204.5166.7177.523NA160.686NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:FloorplanNotesPayable,us-gaap:LineOfCredit▁▄▅▅▄████185.4576.6741.2732.2664.01125.11099.11164.81098.936NA1217.765NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:FloorplanNotesPayableManufacturerAffiliates,us-gaap:LineOfCredit▁▃▃▂▄█▇▆▆274.0327.8327.5314.8357.7484.9459.9410.5426.486NA417.824NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:FloorplanNotesPayableandOther,us-gaap:LineOfCredit▁▄▅▅▄███▇224.5616.4767.6771.3696.61168.61144.41199.81129.877NA1258.815NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:OtherManufacturerAffiliateFacilities,us-gaap:LineOfCredit▇█▅▁▄▇█▆▇247.2258.1232.3200.1228.7249.5255.4243.8248.963NA257.138NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:OtherNonManufacturerAffiliateFacilities,us-gaap:LineOfCredit▆▆▁▆▃▇█▄▃39.139.826.439.032.643.545.335.030.941NA41.05NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:U.K.Notes,gpi:OtherDebt█▁98.491.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:U.K.Notes,gpi:RealEstateRelatedandOtherLongTermDebtNANA92.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:U.S.Notes,gpi:OtherDebt█▁513.0507.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType gpi:U.S.Notes,gpi:RealEstateRelatedandOtherLongTermDebtNANA514.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:LongtermDebtType gpi:RealEstateRelatedandOtherLongTermDebtNANA619.8NANANA453.3NANANA343.8NANANA350.0NANANA321.9NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations ▇▇▇▇▇▆█▇▇▇▇▇▇█▇▇▇▇▆▇▇▇▆▆▅▅▅▄▄▃▃▂▂▂▂▂▁▁▁▁▁1322.01282.61294.71307.81360.71137.71432.11308.01295.721262.5821281.4891304.1271357.9981376.771318.1841292.6891263.8451224.7181212.8091232.7171250.941256.6791203.4361084.1611041.8521077.9641008.837938.499938.575665.042663.689560.427541.709549.739555.016546.094516.97494.745482.601473.193453.717NA412.95NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ██▄▂▂▂▅▁▂▂▂156.4158.0141.0135.4135.4135.8145.7131.4134.649136.219134.683NANANA124.404NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent █▇▆▆▆▅▅▆▅▅▅▅▅▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁143.4134.5113.2114.8109.0102.0103.6110.5102.56693.474100.94899.45799.29698.15997.12593.47489.95387.87683.80581.78580.53478.91571.86569.69469.53467.70365.89664.25955.949.05247.97546.244.8144.4442.41341.04740.70238.61336.4733.25233.436NA31.036NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▆▃▆▆█▆▇▂▁▅208.1200.8207.6207.1214.2208.9210.7195.5193.421204.331NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA33.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA31.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA26.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA24.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA182.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 █▇▆▅▄▄▄▄▄▃▃▄▄▄▃▃▂▂▂▂▂▂▂▂▃▂▂▂▂▃▃▃▂▂▂▁▁▁▁▁▁1754.01576.61449.61356.91215.91174.61255.71186.31164.0651127.7131095.6941148.3461172.6121178.0791124.2821011.147971.648968.96930.2886.972867.552912.793918.252969.3281004.151959.827978.01985.325967.071057.061035.1751022.942990.489961.157860.284842.284845.774798.965807.1788.764813.906NA784.368NANANA
us-gaap:CommonStockValue ████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▁▂▂▂▂▂▂0.30.30.30.30.30.30.30.30.2550.2550.2550.2550.2550.2550.2550.2550.2560.2560.2570.2570.2570.2570.2570.2570.2580.2580.2570.2580.2580.2580.2570.2590.2590.2590.2580.260.2610.2610.260.2620.262NA0.261NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▃▃▃▁█████▆▆█▆███313.6305.7308.3304.0300.0287.8295.3291.9288.197287.115292.774290.668288.492286.244291.461288.97287.41285.455290.899287.018284.887283.196291.092288.754287.045283.94286.854286.354259.783368.728368.641369.198367.569363.511332.836334.942368.069330.533363.375368.776367.303NA363.966NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▇▆▆▆▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁2099.11914.21817.91723.31596.91566.71542.41499.81466.9631422.5761394.8171368.9461339.1851288.0521246.3231141.0661116.1951082.1011053.3011027.393996.944955.326926.169964.703924.473882.995852.057838.174816.056803.302776.101758.498729.869696.366677.864664.124636.182610.986591.037573.12554.64NA519.843NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▃▂▁▁▁▃▃▃▄▄▄▄▅▄▄▄▄▃▃▃▃▄▃▅▄▆▆▇▇▇▇▇▇▇▇▇██████-155.9-156.2-184.0-206.3-213.3-206.0-147.0-169.5-152.53-138.749-137.772-128.894-126.358-105.95-123.226-126.415-136.268-140.149-146.944-157.446-154.404-144.856-137.984-145.805-103.341-117.124-81.984-59.5-39.928-44.242-51.677-46.345-48.682-38.819-33.057-34.288-33.16-26.436-29.236-27.986-17.155-15.618-18.755NANANA
us-gaap:TreasuryStockValue ███▇▇█▇▇▇▇▇▆▅▅▅▅▅▄▄▄▄▃▃▂▂▂▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂503.1487.3492.8464.3467.9474.1435.3436.2438.82443.484454.38382.629328.962290.522290.531292.729295.945258.703267.313270.25260.132181.13161.282138.581104.28490.24279.17479.96169.09970.98658.14758.66858.52660.16117.617122.754125.578116.379118.336125.40891.144NA80.947NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▃▃▂▂█▂▂▂▂▃▂▂▂▃▂▂▂▃▃▂▂▂▂▂▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁6.86.45.2999999999999965.316.65.14.44.43.916.0674.4624.34.2355.6294.2824.1354.3756.0636.0774.6374.6125.4444.9875.0895.994.8734.1273.9754.2143.6473.4153.4993.5443.3912.9763.0013.0212.8822.5752.775NANANANANANA
  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 ▇▄▃▂█▂▃▃▃▃▁▃▃▃▁▄▂▃▂▄▃▃▁▃▂▃▁▃▂▃▁▂▂▃▁▂▂▂▁▃▃▃▂▂512.8239.392.724.5644.144.160.157.852125.009127.939-87.43794.309114.324148.782-110.942255.182-16.87671.561-1.755213.74556.792116.075-89.821150.29322.40858.167-73.548140.903-2.259133.192-76.59441.65825.38261.926-68.03138.43-36.271-9.45-101.802100.744145.91954.455-16.2813.866NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▅▇▇▆▆▄▃▅▇▆▅█▄▅▃▅▆▇▆▆▅▇▄▄▅▅▅▄▅▁▇▇▅▆▆▅▅▅▆▅▆▆▇-17.1-76.74.1-17.6-30.1-31.1-98.1-121.895-64.819-6.786-22.529-57.64528.54-116.367-65.865-126.929-77.924-41.88-17.017-49.153-36.823-71.047-9.642-109.224-93.795-71.841-79.417-73.271-113.278-81.085-202.068-8.0061.688-60.268-43.124-28.551-80.274-72.509-63.975-21.322-81.485-45.991-39.803-5.886NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▅▆▁▆▆▆▅▅▆▅▅▅▇▅▆▆▆▄▆▅▆▅▆▆▇▅▇▅█▆▅▆▆▆▇▆▇▅▅▆▆▆-381.5-165.6-77.7-11.4-560.5-18.523.167.668-55.269-102.49994.699-45.776-130.932-27.534139.586-88.69387.746-17.16317.046-166.728-18.8-36.52590.778-39.69267.9621.961144.852-36.625105.804-42.381274.448-16.558-33.49411.59777.00120.189105.50188.132169.441-80.239-96.93116.378-20.10765.787NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▃▄▂▅▂▂▃▃▄▂▂▃▃▁▅115.7-4.321.1-6.553.5-8.9-16.63.084.68518.135-15.671-9.2419.0734.928-37.87340.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 ▇▇▇▇▇▇█▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇█▇▇▇▇█▇▇▇▇█-1.55.91.90.2-2.6-0.412.6-1.5381.054.088-0.614-1.5032.9162.675-62.1655.0075.5925.503-0.1856.3632.9845.0-1.2515.0354.783.325.825-2.4165.9972.9135.8117.3130.1619.1272.5274.683.0123.0638.5442.177.0627.0481.0510.062NANA
us-gaap:DepreciationDepletionAndAmortization ███████▇▇▇▇▇▆▆▆▆▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁18.819.519.319.118.818.618.618.017.86416.99717.10916.98116.63816.34215.17815.05914.09313.60613.16712.89112.71312.46411.79811.81111.94611.68410.9210.74610.7539.9259.4369.0938.8848.4138.468.0967.7427.2367.1826.8456.5816.455NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▄▃▂█▂▃▃▃▃▁▃▃▃▁▄▂▃▂▄▃▃▁▃▂▃▁▃▂▃▁▂▂▃▁▂▂▂▁▃▃▃▂▂512.8239.392.724.5644.144.160.157.852125.009127.939-87.43794.309114.324148.782-110.942255.182-16.87671.561-1.755213.74556.792116.075-89.821150.29322.40858.167-73.548140.903-2.259133.192-76.59441.65825.38261.926-68.03138.43-36.271-9.45-101.802100.744145.91954.455-16.2813.866NANA
us-gaap:NetIncomeLoss █▅▅▆▃▃▄▃▄▃▃▃▄▃▅▃▃▃▃▃▃▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▂191.0101.9100.1126.430.229.848.138.049.22538.64830.71834.77856.46335.814110.48929.88139.13333.93930.82835.36646.5834.291-33.38645.26146.3135.81518.67726.16216.86231.30321.72132.76537.38822.11817.13231.33528.62523.11720.85521.49424.68315.36210.56918.98512.769NA
us-gaap:ShareBasedCompensation ▃▃▂▂█▂▂▂▂▃▂▂▂▃▂▂▂▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁6.86.45.2999999999999965.316.65.14.44.3973.9036.14.54.44.35.6424.2944.14.46.0746.1944.6584.6585.5114.6844.74.5647326500000014.8884.1414.04.23.663.4263.53.63.4032.9883.03.02.8942.5862.82.82.7442.4372.329NANA
  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 ▇▅▇▇▆▆▄▃▅▇▆▅█▄▅▃▅▆▇▆▆▅▇▄▄▅▅▅▄▅▁▇▇▅▆▆▅▅▅▆▅▆▆▇-17.1-76.74.1-17.6-30.1-31.1-98.1-121.895-64.819-6.786-22.529-57.64528.54-116.367-65.865-126.929-77.924-41.88-17.017-49.153-36.823-71.047-9.642-109.224-93.795-71.841-79.417-73.271-113.278-81.085-202.068-8.0061.688-60.268-43.124-28.551-80.274-72.509-63.975-21.322-81.485-45.991-39.803-5.886NANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃▄▃▂▃▃▅▃▇▄▂▃▄▅▇█▂▅▃▆▄▄▄▃▃▃▆▂▄▃▄▂▃▂▂▃▂▂▂▂▁▂▅▁26.537.324.418.328.931.652.330.26267.52741.71122.81829.98540.28247.94871.52277.04420.81546.45130.82955.4236.5733.70241.91329.85325.32923.15759.04722.61941.63127.09538.96816.5927.32919.97120.61429.44320.81717.61715.50621.588.16615.30646.4179.023NANA
  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 ▃▄▅▆▁▆▆▆▅▅▆▅▅▅▇▅▆▆▆▄▆▅▆▅▆▆▇▅▇▅█▆▅▆▆▆▇▆▇▅▅▆▆▆-381.5-165.6-77.7-11.4-560.5-18.523.167.668-55.269-102.49994.699-45.776-130.932-27.534139.586-88.69387.746-17.16317.046-166.728-18.8-36.52590.778-39.69267.9621.961144.852-36.625105.804-42.381274.448-16.558-33.49411.59777.00120.189105.50188.132169.441-80.239-96.93116.378-20.10765.787NANA
us-gaap:PaymentsOfDividendsCommonStock █▇▇▁▁▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄6.15.65.50.00.05.55.55.1094.854.8414.8585.1785.3415.4955.2455.0215.055.154.9334.934.9765.1485.1615.0444.8454.8924.8064.0564.124.1154.1294.1513.8983.6273.4043.423.4293.182.9493.0142.6292.619NANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA31.30.00.048.91.40.00.00.075.29557.34742.0779.1990.01.06939.0250.00.012.3683.30131.94530.72733.62516.94616.17519.8550.0050.016.9423.5530.0-0.3920.3920.02.8219.116-0.625.86530.903NANA0.07.522NANA
  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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0255000.0255000.0255000.0255000.0255000.0255000.0255000.0255000.0256000.0256000.0257000.0257000.0257000.0257000.0257000.0257000.0258000.0258000.0257000.0258000.0258000.0258000.0257000.0259000.0259000.0259000.0258000.0260000.0261000.0261000.0260000.0262000.0262000.0261000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value17171717171817171920202020202021222323232426252624242222222223222223
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
Value17171717171817171920202020202021222323232323232323222121212222222223
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

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
Value10.45.545.446.861.641.622.572.042.652.091.621.742.721.75.271.431.841.581.441.652.121.47-1.411.881.911.470.771.070.71.290.891.341.530.950.751.381.251.010.920.981.10.640.450.850.550.33
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value10.355.525.436.831.631.612.572.042.642.081.621.742.721.75.271.431.841.581.441.652.121.47-1.411.881.911.470.771.030.621.190.811.191.430.880.71.321.20.970.90.941.060.640.450.830.540.32
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 Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value19112912213322-29.3702135372132365311339434041323727-25.5652.796600.675-3.8076.592138163527161830212519102318
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.24.30.04.41.1-1.12.30.71.21.30.81.11.21.93.91.31.61.61.51.11.31.1-1.00.12.20.0-0.10.30.81.70.71.51.20.80.91.51.21.61.20.71.61.3

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value303925192508252717722274264626522551237624762453250524402494258022672135228424162372221922922402233420682172225121421922195820101993166316581685161014041380132112291187122012321191
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.183.70.083.283.284.585.185.184.984.685.184.985.185.385.485.784.884.885.485.685.385.185.885.885.685.085.685.785.385.085.985.985.484.785.585.384.984.484.984.283.484.384.984.384.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

gpi:NewVehiclesRetail


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
Value1690144414901481998127915971577149513431491146114781438157116211373
Percentage of CostOfGoodsAndServicesSold55.657.359.458.656.456.360.459.458.656.560.259.659.058.963.062.860.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.748.00.048.746.947.551.350.649.847.851.350.650.250.353.853.851.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewVehiclesRetail91.193.60.093.794.095.30.095.495.595.00.095.095.195.00.094.894.8

gpi:PartsAndService


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
Value175159164169132172174175174170169162163162160158152
Percentage of CostOfGoodsAndServicesSold5.86.36.66.77.47.66.66.66.87.26.86.66.56.76.46.16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.75.30.05.66.26.45.65.65.86.15.85.65.55.75.55.25.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:PartsAndService44.744.30.045.146.846.60.045.746.046.20.046.045.546.50.046.046.1

gpi:UsedVehiclesRetail


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
Value1086839769796594736792815785771730742770737668695641
Percentage of CostOfGoodsAndServicesSold35.733.330.731.533.632.430.030.730.832.529.530.230.830.226.827.028.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.427.90.026.227.927.425.526.226.127.525.125.726.225.822.923.124.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesRetail90.993.40.091.892.894.60.093.893.694.20.093.793.894.40.093.793.5

gpi:UsedVehiclesWholesale


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
Value877684804685818496918686921029410599
Percentage of CostOfGoodsAndServicesSold2.93.03.43.22.63.83.13.23.83.93.53.53.74.23.84.14.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.50.02.72.23.22.62.73.23.33.03.03.13.63.23.53.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesWholesale90.595.10.093.195.798.80.099.5100.199.50.0100.499.798.40.0100.2100.3

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-022020-09-302020-04-022020-06-302019-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value0.03.3-3.3-10.4-10.40.00.00.00.00.00.0-22.79-23.6140.00.00.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.10.0-0.50.00.00.00.00.00.0-0.9-0.90.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:StatementBusinessSegments

gpi:UnitedStatesSegment


Gains
Period End2020-12-312020-09-302020-06-30
Value27-3.310
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0-100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.10.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UnitedStatesSegment0.0-0.10.6

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
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
Value661490481512358416464465454431432435438419425431404383389406410389380398391363365374369338321329341300280291285260245248244221217228226204
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.916.30.016.816.815.514.914.915.115.414.915.114.914.714.614.315.215.214.614.414.714.914.214.214.415.014.414.314.715.014.114.114.615.314.514.715.115.615.115.816.615.715.115.716.017.2

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value243131128161423862496352394475465847615148556954-22.11573735733433849405260392749463733343924163021
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.64.40.05.32.01.42.01.62.11.91.41.52.61.62.01.62.32.01.82.02.52.1-0.82.62.72.41.31.71.52.21.82.22.62.01.42.52.42.22.12.22.71.71.12.11.5

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.01.41.91.0-12.8-0.62.31.80.93-0.4351.589-1.70.23-0.08
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments1.21.11.50.6-30.3-1.53.73.71.5-0.84.0-3.80.3-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.00.0-0.6-0.00.10.10.0-0.00.1-0.10.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:BrazilSegment4.02.50.01.8-35.0-0.60.01.60.8-0.40.0-1.70.2-0.1

gpi:UnitedKingdomSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value258.49.527-19.7-2.7-2.6-7.4-1.546.244-1.0912.76.0165.737
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments10.46.47.416.8-46.6-6.9-4.1-15.1-2.412.0-2.76.18.012.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.30.00.9-0.9-0.1-0.1-0.2-0.10.2-0.00.10.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UnitedKingdomSegment3.61.50.03.7-7.5-0.50.0-1.3-0.31.00.00.50.90.9

gpi:UnitedStatesSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value21512111613274426354634639436840
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments88.492.591.282.5176.8108.5100.3111.4101.088.998.897.891.787.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.84.00.04.43.51.62.01.82.11.71.31.52.31.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UnitedStatesSegment7.45.10.05.94.12.10.02.32.82.20.02.03.21.9

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value52292834129.1141114138.9659.5871810-51.51517221717202219112727211417211718192217101817141212159.155.533118.357
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.00.01.10.60.30.50.40.50.50.30.30.60.4-1.80.60.80.70.70.70.80.80.41.01.00.90.60.70.80.80.80.81.00.90.60.90.90.90.80.81.00.60.40.80.6

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value521.03733-0.6-6.213159.818
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.00.01.1-0.0-0.20.40.50.30.6

Interest Expense

us-gaap:InterestExpense us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents

us-gaap:InterestExpense

us-gaap:Nondesignated, gpi:FloorplanInterestExpense, us-gaap:AccumulatedOtherComprehensiveIncome


Interest
Period End2021-06-30
Value1000000.0
Percentage of InterestExpense100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Nondesignated gpi:FloorplanInterestExpense us-gaap:AccumulatedOtherComprehensiveIncome0.0

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2020-09-022020-04-02
Value6900000.04600000.0
Percentage of InterestExpenseDebt100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value132514203719421842214421422041
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.80.00.71.70.71.40.61.40.81.50.71.40.71.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1911011001263029483849383034563511029393330354634-33.38645463518261631213237221731282320212415101812
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.23.40.04.21.41.11.51.21.61.41.11.21.91.33.81.01.51.31.21.31.71.3-1.21.61.71.50.71.00.71.41.01.41.61.10.91.61.51.41.31.41.71.10.71.30.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302020-06-302020-03-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value19130291863830345635110293933303546344546353128232021
Percentage of NetIncomeLoss100.0100.0100.0490.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.21.41.16.01.41.11.21.91.33.81.01.51.31.21.31.71.31.61.71.51.61.51.41.31.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value18498961212928463647372933543410628373229334432-32.07543443417251630203135211629262119202314
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.03.30.04.01.41.11.51.21.61.31.01.21.91.23.71.01.41.31.11.21.61.3-1.21.61.61.40.71.00.61.30.91.31.51.10.81.51.41.31.21.31.61.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value18498961212928463647372933543410628373229334432-32.07643443417251630203135211629272119202314
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.03.30.04.01.41.11.51.21.61.31.01.21.91.23.71.01.41.31.11.21.61.3-1.21.61.61.40.71.00.61.30.91.31.51.10.81.51.41.31.21.31.61.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value26515215018779699683978674781097990789280768397822.94596988056908470617280584567635349505439314636
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.25.10.06.23.72.63.12.73.23.12.62.73.72.83.12.63.53.22.93.03.53.10.13.53.63.32.23.43.43.12.73.13.53.02.43.43.33.23.13.23.72.82.23.22.5

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-6.9306.61.0-4.9-31.16.7-5.4-9.761-4.63.778
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.21.00.00.0-0.2-1.20.2-0.2-0.3-0.20.1

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
Value7.2-2.3156.0-2.5-27.915-11.6-4.023.607-1.933-5.908-24.1867.871-1.9378.3994.4624.137-8.827-6.341-6.0682.1552.445-36.3079.999-30.594-18.919-21.9386.3958.215-8.2143.237-19.268-7.456-0.0071.856-1.41.394-0.436-0.978
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 RevenueFromContractWithCustomerExcludingAssessedTax0.2-0.10.00.2-0.1-1.00.5-0.4-0.10.1-0.1-0.2-0.80.3-0.10.30.20.2-0.3-0.2-0.20.10.1-1.30.4-1.3-0.7-0.80.30.4-0.40.1-0.8-0.4-0.00.1-0.10.1-0.0-0.1

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
Value0.327227.0-7.3-59.022-17.0-13.781-0.977-8.878-2.386-20.408173.1899.8533.8816.79510-3.041-9.548-6.8727.821-42.46513-35.14-22.484-19.5724.3157.435-5.3322.337-9.863-5.7621.231-1.128-6.7242.8-1.25-10.831
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 RevenueFromContractWithCustomerExcludingAssessedTax0.00.90.00.2-0.3-2.20.7-0.5-0.5-0.0-0.3-0.1-0.70.60.10.30.10.30.4-0.1-0.3-0.30.3-1.50.5-1.4-0.9-0.70.20.3-0.20.1-0.4-0.30.1-0.1-0.40.2-0.1-0.7

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
Value3700301029903039213126903111311830052808290828892943286029203012267225182673282327822608267228002726243225382626251122602279234023351963193819761895166416251570147414091437146114181191
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:ProductOrService

gpi:NewAndUsedVehicles


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
Value31472522249925341752220726022607250023252430241824702398246225582234
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax85.183.883.683.482.282.083.683.683.282.883.583.783.983.984.384.983.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax85.183.883.683.482.282.083.683.683.282.883.583.783.983.984.384.983.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewAndUsedVehicles100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewVehiclesRetail


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
Value18551543159515801062134216811652156514141572153915551513166117101448
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.151.353.452.049.949.954.153.052.150.454.153.352.852.956.956.854.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.151.353.452.049.949.954.153.052.150.454.153.352.852.956.956.854.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewVehiclesRetail100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:PartsAndService


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
Value392360361375282370379383378369354354358349343343331
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.612.012.112.413.213.812.212.312.613.112.212.312.212.211.811.412.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.612.012.112.413.213.812.212.312.613.112.212.312.212.211.811.412.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:PartsAndService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesRetail


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
Value1195898818867641779838869838819771792821780709743685
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.329.927.428.530.129.027.027.927.929.226.527.427.927.324.324.725.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.329.927.428.530.129.027.027.927.929.226.527.427.927.324.324.725.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesRetail100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesWholesale


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
Value968086864886818595928686921049110499
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.72.92.92.33.22.62.73.23.33.03.03.23.63.13.53.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.72.92.92.33.22.62.73.23.33.03.03.23.63.13.53.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesWholesale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialService


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
Value16112712912996112129127127113123116115112114110106
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.24.34.34.54.24.24.14.24.04.34.03.93.93.93.74.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.24.34.34.54.24.24.14.24.04.34.03.93.93.93.74.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FinancialService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

gpi:NewAndUsedVehicles, gpi:BrazilSegment


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
Value644658453081105979889103899597
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.61.91.51.43.03.43.13.33.23.63.13.23.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.61.91.51.43.03.43.13.33.23.63.13.23.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewAndUsedVehicles gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewAndUsedVehicles, gpi:UnitedKingdomSegment


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
Value634482434664235520503515543567456519593593
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.116.014.521.911.019.416.216.518.120.215.718.020.220.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.116.014.521.911.019.416.216.518.120.215.718.020.220.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewAndUsedVehicles gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewAndUsedVehicles, gpi:UnitedStatesSegment


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
Value24481993200618251487160519931995185816681870180917811707
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.266.267.160.069.859.764.164.061.859.464.362.660.559.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.266.267.160.069.859.764.164.061.859.464.362.660.559.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewAndUsedVehicles gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewVehiclesRetail, gpi:BrazilSegment


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
Value4934433119577869746477647069
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.11.41.00.92.12.52.22.52.32.72.22.42.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.11.41.00.92.12.52.22.52.32.72.22.42.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewVehiclesRetail gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewVehiclesRetail, gpi:UnitedKingdomSegment


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
Value301263221376127296283290302318246278338354
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.18.77.412.46.011.09.19.310.111.38.59.611.512.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.18.77.412.46.011.09.19.310.111.38.59.611.512.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewVehiclesRetail gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewVehiclesRetail, gpi:UnitedStatesSegment


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
Value150412461330117291598813201291118810311249119611461089
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.741.444.538.643.036.742.441.439.636.743.041.439.038.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.741.444.538.643.036.742.441.439.636.743.041.439.038.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:NewVehiclesRetail gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:PartsAndService, gpi:BrazilSegment


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
Value9.27.98.58.05.99.61112121211111111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.30.30.30.40.40.40.40.40.40.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.30.30.30.40.40.40.40.40.40.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:PartsAndService gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:PartsAndService, gpi:UnitedKingdomSegment


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
Value5056556121565556565952535753
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.91.82.01.02.11.81.81.92.11.81.92.01.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.91.82.01.02.11.81.81.92.11.81.92.01.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:PartsAndService gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:PartsAndService, gpi:UnitedStatesSegment


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
Value332296297306254304312314309297290289288284
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.09.89.910.111.911.310.010.110.310.610.010.09.89.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.09.89.910.111.911.310.010.110.310.610.010.09.89.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:PartsAndService gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesRetail, gpi:BrazilSegment


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
Value111011107.5192222192121202124
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.40.40.40.70.70.70.60.80.70.70.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.40.40.40.70.70.70.60.80.70.70.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesRetail gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesRetail, gpi:UnitedKingdomSegment


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
Value30019117724892188184189194203171200208192
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.16.45.98.24.47.05.96.16.57.25.96.97.16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.16.45.98.24.47.05.96.16.57.25.96.97.16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesRetail gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesRetail, gpi:UnitedStatesSegment


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
Value882696629608540570632657625594579572592563
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.923.121.020.025.421.220.321.120.821.219.919.820.119.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.923.121.020.025.421.220.321.120.821.219.919.820.119.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesRetail gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesWholesale, gpi:BrazilSegment


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
Value2.62.03.12.42.93.85.04.44.8294.055.3824.23.5463.842
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.20.10.20.10.20.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.20.10.20.10.20.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesWholesale gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesWholesale, gpi:UnitedKingdomSegment


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
Value3227353915353535464539414646
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.91.21.30.71.31.11.11.61.61.41.41.61.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.91.21.30.71.31.11.11.61.61.41.41.61.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesWholesale gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesWholesale, gpi:UnitedStatesSegment


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
Value6150474430464145444241404254
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.71.61.51.41.71.31.51.51.51.41.41.51.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.71.61.51.41.71.31.51.51.51.41.41.51.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UsedVehiclesWholesale gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialService, gpi:BrazilSegment


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
Value1.41.41.61.10.61.72.01.91.7881.9843.0282.21.9971.872
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.10.00.00.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.10.00.00.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FinancialService gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialService, gpi:UnitedKingdomSegment


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
Value151011156.4131313141514121514
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.40.40.50.30.50.40.40.50.50.50.40.50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.40.40.50.30.50.40.40.50.50.50.40.50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FinancialService gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialService, gpi:UnitedStatesSegment


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
Value1431151161138997113112110961061019796
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.83.93.74.23.63.73.63.73.43.63.53.33.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.83.93.74.23.63.73.63.73.43.63.53.33.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FinancialService gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

gpi:BrazilSegment


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
Value745668543692119110112103118103108110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.31.81.73.43.83.63.73.74.13.63.73.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.31.81.73.43.83.63.73.74.13.63.73.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:BrazilSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UnitedKingdomSegment


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
Value700549501740263590572584614642523585666660
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.918.316.824.412.422.018.418.720.422.918.020.322.723.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.918.316.824.412.422.018.418.720.422.918.020.322.723.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UnitedStatesSegment


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
Value29242404242022441831200724192422227820622266220021682088
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.079.980.973.885.974.677.877.775.873.577.976.273.773.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.079.980.973.885.974.677.877.775.873.577.976.273.773.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gpi:UnitedStatesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value3700301029903039213126903111311830052808290828892943286029203012267225182673282327822608267228002726243225382626251122602279234023351963193819761895166416251570147414091437146114181191
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

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value376318298305237328338354338327323316308324309328298289279299299293279289280271268264271257245246251233218216214199188188183175170173182
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.210.610.010.111.112.210.911.411.311.711.111.010.511.310.610.911.211.510.410.610.711.310.510.310.311.210.610.110.811.410.810.510.811.911.310.911.312.011.612.012.412.511.911.912.9

us-gaap:SellingGeneralAndAdministrativeExpense us-gaap:Restatement

srt:RestatementAdjustment


Selling
Period End2021-06-30
Value10
Percentage of SellingGeneralAndAdministrativeExpense2.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:RestatementAdjustment0.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value485550655089498348595441557053295225526350014880488650584871473046444489446144214500453344144292430240984141396239763825381934093409342530232866279525992476219522472201
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Assetsus-gaap:
Period End2020-12-312019-12-312019-03-312018-12-312017-12-31
Value2988131131129
Percentage of Assets0.61.62.52.62.7
Percentage of Assets0.61.62.52.62.7
Percentage of Assets gpi:BrazilSegment100.0100.0100.0100.0100.0

gpi:UnitedKingdomSegment


Assetsus-gaap:
Period End2020-12-312019-12-312019-03-312018-12-312017-12-31
Value11161225917756654
Percentage of Assets21.922.017.415.113.4
Percentage of Assets21.922.017.415.113.4
Percentage of Assets gpi:UnitedKingdomSegment100.0100.0100.0100.0100.0

gpi:UnitedStatesSegment


Assetsus-gaap:
Period End2020-12-312019-12-312019-03-312018-12-312017-12-31
Value39424256421341134087
Percentage of Assets77.576.480.182.283.9
Percentage of Assets77.576.480.182.283.9
Percentage of Assets gpi:UnitedStatesSegment100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value485550655089498348595441557053295225526350014880488650584871473046444489446144214500453344144292430240984141396239763825381934093409342530232866279525992476219522472201
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value17541576144913561215117412551186116411271095114811721178112410119719689308868679129189691004959978985967105710351022990961860842845798807788813784720662
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.131.128.527.225.021.622.522.322.321.421.923.524.023.323.121.420.921.620.820.119.320.120.822.623.323.423.624.924.327.627.130.029.128.128.529.430.330.732.635.936.235.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value-9.2-2.3-32.5-39.1-40.1-35.2-4.1-10.8-5.4094.3528.936128.731-0.674
Percentage of StockholdersEquity-0.5-0.1-2.2-2.9-3.3-3.0-0.3-0.9-0.50.40.81.10.7-0.1
Percentage of Assets-0.2-0.0-0.6-0.8-0.8-0.6-0.1-0.2-0.10.10.20.30.2-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-31
Value-155.9-156.2-184.0-206.3-213.3-206.0-147.0-169.5-152.53-138.749-137.772-128.894-126.358-105.95-123.226-126.415-136.268-140.149-146.944-157.446-154.404-144.856-137.984-145.805-103.341-117.124-81.984-59.5-39.928-44.242-51.677-46.345-48.682-38.819-33.057-34.288-33.16-26.436-29.236-18.755-26.256-38.109
Percentage of StockholdersEquity-8.9-9.9-12.7-15.2-17.5-17.5-11.7-14.3-13.1-12.3-12.6-11.2-10.8-9.0-11.0-12.5-14.0-14.5-15.8-17.8-17.8-15.9-15.0-15.0-10.3-12.2-8.4-6.0-4.1-4.2-5.0-4.5-4.9-4.0-3.8-4.1-3.9-3.3-3.6-2.4-3.6-5.8
Percentage of Assets-3.2-3.1-3.6-4.1-4.4-3.8-2.6-3.2-2.9-2.6-2.8-2.6-2.6-2.1-2.5-2.7-2.9-3.1-3.3-3.6-3.4-3.2-3.1-3.4-2.4-2.9-2.0-1.5-1.0-1.2-1.4-1.4-1.4-1.1-1.1-1.2-1.2-1.0-1.2-0.90.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312011-09-302010-12-31
Value-146.7-153.9-151.6-167.2-173.2-170.8-142.9-158.7-147.121-143.101-146.708-144.7-138.867-114.681-122.552-137.613-118.532-7.533-7.852
Percentage of StockholdersEquity-8.4-9.8-10.5-12.3-14.2-14.5-11.4-13.4-12.6-12.7-13.4-12.6-11.8-9.7-10.9-14.8-12.9-1.0-1.0
Percentage of Assets-3.0-3.0-3.0-3.4-3.6-3.1-2.6-3.0-2.8-2.7-2.9-3.0-2.8-2.3-2.5-3.1-2.7-0.3-0.4
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value313305308304300287295291288287292290288286291288287285290287284283291288287283286286259368368369367363332334368330363368367363346351
Percentage of StockholdersEquity17.919.421.322.424.724.523.524.624.825.526.725.324.624.325.928.629.629.531.332.432.831.031.729.828.629.629.329.126.934.935.636.137.137.838.739.843.541.445.046.845.146.448.153.1
Percentage of Assets6.56.06.16.16.25.35.35.55.55.55.96.05.95.76.06.16.26.46.56.56.36.26.66.76.76.96.97.26.59.69.710.810.810.611.011.713.212.714.716.816.316.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value0.30.30.30.30.30.30.30.30.2550.2550.2550.2550.2550.2550.2550.2550.2560.2560.2570.2570.2570.2570.2570.2570.2580.2580.2570.2580.2580.2580.2570.2590.2590.2590.2580.260.2610.2610.260.2620.2620.2610.2620.261
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of 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
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value20991914181717231596156615421499146614221394136813391288124611411116108210531027996955926964924882852838816803776758729696677664636610591573554519471437
Percentage of StockholdersEquity119.7121.4125.4127.0131.3133.4122.8126.4126.0126.1127.3119.2114.2109.3110.9112.8114.9111.7113.2115.8114.9104.7100.999.592.192.087.185.184.476.075.074.173.772.578.878.875.276.573.272.768.166.365.566.0
Percentage of Assets43.237.835.734.632.928.827.728.128.127.027.928.027.425.525.624.124.024.123.623.222.221.121.022.521.521.520.621.220.521.020.322.221.420.322.423.222.823.523.926.124.723.60.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


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
Value-503.1-487.3-492.8-464.3-467.9-474.1-435.3-436.2-438.82-443.484-454.38-382.629-328.962-290.522-290.531-292.729-295.945-258.703-267.313-270.25-260.132-181.13-161.282-138.581-104.284-90.242-79.174-79.961-69.099-70.986-58.147-58.668-58.526-60.16-117.617-122.754-125.578-116.379-118.336-125.408-91.144-80.947-71.837-88.527
Percentage of StockholdersEquity-28.7-30.9-34.0-34.2-38.5-40.4-34.7-36.8-37.7-39.3-41.5-33.3-28.1-24.7-25.8-29.0-30.5-26.7-28.7-30.5-30.0-19.8-17.6-14.3-10.4-9.4-8.1-8.1-7.1-6.7-5.6-5.7-5.9-6.3-13.7-14.6-14.8-14.6-14.7-15.9-11.2-10.3-10.0-13.4
Percentage of Assets-10.4-9.6-9.7-9.3-9.6-8.7-7.8-8.2-8.4-8.4-9.1-7.8-6.7-5.7-6.0-6.2-6.4-5.8-6.0-6.1-5.8-4.0-3.7-3.2-2.4-2.2-1.9-2.0-1.7-1.9-1.5-1.7-1.7-1.8-3.9-4.3-4.5-4.5-4.8-5.7-4.1-3.70.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1689191120041916183423992516238623622433240222482271241323292232229321532150209822012254220220442099198220351929202419361967170717301739156614461385125111759379951019
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.837.739.438.537.844.145.244.845.246.248.046.146.547.747.847.249.448.048.247.548.949.749.947.648.848.449.148.750.950.651.550.150.850.851.850.549.648.147.542.744.346.3

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value1988287667219234137331532413328662633202224221321242640502117202610174.65389.54421141112441996321323
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.11.61.71.31.50.40.40.80.70.60.30.70.90.70.61.40.60.80.50.50.60.50.30.50.60.61.01.30.50.50.50.80.30.50.21.40.30.80.60.50.50.00.90.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value198828766721928444136183443342967272417
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.11.61.71.31.50.40.50.80.80.70.40.70.90.70.61.40.60.50.4

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1030132014681375132719921901179217931860184417331721180417631651180317291651168717841826173716341657154715561490151415371542135113581353119411071071966867719779777
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.226.128.827.627.336.634.133.634.335.436.935.535.235.736.234.938.838.537.038.239.640.339.438.138.537.837.637.638.140.240.439.639.839.539.538.638.337.235.032.834.735.3

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1919182221121526
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.50.40.20.30.5

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value441421405400380369359347335331321308301290277264259251244235228223212203196190187177171165178163160155143137117
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.98.77.57.27.17.16.86.96.96.86.46.36.46.36.25.95.95.65.45.35.35.25.24.95.04.84.94.75.04.95.25.45.65.65.55.55.3

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value160815921548154915471484142213701347135013481357131812691167115211251118108110631033978965944950859837827796716706699667649638604585550550506
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.631.931.928.527.827.927.226.027.027.727.626.827.126.825.125.725.225.324.023.523.422.822.423.022.921.721.121.620.821.020.720.422.122.722.923.323.625.124.523.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Property
Period End2020-12-312019-12-312018-12-31
Value232424
Percentage of PropertyPlantAndEquipmentNet1.51.61.8
Percentage of Assets0.50.40.5
Percentage of Assets gpi:BrazilSegment79.927.918.5

gpi:UnitedKingdomSegment


Property
Period End2020-12-312019-12-312018-12-31
Value281271199
Percentage of PropertyPlantAndEquipmentNet17.517.514.8
Percentage of Assets5.54.94.0
Percentage of Assets gpi:UnitedKingdomSegment25.222.126.3

gpi:UnitedStatesSegment


Property
Period End2020-12-312019-12-312018-12-31
Value130312511124
Percentage of PropertyPlantAndEquipmentNet81.080.983.4
Percentage of Assets25.622.522.5
Percentage of Assets gpi:UnitedStatesSegment33.129.427.3

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value101810199979939899991008979963965963968945960913914878877876880881886854912887847830824786747737689680681582564563546531526526507500
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.020.119.619.920.418.418.118.418.418.419.319.819.419.018.719.318.919.519.619.919.619.519.421.320.620.720.120.819.819.519.320.220.019.919.319.720.121.021.524.023.423.10.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

gpi:UnitedKingdomSegment


Goodwillus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-03-312018-12-312017-12-312016-12-31
Value96958986928589876557
Percentage of Goodwill9.49.69.08.79.18.89.39.17.16.5
Percentage of Assets1.91.91.81.81.71.61.71.81.31.3
Percentage of Assets gpi:UnitedKingdomSegment0.08.50.00.07.50.09.811.69.90.0

gpi:UnitedStatesSegment


Goodwillus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-03-312018-12-312017-12-312016-12-31
Value922901903903902879861861835805
Percentage of Goodwill90.690.491.091.389.589.889.289.491.591.9
Percentage of Assets18.217.718.118.616.216.516.417.217.118.1
Percentage of Assets gpi:UnitedStatesSegment0.022.90.00.021.20.020.420.920.40.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value232253260259276287295285294285285284310322319307303301279274285196170158
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.64.64.95.25.75.95.85.96.26.26.46.47.07.27.17.07.37.98.28.18.36.56.97.2

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:StatementBusinessSegments

gpi:UnitedKingdomSegment


Indefinite
Period End2020-12-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value193035352917
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill8.312.013.813.510.36.1
Percentage of Assets0.40.50.70.70.60.4
Percentage of Assets gpi:UnitedKingdomSegment1.72.53.94.64.50.0

gpi:UnitedStatesSegment


Indefinite
Period End2020-12-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value213223224224255260
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill91.788.086.286.489.691.5
Percentage of Assets4.24.04.34.55.35.8
Percentage of Assets gpi:UnitedStatesSegment5.45.25.35.56.30.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value213204209209219218220204202214
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.44.04.14.24.54.04.03.83.94.1

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Operating
Period End2020-12-312019-12-31
Value2.85.2
Percentage of OperatingLeaseRightOfUseAsset1.32.4
Percentage of Assets0.10.1
Percentage of Assets gpi:BrazilSegment9.45.9

gpi:UnitedKingdomSegment


Operating
Period End2020-12-312019-12-31
Value89100
Percentage of OperatingLeaseRightOfUseAsset42.745.5
Percentage of Assets1.81.8
Percentage of Assets gpi:UnitedKingdomSegment8.08.2

gpi:UnitedStatesSegment


Operating
Period End2020-12-312019-12-31
Value117114
Percentage of OperatingLeaseRightOfUseAsset55.952.2
Percentage of Assets2.32.1
Percentage of Assets gpi:UnitedStatesSegment3.02.7

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5153373026222421141827363331242018212312129.7271515191821131414161516201011121412138.6189.786
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.10.70.60.50.40.40.40.30.40.50.70.70.60.50.40.40.50.50.30.30.20.40.40.40.40.50.30.40.40.40.50.50.60.40.40.40.60.50.60.40.4

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value42443944240844241052748348550741942844249141243633034735635431332728029030425028829228328025420123725516716416614414812810992
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.78.78.78.29.17.59.59.19.39.68.48.89.19.78.59.27.17.78.08.07.07.26.46.87.16.17.07.47.17.36.75.97.07.55.55.85.95.56.05.94.94.2

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
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
Value267243226230199197206213198208197207189194177208173185176193182194185158161169172160142150140133144136128117117113109929583
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.54.84.54.64.13.63.74.03.84.03.94.23.93.83.64.43.74.14.04.44.04.34.23.73.74.14.24.03.63.93.73.94.24.04.24.14.24.34.44.24.23.8

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value127217121842181217752640242223972335243623862190211622672198213621262021205320262111210320391981201018171922180218131850186515841642166313951268127011221044801857894
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.233.836.236.436.548.543.545.044.746.347.744.943.344.845.145.245.845.046.045.846.946.446.246.246.744.346.445.545.648.448.846.548.248.546.244.345.443.242.236.538.140.6

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value22202121232424232323
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.40.40.50.40.40.40.40.5

Long Term Debt

us-gaap:LongTermDebt us-gaap:DebtInstrument

us-gaap:LongTermDebt

gpi:BrazilNote


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value111111162.02.12.42.5
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.30.00.00.00.0
Percentage of Assets gpi:BrazilNote0.00.00.00.00.00.00.00.0

gpi:U.K.Notes


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9077787565707373
Percentage of LongTermDebt798.2652.9717.3453.03290.03333.33075.02952.0
Percentage of Assets1.81.61.51.41.21.31.41.5
Percentage of Assets gpi:U.K.Notes0.00.00.00.00.00.00.00.0

gpi:U.S.Notes


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value526531366361315330326343
Percentage of LongTermDebt4660.24462.23327.32177.715755.015747.613620.813752.0
Percentage of Assets10.610.96.76.55.96.36.26.9
Percentage of Assets gpi:U.S.Notes0.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gpi:BrazilNote, gpi:OtherDebt


Long
Period End2021-06-302021-03-31
Value1211
Percentage of LongTermDebt0.00.0
Percentage of Assets0.30.2
Percentage of Assets gpi:BrazilNote gpi:OtherDebt0.00.0

gpi:BrazilNote, gpi:RealEstateRelatedandOtherLongTermDebt


Long
Period End2020-12-31
Value12
Percentage of LongTermDebt0.0
Percentage of Assets0.2
Percentage of Assets gpi:BrazilNote gpi:RealEstateRelatedandOtherLongTermDebt0.0

gpi:FMCCFacility, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value266995114129235204166177160
Percentage of LongTermDebt0.00.00.01015.01084.02140.01231.98335.08453.56427.4
Percentage of Assets0.61.41.92.32.74.33.73.13.43.2
Percentage of Assets gpi:FMCCFacility us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

gpi:FloorplanNotesPayable, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value18557674173266411251099116410981217
Percentage of LongTermDebt0.00.00.06479.65579.810228.26621.158240.052330.348710.6
Percentage of Assets3.811.414.614.713.720.719.721.921.024.4
Percentage of Assets gpi:FloorplanNotesPayable us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

gpi:FloorplanNotesPayableManufacturerAffiliates, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value274327327314357484459410426417
Percentage of LongTermDebt0.00.00.02785.83005.94408.22770.520525.020308.916713.0
Percentage of Assets5.66.56.46.37.48.98.37.78.28.4
Percentage of Assets gpi:FloorplanNotesPayableManufacturerAffiliates us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

gpi:FloorplanNotesPayableandOther, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value22461676777169611681144119911291258
Percentage of LongTermDebt0.00.00.06825.75853.810623.66894.059990.053803.750352.6
Percentage of Assets4.612.215.115.514.321.520.522.521.625.2
Percentage of Assets gpi:FloorplanNotesPayableandOther us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

gpi:OtherManufacturerAffiliateFacilities, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value247258232200228249255243248257
Percentage of LongTermDebt0.00.00.01770.81921.82268.21538.612190.011855.410285.5
Percentage of Assets5.15.14.64.04.74.64.64.64.85.1
Percentage of Assets gpi:OtherManufacturerAffiliateFacilities us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

gpi:OtherNonManufacturerAffiliateFacilities, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value39392639324345353041
Percentage of LongTermDebt0.00.00.0345.1273.9395.5272.91750.01473.41642.0
Percentage of Assets0.80.80.50.80.70.80.80.70.60.8
Percentage of Assets gpi:OtherNonManufacturerAffiliateFacilities us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

gpi:U.K.Notes, gpi:OtherDebt


Long
Period End2021-06-302021-03-31
Value9891
Percentage of LongTermDebt0.00.0
Percentage of Assets2.01.8
Percentage of Assets gpi:U.K.Notes gpi:OtherDebt0.00.0

gpi:U.K.Notes, gpi:RealEstateRelatedandOtherLongTermDebt


Long
Period End2020-12-31
Value92
Percentage of LongTermDebt0.0
Percentage of Assets1.8
Percentage of Assets gpi:U.K.Notes gpi:RealEstateRelatedandOtherLongTermDebt0.0

gpi:U.S.Notes, gpi:OtherDebt


Long
Period End2021-06-302021-03-31
Value513507
Percentage of LongTermDebt0.00.0
Percentage of Assets10.610.0
Percentage of Assets gpi:U.S.Notes gpi:OtherDebt0.00.0

gpi:U.S.Notes, gpi:RealEstateRelatedandOtherLongTermDebt


Long
Period End2020-12-31
Value514
Percentage of LongTermDebt0.0
Percentage of Assets10.1
Percentage of Assets gpi:U.S.Notes gpi:RealEstateRelatedandOtherLongTermDebt0.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

gpi:RealEstateRelatedandOtherLongTermDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value619453343350321
Percentage of LongTermDebt0.02730.713752.00.00.0
Percentage of Assets12.28.16.97.27.2
Percentage of Assets gpi:RealEstateRelatedandOtherLongTermDebt0.00.00.00.00.0

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value132212821294130713601137143213081295126212811304135713761318129212631224121212321250125612031084104110771008938938665663560541549555546516494482473453412
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.225.325.426.228.020.925.724.524.824.025.626.727.827.227.127.327.227.327.227.927.827.727.325.324.226.324.423.723.617.417.416.415.916.018.419.018.519.019.521.620.218.8

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value156158141135135135145131134136134124
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.12.82.72.82.52.62.52.62.62.72.6

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1431341131141091021031101029310099999897938987838180787169696765645549474644444241403836333331
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.02.72.22.32.21.91.92.12.01.82.02.02.01.92.02.01.92.01.91.81.81.71.61.61.61.71.61.61.41.31.31.41.31.31.41.41.51.51.51.51.51.4

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value208200207207214208210195193204
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.04.14.24.43.83.83.73.73.9

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value33
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.7

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value31
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value26
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value24
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value182
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets3.6

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value229235219216228
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets4.54.24.14.24.3

us-gaap:OperatingLeaseLiability us-gaap:LossContingenciesByNatureOfContingency

us-gaap:PropertyLeaseGuarantee


Operating
Period End2020-09-30
Value29
Percentage of OperatingLeaseLiability0.0
Percentage of Assets0.6
Percentage of Assets us-gaap:PropertyLeaseGuarantee0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value330
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets6.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value101
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets2.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value17541576144913561215117412551186116411271095114811721178112410119719689308868679129189691004959978985967105710351022990961860842845798807788813784720662
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.131.128.527.225.021.622.522.322.321.421.923.524.023.323.121.420.921.620.820.119.320.120.822.623.323.423.624.924.327.627.130.029.128.128.529.430.330.732.635.936.235.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value-9.2-2.3-32.5-39.1-40.1-35.2-4.1-10.8-5.4094.3528.936128.731-0.674
Percentage of StockholdersEquity-0.5-0.1-2.2-2.9-3.3-3.0-0.3-0.9-0.50.40.81.10.7-0.1
Percentage of Assets-0.2-0.0-0.6-0.8-0.8-0.6-0.1-0.2-0.10.10.20.30.2-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-31
Value-155.9-156.2-184.0-206.3-213.3-206.0-147.0-169.5-152.53-138.749-137.772-128.894-126.358-105.95-123.226-126.415-136.268-140.149-146.944-157.446-154.404-144.856-137.984-145.805-103.341-117.124-81.984-59.5-39.928-44.242-51.677-46.345-48.682-38.819-33.057-34.288-33.16-26.436-29.236-18.755-26.256-38.109
Percentage of StockholdersEquity-8.9-9.9-12.7-15.2-17.5-17.5-11.7-14.3-13.1-12.3-12.6-11.2-10.8-9.0-11.0-12.5-14.0-14.5-15.8-17.8-17.8-15.9-15.0-15.0-10.3-12.2-8.4-6.0-4.1-4.2-5.0-4.5-4.9-4.0-3.8-4.1-3.9-3.3-3.6-2.4-3.6-5.8
Percentage of Assets-3.2-3.1-3.6-4.1-4.4-3.8-2.6-3.2-2.9-2.6-2.8-2.6-2.6-2.1-2.5-2.7-2.9-3.1-3.3-3.6-3.4-3.2-3.1-3.4-2.4-2.9-2.0-1.5-1.0-1.2-1.4-1.4-1.4-1.1-1.1-1.2-1.2-1.0-1.2-0.90.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312011-09-302010-12-31
Value-146.7-153.9-151.6-167.2-173.2-170.8-142.9-158.7-147.121-143.101-146.708-144.7-138.867-114.681-122.552-137.613-118.532-7.533-7.852
Percentage of StockholdersEquity-8.4-9.8-10.5-12.3-14.2-14.5-11.4-13.4-12.6-12.7-13.4-12.6-11.8-9.7-10.9-14.8-12.9-1.0-1.0
Percentage of Assets-3.0-3.0-3.0-3.4-3.6-3.1-2.6-3.0-2.8-2.7-2.9-3.0-2.8-2.3-2.5-3.1-2.7-0.3-0.4
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value313305308304300287295291288287292290288286291288287285290287284283291288287283286286259368368369367363332334368330363368367363346351
Percentage of StockholdersEquity17.919.421.322.424.724.523.524.624.825.526.725.324.624.325.928.629.629.531.332.432.831.031.729.828.629.629.329.126.934.935.636.137.137.838.739.843.541.445.046.845.146.448.153.1
Percentage of Assets6.56.06.16.16.25.35.35.55.55.55.96.05.95.76.06.16.26.46.56.56.36.26.66.76.76.96.97.26.59.69.710.810.810.611.011.713.212.714.716.816.316.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value0.30.30.30.30.30.30.30.30.2550.2550.2550.2550.2550.2550.2550.2550.2560.2560.2570.2570.2570.2570.2570.2570.2580.2580.2570.2580.2580.2580.2570.2590.2590.2590.2580.260.2610.2610.260.2620.2620.2610.2620.261
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of 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
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value20991914181717231596156615421499146614221394136813391288124611411116108210531027996955926964924882852838816803776758729696677664636610591573554519471437
Percentage of StockholdersEquity119.7121.4125.4127.0131.3133.4122.8126.4126.0126.1127.3119.2114.2109.3110.9112.8114.9111.7113.2115.8114.9104.7100.999.592.192.087.185.184.476.075.074.173.772.578.878.875.276.573.272.768.166.365.566.0
Percentage of Assets43.237.835.734.632.928.827.728.128.127.027.928.027.425.525.624.124.024.123.623.222.221.121.022.521.521.520.621.220.521.020.322.221.420.322.423.222.823.523.926.124.723.60.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


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
Value-503.1-487.3-492.8-464.3-467.9-474.1-435.3-436.2-438.82-443.484-454.38-382.629-328.962-290.522-290.531-292.729-295.945-258.703-267.313-270.25-260.132-181.13-161.282-138.581-104.284-90.242-79.174-79.961-69.099-70.986-58.147-58.668-58.526-60.16-117.617-122.754-125.578-116.379-118.336-125.408-91.144-80.947-71.837-88.527
Percentage of StockholdersEquity-28.7-30.9-34.0-34.2-38.5-40.4-34.7-36.8-37.7-39.3-41.5-33.3-28.1-24.7-25.8-29.0-30.5-26.7-28.7-30.5-30.0-19.8-17.6-14.3-10.4-9.4-8.1-8.1-7.1-6.7-5.6-5.7-5.9-6.3-13.7-14.6-14.8-14.6-14.7-15.9-11.2-10.3-10.0-13.4
Percentage of Assets-10.4-9.6-9.7-9.3-9.6-8.7-7.8-8.2-8.4-8.4-9.1-7.8-6.7-5.7-6.0-6.2-6.4-5.8-6.0-6.1-5.8-4.0-3.7-3.2-2.4-2.2-1.9-2.0-1.7-1.9-1.5-1.7-1.7-1.8-3.9-4.3-4.5-4.5-4.8-5.7-4.1-3.70.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0255000.0255000.0255000.0255000.0255000.0255000.0255000.0255000.0256000.0256000.0257000.0257000.0257000.0257000.0257000.0257000.0258000.0258000.0257000.0258000.0258000.0258000.0257000.0259000.0259000.0259000.0258000.0260000.0261000.0261000.0260000.0262000.0262000.0261000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value313305308304300287295291288287292290288286291288287285290287284283291288287283286286259368368369367363332334368330363368367363
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.56.06.16.16.25.35.35.55.55.55.96.05.95.76.06.16.26.46.56.56.36.26.66.76.76.96.97.26.59.69.710.810.810.611.011.713.212.714.716.816.316.5

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value20991914181717231596156615421499146614221394136813391288124611411116108210531027996955926964924882852838816803776758729696677664636610591573554519
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.237.835.734.632.928.827.728.128.127.027.928.027.425.525.624.124.024.123.623.222.221.121.022.521.521.520.621.220.521.020.322.221.420.322.423.222.823.523.926.124.723.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value-155900000.0-156200000.0-184000000.0-206300000.0-213300000.0-206000000.0-147000000.0-169500000.0-152530000.0-138750000.0-137770000.0-128890000.0-126360000.0-105950000.0-123230000.0-126420000.0-136270000.0-140150000.0-146940000.0-157450000.0-154400000.0-144860000.0-137980000.0-145800000.0-103340000.0-117120000.0-81984000.0-59500000.0-39928000.0-44242000.0-51677000.0-46345000.0-48682000.0-38819000.0-33057000.0-34288000.0-33160000.0-26436000.0-29236000.0-27986000.0-17155000.0-15618000.0-18755000.0-26256000.0-38109000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-3.2-3.1-3.6-4.1-4.4-3.8-2.6-3.2-2.9-2.6-2.8-2.6-2.6-2.1-2.5-2.7-2.9-3.1-3.3-3.6-3.4-3.2-3.1-3.4-2.4-2.9-2.0-1.5-1.0-1.2-1.4-1.4-1.4-1.1-1.1-1.2-1.2-1.0-1.2-1.3-0.80.0-0.90.00.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
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
Value5034874924644674744354364384434543823282902902922952582672702601811611381049079796970585858601171221251161181259180
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.49.69.79.39.68.77.88.28.48.49.17.86.75.76.06.26.45.86.06.15.84.03.73.22.42.21.92.01.71.91.51.71.71.83.94.34.54.54.85.74.13.7

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value6.86.45.2999999999999965.3165.14.44.43.916.0674.4624.34.2355.6294.2824.1354.3756.0636.0774.6374.6125.4444.9875.0895.994.8734.1273.9754.2143.6473.4153.4993.5443.3912.9763.0013.0212.8822.5752.775
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value6.86.45.2999999999999965.3165.14.44.43.916.0674.4624.34.2355.6294.2824.1354.3756.0636.0774.6374.6125.4444.9875.0895.994.8734.1273.9754.2143.6473.4153.4993.5443.3912.9763.0013.0212.8822.5752.775
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5122399224644446057125127-87.43794114148-110.942255-16.87671-1.75521356116-89.8211502258-73.548140-2.259133-76.594412561-68.03138-36.271-9.45-101.80210014554-16.2813.866
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.98.03.10.830.21.61.91.94.24.6-3.03.33.95.2-3.88.5-0.62.8-0.17.62.04.5-3.45.40.82.4-2.95.4-0.15.9-3.41.81.13.2-3.51.9-1.9-0.6-6.36.49.93.9-1.10.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-17.1-76.74.1-17.6-30.1-31.1-98.1-121.895-64.819-6.786-22.529-57.64528-116.367-65.865-126.929-77.924-41.88-17.017-49.153-36.823-71.047-9.642-109.224-93.795-71.841-79.417-73.271-113.278-81.085-202.068-8.0061.688-60.268-43.124-28.551-80.274-72.509-63.975-21.322-81.485-45.991-39.803-5.886
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-2.50.1-0.6-1.4-1.2-3.2-3.9-2.2-0.2-0.8-2.01.0-4.1-2.3-4.2-2.9-1.7-0.6-1.7-1.3-2.7-0.4-3.9-3.4-3.0-3.1-2.8-4.5-3.6-8.9-0.30.1-3.1-2.2-1.4-4.2-4.4-3.9-1.4-5.5-3.3-2.8-0.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-381.5-165.6-77.7-11.4-560.5-18.52367-55.269-102.49994-45.776-130.932-27.534139-88.69387-17.16317-166.728-18.8-36.52590-39.692671.961144-36.625105-42.381274-16.558-33.49411772010588169-80.239-96.93116-20.10765
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.3-5.5-2.6-0.4-26.3-0.70.72.2-1.8-3.63.3-1.6-4.4-1.04.8-2.93.3-0.70.6-5.9-0.7-1.43.4-1.42.50.15.7-1.44.2-1.912.0-0.7-1.40.64.01.05.65.310.4-5.1-6.61.2-1.44.5

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value115-4.321-6.553-8.9-16.63.084.68518-15.671-9.2419.0734.928-37.87340
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.1-0.10.7-0.22.5-0.3-0.50.10.20.6-0.5-0.30.30.2-1.31.3

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1.55.91.90.2-2.6-0.412-1.5381.054.088-0.614-1.5032.9162.675-62.1655.0075.5925.503-0.1856.3632.9845.0-1.2515.0354.783.325.825-2.4165.9972.9135.8117.3130.1619.1272.5274.683.0123.0638.5442.177.0627.0481.0510
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value18191919181818181716171616161515141313121212111111111010109.9259.4369.0938.8848.4138.468.0967.7427.2367.1826.8456.5816.455
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5122399224644446057125127-87.43794114148-110.942255-16.87671-1.75521356116-89.8211502258-73.548140-2.259133-76.594412561-68.03138-36.271-9.45-101.80210014554-16.2813.866
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.98.03.10.830.21.61.91.94.24.6-3.03.33.95.2-3.88.5-0.62.8-0.17.62.04.5-3.45.40.82.4-2.95.4-0.15.9-3.41.81.13.2-3.51.9-1.9-0.6-6.36.49.93.9-1.10.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1911011001263029483849383034563511029393330354634-33.38645463518261631213237221731282320212415101812
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.23.43.34.21.41.11.51.21.61.41.11.21.91.33.81.01.51.31.21.31.71.3-1.21.61.71.50.71.00.71.41.01.41.61.10.91.61.51.41.31.41.71.10.71.30.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302020-06-302020-03-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value19130291863830345635110293933303546344546353128232021
Percentage of NetIncomeLoss100.0100.0100.0490.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.21.41.16.01.41.11.21.91.33.81.01.51.31.21.31.71.31.61.71.51.61.51.41.31.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value6.86.45.2999999999999965.3165.14.44.3973.9036.14.54.44.35.6424.2944.14.46.0746.1944.6584.6585.5114.6844.74.5647326500000014.8884.1414.04.23.663.4263.53.63.4032.9883.03.02.8942.5862.82.82.7442.4372.329
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-17.1-76.74.1-17.6-30.1-31.1-98.1-121.895-64.819-6.786-22.529-57.64528-116.367-65.865-126.929-77.924-41.88-17.017-49.153-36.823-71.047-9.642-109.224-93.795-71.841-79.417-73.271-113.278-81.085-202.068-8.0061.688-60.268-43.124-28.551-80.274-72.509-63.975-21.322-81.485-45.991-39.803-5.886
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-2.50.1-0.6-1.4-1.2-3.2-3.9-2.2-0.2-0.8-2.01.0-4.1-2.3-4.2-2.9-1.7-0.6-1.7-1.3-2.7-0.4-3.9-3.4-3.0-3.1-2.8-4.5-3.6-8.9-0.30.1-3.1-2.2-1.4-4.2-4.4-3.9-1.4-5.5-3.3-2.8-0.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value263724182831523067412229404771772046305536334129252359224127381627192029201715218.16615469.023
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-381.5-165.6-77.7-11.4-560.5-18.52367-55.269-102.49994-45.776-130.932-27.534139-88.69387-17.16317-166.728-18.8-36.52590-39.692671.961144-36.625105-42.381274-16.558-33.49411772010588169-80.239-96.93116-20.10765
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.3-5.5-2.6-0.4-26.3-0.70.72.2-1.8-3.63.3-1.6-4.4-1.04.8-2.93.3-0.70.6-5.9-0.7-1.43.4-1.42.50.15.7-1.44.2-1.912.0-0.7-1.40.64.01.05.65.310.4-5.1-6.61.2-1.44.5

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value6.15.65.50.00.05.55.55.1094.854.8414.8585.1785.3415.4955.2455.0215.055.154.9334.934.9765.1485.1615.0444.8454.8924.8064.0564.124.1154.1294.1513.8983.6273.4043.423.4293.182.9493.0142.6292.619
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value310.00.0481.40.00.00.07557429.1990.01.069390.00.012833130331616190.0050.0163.5530.0-0.3920.3920.02.8219.116-0.625.865300.07.522
Percentage of PaymentsForRepurchaseOfCommonStock100.00.00.0100.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-01-012017-12-312016-12-312015-12-312014-12-312011-12-312010-12-31
Value1321411311371381271191591351275130
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value1271074551706458697671
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value2000000.02400000.01598000.01300000.01000000.01200000.000000000000000000
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6069525453464028
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0

gpi:BorrowingsOnCreditFacilityAcquisitionLine

gpi:BorrowingsOnCreditFacilityAcquisitionLine


Borrowings
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.0254308810616107660.031660.0012032150.07011040-95.095238156189742257019600.00.00.0
Percentage of BorrowingsOnCreditFacilityAcquisitionLine0.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

gpi:BorrowingsOnCreditFacilityFloorplanLine

gpi:BorrowingsOnCreditFacilityFloorplanLine


Borrowings
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
Value18962310240746441254169119932004167416311847178316671656196516841775159415561667172416482027197819531597178423112231150316711587157515451513138914401357119011921205123712631383
Percentage of BorrowingsOnCreditFacilityFloorplanLine100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:DilutiveEffectOfRestrictedStockAndEmployeeStockPurchasesNetOfAssumedRepurchaseOfTreasuryStock

gpi:DilutiveEffectOfRestrictedStockAndEmployeeStockPurchasesNetOfAssumedRepurchaseOfTreasuryStock


Dilutive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value81952.066396.03993.058661.040166.044810.0901.017145.022000.052000.0-1000.08000.010000.09000.003000.06000.06000.0010000.013000.05000.005000.03000.03000.01000.05000.07000.04000.0-1000.07000.05000.06000.0-1000.08000.08000.06000.02000.08000.03000.03000.0
Percentage of DilutiveEffectOfRestrictedStockAndEmployeeStockPurchasesNetOfAssumedRepurchaseOfTreasuryStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:FloorPlanInterestExpense

gpi:FloorPlanInterestExpense


Floor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-06-30
Value8.87.68.48.1101214151515161414141313131111111111109.685109.3489.9191010101010109.3648.3727.9427.8637.6197.4426.9646.5218.633
Percentage of FloorPlanInterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:GoodwillAdjustmentsandAcquiredDuringPeriod

gpi:GoodwillAdjustmentsandAcquiredDuringPeriod


Goodwill
Period End2021-03-312020-09-30
Value220.0
Percentage of GoodwillAdjustmentsandAcquiredDuringPeriod100.00.0

gpi:GoodwillAdjustmentsandAcquiredDuringPeriod us-gaap:StatementBusinessSegments

gpi:UnitedStatesSegment


Goodwill
Period End2021-03-312020-09-30
Value220.0
Percentage of GoodwillAdjustmentsandAcquiredDuringPeriod100.00.0

gpi:IncreaseDecreaseFloorPlanNotes

gpi:IncreaseDecreaseFloorPlanNotes


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value560.5-5.70000000000001547126-35.9-40.09.939-11.3072.468-24.483-17.4588.602-5.0673.13
Percentage of IncreaseDecreaseFloorPlanNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:IncreaseDecreaseInContractsInTransitAndVehicleReceivables

gpi:IncreaseDecreaseInContractsInTransitAndVehicleReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-32.843-10.54458-135.2-4.64.328-7.311-5.11730-13.486-45.488-11.237-48.757682.735-56.1465-4.9145.595-50.26247-26.2277.244-10.48744-18.8751.816-16.7864-26.073-5.146-14.06554-1.264-5.825-18.04667-5.398-11.753.62321-18.893
Percentage of IncreaseDecreaseInContractsInTransitAndVehicleReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:IncreaseDecreaseInOperatingLeaseLiability

gpi:IncreaseDecreaseInOperatingLeaseLiability


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value6.66.02.56.57.3-12.96.7516.1358.4140.00.00.0
Percentage of IncreaseDecreaseInOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

gpi:IncreaseDecreaseinCapitalExpendituresAccrued

gpi:IncreaseDecreaseinCapitalExpendituresAccrued


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2400000.0-2700000.0-1700000.02000000.0700000.07700000.0-100000.0
Percentage of IncreaseDecreaseinCapitalExpendituresAccrued100.0100.0100.0100.0100.0100.0100.0

gpi:NetGainLossOnRealEstateAndDealershipTransactions us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementBusinessSegments

gpi:NetGainLossOnRealEstateAndDealershipTransactions

gpi:Dealership, gpi:UnitedStatesSegment


Net
Period End2021-06-302021-03-31
Value800000.0900000.0
Percentage of NetGainLossOnRealEstateAndDealershipTransactions100.0100.0

gpi:NetGainLossOnRealEstateAndDealershipTransactions us-gaap:StatementBusinessSegments

gpi:UnitedKingdomSegment


Net
Period End2021-06-302021-03-31
Value-1200000.0600000.0
Percentage of NetGainLossOnRealEstateAndDealershipTransactions-150.066.7

gpi:UnitedStatesSegment


Net
Period End2021-06-302021-03-31
Value800000.01000000.0
Percentage of NetGainLossOnRealEstateAndDealershipTransactions100.0111.1

gpi:NetIssuanceofCommonandTreasurySharestoEmployeeStockCompensationPlans

gpi:NetIssuanceofCommonandTreasurySharestoEmployeeStockCompensationPlans


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3500000.02600000.02500000.02000000.02500000.05800000.01795000.01835000.0-830000.01188000.01518000.01649000.0-1638000.0407000.01709000.03517000.0-1030000.02416000.01316000.01379000.0-1243000.01003000.0324000.0-3254000.02141000.0-135000.0-130000.0
Percentage of NetIssuanceofCommonandTreasurySharestoEmployeeStockCompensationPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:OperatingLeaseRightofUseAssetAmortization

gpi:OperatingLeaseRightofUseAssetAmortization


Operating
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5.95.26.56.4-13.66.7966.787.6240.00.00.0
Percentage of OperatingLeaseRightofUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

gpi:OtherComprehensiveIncomeLossReclassificationOfCashFlowHedgeGainLossAfterReclassificationAndTax

gpi:OtherComprehensiveIncomeLossReclassificationOfCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-30
Value2400000.0
Percentage of OtherComprehensiveIncomeLossReclassificationOfCashFlowHedgeGainLossAfterReclassificationAndTax100.0

gpi:ProceedsFromDispositionOfFranchisePropertyAndEquipment

gpi:ProceedsFromDispositionOfFranchisePropertyAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9.410280.70.10.50.35.1622.813350.1731722.945.5752.5510.3752.207139.0870.11413312.3456.1681.1715.7971299.5670.1970.365236017380.0440.0740.1390.2710.5940.9394.2355.1782.745
Percentage of ProceedsFromDispositionOfFranchisePropertyAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:RepaymentsOnCreditFacilityAcquisitionLine

gpi:RepaymentsOnCreditFacilityAcquisitionLine


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value13811853070936.468111676.56618666.702200.0150.08010040411911881354.692244100300.00.00.00.0
Percentage of RepaymentsOnCreditFacilityAcquisitionLine100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

gpi:RepaymentsOnCreditFacilityFloorplanLine

gpi:RepaymentsOnCreditFacilityFloorplanLine


Repayments
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
Value22892461241345791715166520581938172716971684172317591702184918201690159815281821165916662025201218251641171623242250151115011609158214601439139113451277101712581283121713011316
Percentage of RepaymentsOnCreditFacilityFloorplanLine100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:RightofUseAssetObtainedinExchangeforFinanceLeaseLiabilityModificationsandRemeasurements

gpi:RightofUseAssetObtainedinExchangeforFinanceLeaseLiabilityModificationsandRemeasurements


Rightof
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0330.0-1.50.0-0.100000000000000948.30.0
Percentage of RightofUseAssetObtainedinExchangeforFinanceLeaseLiabilityModificationsandRemeasurements0.0100.00.0100.00.0100.0100.00.0

gpi:RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityModificationsandRemeasurements

gpi:RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityModificationsandRemeasurements


Rightof
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.3-0.3-8.16.2110.41.2-11.40.7
Percentage of RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityModificationsandRemeasurements100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet

gpi:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.0-3.51.72.21.8-2.51.31.91.8-0.8
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.1-9.0-1.0-1.4-4.4-12.7-1.0-0.7-2.8-11.7
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet27.5257.1-58.8-63.6-244.4508.0-76.9-36.8-155.61462.5

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.95.52.73.66.2102.42.64.710
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlanNet72.5-157.1158.8163.6344.4-408.0184.6136.8261.1-1362.5

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.60.60.60.70.91.00.91.0371.1170.9460.9460.9490.8760.650.8091.0030.9370.9120.9110.6981.6010.4840.9250.9150.9130.8990.8982.4263.6233.6123.4353.6263.4413.3863.3313.2713.2183.173.1193.0232.972.8783.9862.379
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value130.02311100.53716234.2680.010.09.5260.00.020101.0240.932850.9161.0390.0309.3731.7215.3680.5650.6090.06.9880.00.1870.1010.7973.6440.1420.2227.7191.6391.482
Percentage of AssetImpairmentCharges100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Asset
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.00.0110.00.00.5
Percentage of AssetImpairmentCharges0.00.046.60.00.093.1

gpi:UnitedKingdomSegment


Asset
Period End2020-12-312020-09-302020-06-302019-12-312019-09-30
Value0.00.0120.07.0
Percentage of AssetImpairmentCharges0.00.053.80.068.0

gpi:UnitedStatesSegment


Asset
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-30
Value0.02.2113.31523
Percentage of AssetImpairmentCharges0.00.099.132.097.0100.2

us-gaap:BusinessCombinationConsiderationTransferred1

us-gaap:BusinessCombinationConsiderationTransferred1


Business
Period End2021-03-312019-12-312018-12-312017-12-312016-12-31
Value49460.00.1-61.2
Percentage of BusinessCombinationConsiderationTransferred1100.0100.00.0100.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:StatementScenario, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType

srt:ScenarioForecast, gpi:UnitedKingdomSegment, us-gaap:SubsequentEvent


Business
Period End2021-07-31
Value36
Percentage of BusinessCombinationConsiderationTransferred10.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.330.310.30.3-0.280.280.26260.00.260.260.256140.260.250.240.240.240.230.230.230.220.220.210.20.20.190.170.170.170.170.170.160.150.150.150.150.140.130.130.110.11
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod us-gaap:ProductOrService

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod

us-gaap:FinancialService


Contract
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value7.76.07.65.44.02.69.03.26.82.2
Percentage of ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLossOnDerivative us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments

us-gaap:DerivativeLossOnDerivative

us-gaap:InterestRateSwap, gpi:UnitedStatesSegment


Derivative
Period End2021-06-30
Value2300000.0
Percentage of DerivativeLossOnDerivative100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
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
Value6.05.65.50.00.05.55.55.24.8384.8284.8475.25.335.4825.2325.015.0395.1394.924.9174.9625.1345.1485.0314.8314.8774.7944.0444.1084.1024.1184.1363.8853.616-23.3723.3933.4293.1682.93813
Percentage of DividendsCommonStockCash100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
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
Value6.05.65.50.00.05.55.55.24.8384.8284.8475.25.335.4825.2325.015.0395.1394.924.9174.9625.1345.1485.0314.8314.8774.7944.0444.1084.1024.1184.1363.8853.6163.3923.3933.4293.1682.93813
Percentage of DividendsCommonStockCash100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-14.5100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1500000.0-1300000.02000000.0-2000000.00-3400000.0-1600000.0-545000.0-236000.0-519000.0-404000.0-129000.0-2859000.047000.0-875000.0750000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnDispositionOfAssets1


Gain
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1.01.10.00.00.0-0.0850.2075.778-0.1456.278200.516-1.6290.5340.0340.280.8631.1950.0270.598.25-0.0381.515-0.008-1.36916
Percentage of GainLossOnDispositionOfAssets1100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossRelatedToLitigationSettlement

us-gaap:GainLossRelatedToLitigationSettlement


Gain
Period End2021-03-312018-09-302018-06-30
Value1.03.10.5
Percentage of GainLossRelatedToLitigationSettlement100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-03-312020-12-312020-09-302019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value800000.0-5200000.0-3800000.06600000.01924000.0-1412000.0-1822000.0-7924000.02929000.0-207000.02547000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Goodwill
Period End2020-12-312020-09-302019-12-312019-03-31
Value-6200000.00400000.0-166000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss119.2-0.06.1-8.6

gpi:UnitedKingdomSegment


Goodwill
Period End2021-03-312020-12-312020-09-302019-12-312019-03-31
Value800000.01000000.0-3800000.06200000.02090000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0-19.2100.093.9108.6

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit


Goodwill
Period End2021-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.43.388-0.0080.00.00.00.9330.741.0930.02.226
Percentage of GoodwillWrittenOffRelatedToSaleOfBusinessUnit100.0100.0100.00.00.00.0100.0100.0100.00.0100.0

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit us-gaap:StatementBusinessSegments

gpi:UnitedStatesSegment


Goodwill
Period End2021-03-31
Value1.4
Percentage of GoodwillWrittenOffRelatedToSaleOfBusinessUnit100.0

us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill

gpi:UnitedStatesSegment


Impairment
Period End2020-12-312019-12-312019-09-30
Value9.7103.0
Percentage of ImpairmentOfIntangibleAssetsExcludingGoodwill100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-12.18.44.039-23.2-41.60.9364.555-9.15525-7.246-8.458-12.727-19.566227.926-21.508198.1942.24-10.804118.224.876-6.275131.7379.647-4.82212-5.934.953-1.83813-21.421-7.139210.0553.315-7.2789.097-1.572
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value101812-10.850-98.12421-24.271101-17.0349.36-39.07965-49.587113-37.6449.164-2.77963-16.70732-5.75-0.33941-10.329-17.56724-16.1724650-55.78-6.98653101.6719.7857.838371414106.506-6.075
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-900000.0-100000.0-100000.0-100000.0-100000.0-200000.0-100000.0-98000.0-124000.0-178000.0-23000.0-46000.0-77000.0-655000.042000.0718000.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-0.77.9-15.8-45.96.6-1.833-6.0-1.17217-6.14512-2.70612-9.186-0.085.787-3.419.713-2.384-11.097-4.4764.6541.926-0.838-2.58918-12.2652.039-2.697-0.8951.071-0.353-1.7644.127-0.36-1.763-4.4527.7924.4760.375-1.3970.138-5.266
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInRetailRelatedInventories

us-gaap:IncreaseDecreaseInRetailRelatedInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-295.1-149.38337-662.412570-10.012-59.7462811413-40.119-7.15324-210.6196774-18.48-82.919-33.65755118-20.284871.46951-54.86213-38.269133-3.895278485337584119-58.901-47.067-5.7362158
Percentage of IncreaseDecreaseInRetailRelatedInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseOther

us-gaap:InterestExpenseOther


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value131313141618191817181819191818171716171716161413141313131210109.9719.579.2429.6169.6199.199.048.9118.6448.2257.942
Percentage of InterestExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent


Oci
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
Value-8.334214.6-11.0-69.223-18.843-16.41-1.947-11.7-2.36-19.69518
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-15.4375.8-1.5-8.5-41.37.8-7.256-12.39-5.5544.49110
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent185.5106.627.1-32.677.359.732.938.575.5285.3-22.856.9

us-gaap:AccumulatedTranslationAdjustment


Oci
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
Value7.2-2.3156.0-2.5-27.915-11.587-4.023.607-2.0-5.885-24.1867.871
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent-86.7-6.673.4130.422.740.367.161.524.5-185.317.1249.4122.843.1

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-4300000.09400000.02100000.0300000.0-1500000.0-9700000.01900000.0-1747000.0-2937000.0-1316000.0-2316000.0846000.01078000.02492000.02062000.0-154000.0-1542000.0234000.0713000.0-3373000.0-6685000.010569000.01082000.0-3907000.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-4300000.09400000.02100000.0300000.0-1500000.0-9700000.01900000.0-1747000.0-2937000.0-1316000.01078000.02492000.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax


Other
Period End2021-06-30
Value700000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-11.1273.7-1.8-7.0-31.65.9-5.6-9.454-4.23.414
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.4-9.4-24.00.61.59.71.7-1.7-2.9371.3
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-312018-06-30
Value-1900000.02400000.0-2100000.0-500000.0307000.0346000.0-1062000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:IncomeStatementLocation

gpi:FloorplanInterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1400000.0-2200000.0-2600000.0-2600000.0-2100000.0-600000.0-800000.0-218000.0274000.0344000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax73.7-91.70.00.0100.0120.00.00.089.399.4

gpi:OtherInterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000000.0-900000.0-1100000.0-1000000.0-700000.0-100000.0-200000.061000.0129000.0110000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax52.6-37.50.00.033.320.00.00.042.031.8

us-gaap:InterestExpense


Other
Period End2020-12-312020-09-302019-12-312019-09-30
Value-2800000.0-2700000.0-800000.0-100000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.00.00.00.0

us-gaap:SellingGeneralAndAdministrativeExpenses


Other
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302018-06-30
Value0-100000.0100000.0-100000.00698000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.00.00.00.00.0-65.7

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value600000.0700000.0700000.0200000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax us-gaap:IncomeStatementLocation

us-gaap:InterestExpense


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-900000.0-800000.0-700000.0-200000.0-300000.00-95000.0100000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax0.00.0-100.0-100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.327227.0-7.3-59.022-17.0-13.781-0.977-8.878-2.3-20.408173.1899.8533.8816.79510-3.042-9.548-6.8727.821-42.46413-35.14-22.484-19.5724.3147.435-5.3322.337-9.863-5.7621.231-1.128-6.7242.8-1.25-10.831-1.5373.137
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-6.9306.61.0-4.9-31.16.7-5.355-9.761-4.5843.7789.405
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-2300.0108.229.714.367.152.729.831.570.8469.2-18.554.4

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.327227.0-7.3-59.022-17.0-13.781-0.977-8.878-2.3-20.408173.1899.8533.8816.79510-3.042-9.548-6.8727.821-42.46413-35.14-22.484-19.5724.3147.435-5.3322.337-9.863-5.7621.231-1.128-6.7242.8
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-06-302013-03-312012-06-302012-03-31
Value7.2-2.3156.0-2.5-27.915-11.587-4.023.607-1.956-5.885-24.1867.871-19.268-7.456-1.41.394
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent2400.0-8.270.785.734.247.370.768.229.2-369.222.0255.9118.545.6195.4129.420.849.8

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


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-800000.0500000.0-300000.0-200000.0-1300000.0-400000.0-400000.0-197000.0-269000.0-234000.0-307000.0-524000.0-71000.06000.0-955000.0-128000.0-195000.0871000.056000.0-392000.0167000.0-666000.0101000.0-1157000.0-549000.0-1729000.0-2639000.0-901000.0-602000.0-544000.0-1364000.0-1281000.0-216000.0-804000.0-2356000.0-845000.0-344000.0-420000.0-2119000.0-267000.0-217000.0-152000.0-1547000.0-536000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-30
Value07800000.01100000.0100000.02200000.0144000.0788000.000660000.000
Percentage of PaymentsOfDebtIssuanceCosts0.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value500000.07000000.0700000.0400000.0100000.05000000.0800000.0300000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.0490.00.046970.00.00.001603.36671-0.0011080.00.0950.02.5883.629510.0818050271797652163163158611.575955490.00174350.262-0.193
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfOtherLongTermDebt

us-gaap:ProceedsFromIssuanceOfOtherLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value49401921113274653562032124565391215.1370.01218127.415267.6311213122533199.4610.0510.7770.00.2390.00.00.0360.1060.123-0.0010.080.205-0.001
Percentage of ProceedsFromIssuanceOfOtherLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent us-gaap:OtherComprehensiveIncomeLocation

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent

gpi:FloorplanInterestExpense


Reclassification
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
Value-1500000.0-2200000.0-2600000.0-2600000.0-2100000.0-600000.0-800000.0-218000.0274000.0344000.0-679000.0-1022000.0-1262000.0-1737000.0-2305000.0-2339000.0
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstruments


Reclassification
Period End2020-12-312018-12-312018-09-30
Value0-200000.0-18000.0
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent-0.029.51.8

us-gaap:InterestExpense


Reclassification
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
Value-1000000.0-900000.0-1100000.0-900000.0-700000.0-100000.0-200000.0161000.0129000.0110000.0-23000.0-87000.0-136000.0-254000.0-346000.0-400000.0
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent66.740.942.334.633.316.725.0-73.947.132.03.48.510.814.615.017.1

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent us-gaap:OtherComprehensiveIncomeLocation, us-gaap:StatementEquityComponents

gpi:FloorplanInterestExpense, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-1500000.0-2200000.0-2600000.0-2600000.0-2100000.0-600000.0-800000.0-218000.0274000.0344000.0-1262000.0-1737000.0
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstruments, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2020-12-31
Value0
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent-0.0

us-gaap:InterestExpense, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-1000000.0-900000.0-1100000.0-900000.0-700000.0-100000.0-200000.0161000.0129000.0110000.0-136000.0-254000.0
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent66.740.942.334.633.316.725.0-73.947.132.010.814.6

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:ReclassificationFromAociCurrentPeriodTax


Reclassification
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
Value-1300000.0-700000.0-900000.0-900000.0-600000.0-200000.0-300000.0-3000.095000.0108000.0-340000.0-267000.0-115000.0-478000.0-1019000.0-1027000.0
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-1300000.0-700000.0-900000.0-900000.0-600000.0-200000.0-300000.0-3000.095000.0108000.0-115000.0-478000.0
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfOtherLongTermDebt

us-gaap:RepaymentsOfOtherLongTermDebt


Repayments
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
Value464543273726334363261329354032880.310.232149.5849.481220151610152322245.724-15.35114660.8461.1231.9750.840.4421.1990.8850.7670.4630.281
Percentage of RepaymentsOfOtherLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2020-12-312020-09-30
Value0.0550
Percentage of RepaymentsOfSeniorDebt0.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.21.90.03.810.015130.40.0
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.00.0100.0100.0100.0100.0100.00.0

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
Value0.90.33.00.115121.04.3
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeveranceCosts1 us-gaap:StatementBusinessSegments

us-gaap:SeveranceCosts1

gpi:BrazilSegment


Severance
Period End2020-12-312020-09-302020-06-302020-03-31
Value-1800000.000900000.0
Percentage of SeveranceCosts1100.00.00.0100.0

gpi:UnitedKingdomSegment


Severance
Period End2020-12-312020-09-302020-06-30
Value-2400000.001200000.0
Percentage of SeveranceCosts1133.30.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost us-gaap:StatementBusinessSegments

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost

gpi:UnitedStatesSegment


Share
Period End2020-09-302020-06-30
Value0.010
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost0.0100.0

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued


Stock
Period End2020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-09-302013-06-302013-03-31
Value-31.30.00.0-48.9-75.294-57.342-9.1990.0-1.069-3.160.083
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued100.00.00.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-09-302013-06-302013-03-31
Value-31.30.00.0-48.9-75.294-57.342-9.19984-1.069-2.0220.054
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued100.00.00.0100.0100.0100.0100.0100.00.0100.064.00.065.5

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:StockRepurchasedDuringPeriodValue


Stock
Period End2021-06-30
Value18
Percentage of StockRepurchasedDuringPeriodValue100.0

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Stock
Period End2021-06-30
Value18
Percentage of StockRepurchasedDuringPeriodValue100.0

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6.43.53.64.61.11.11.71.41.8441.4581.1081.1821.9161.2093.8521.0241.3891.251.2191.4271.8851.348-1.3111.7291.7921.3880.6851.0350.675
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6.43.53.64.51.11.11.71.41.8421.4551.1081.1811.9161.2083.8521.0231.3891.251.2181.4261.8841.348-1.311.7291.7921.3880.6991.00.619
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:ContractsInTransitAndVehicleReceivablesAllowanceForDoubtfulAccounts

gpi:ContractsInTransitAndVehicleReceivablesAllowanceForDoubtfulAccounts


Contracts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value300000.0200000.0300000.0300000.0400000.0300000.0300000.0
Percentage of ContractsInTransitAndVehicleReceivablesAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0

gpi:ContractsInTransitAndVehicleReceivablesGross

gpi:ContractsInTransitAndVehicleReceivablesGross


Contracts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value222254211219173115254
Percentage of ContractsInTransitAndVehicleReceivablesGross100.0100.0100.0100.0100.0100.0100.0

gpi:ContractsInTransitAndVehicleReceivablesNet

gpi:ContractsInTransitAndVehicleReceivablesNet


Contracts
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
Value222254211218173115253256252261265235249297306288217213269206212209252205233225237190210208225160185190204150150149167100105113
Percentage of ContractsInTransitAndVehicleReceivablesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:ContractsInTransitGross

gpi:ContractsInTransitGross


Contracts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value14117914714211467169
Percentage of ContractsInTransitGross100.0100.0100.0100.0100.0100.0100.0

gpi:DebtInstrumentRestrictiveCovenantsMaximumDividendsAndShareRepurchasesAmount us-gaap:CreditFacility

gpi:DebtInstrumentRestrictiveCovenantsMaximumDividendsAndShareRepurchasesAmount

us-gaap:RevolvingCreditFacility


Debt
Period End2020-12-31
Value235
Percentage of DebtInstrumentRestrictiveCovenantsMaximumDividendsAndShareRepurchasesAmount100.0

gpi:DeferredTaxAssetsInterestRateSwaps

gpi:DeferredTaxAssetsInterestRateSwaps


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
Value10.01.30.00.2595.59811108.3116126.572
Percentage of DeferredTaxAssetsInterestRateSwaps100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:DeferredTaxAssetsOperatingLeaseLiabilities

gpi:DeferredTaxAssetsOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value5655
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.0

gpi:FMCCOffset

gpi:FMCCOffset


F
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1216188.10.24.10.20.2260.120242422222126252227302520232122250.0
Percentage of FMCCOffset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

gpi:FloorplanNotesPayableCreditFacilityGross

gpi:FloorplanNotesPayableCreditFacilityGross


Floorplan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2246167677716961168114411991129125512921155114711991240107712141170113611101239123912651177120511381143107711221108114396010161001968718
Percentage of FloorplanNotesPayableCreditFacilityGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:FloorplanNotesPayableManufacturerAffiliates

gpi:FloorplanNotesPayableManufacturerAffiliates


Floorplan
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
Value274327327314357484459410426444417415404420397399430392392387397437389347308290307293298314346308301291211172174154155122136103
Percentage of FloorplanNotesPayableManufacturerAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:FloorplanOffset

gpi:FloorplanOffset


Floorplan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value3262311601089982106256972337111974864655975959351041102822793937643356478159112109
Percentage of FloorplanOffset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:ForecastedSeasonallyAdjustedAnnualRateOfNewVehicleSales us-gaap:StatementScenario

gpi:ForecastedSeasonallyAdjustedAnnualRateOfNewVehicleSales

us-gaap:ScenarioForecast


Forecasted
Period End2020-12-312019-12-312018-12-31
Value161616
Percentage of ForecastedSeasonallyAdjustedAnnualRateOfNewVehicleSales100.0100.0100.0

gpi:GeneralLiabilityAndWorkersCompensationLiability

gpi:GeneralLiabilityAndWorkersCompensationLiability


General
Period End2020-12-312019-12-312018-12-31
Value242424
Percentage of GeneralLiabilityAndWorkersCompensationLiability100.0100.0100.0

gpi:GuarantorObligationsMaximumExposureInestimableMinimumLeasePaymentsGuaranteed

gpi:GuarantorObligationsMaximumExposureInestimableMinimumLeasePaymentsGuaranteed


Guarantor
Period End2021-06-302021-03-312020-12-31
Value262728
Percentage of GuarantorObligationsMaximumExposureInestimableMinimumLeasePaymentsGuaranteed100.0100.0100.0

gpi:IntangibleAssetMeasurementInput us-gaap:MeasurementInputType, us-gaap:ReportingUnit

gpi:IntangibleAssetMeasurementInput

us-gaap:MeasurementInputDiscountRate, gpi:BrazilReportingUnit


Intangible
Period End2020-12-31
Value16.0
Percentage of IntangibleAssetMeasurementInput100.0

us-gaap:MeasurementInputDiscountRate, gpi:UnitedKingdomReportingUnit


Intangible
Period End2020-12-31
Value13.0
Percentage of IntangibleAssetMeasurementInput81.2

us-gaap:MeasurementInputDiscountRate, gpi:UnitedStatesReportingUnit


Intangible
Period End2020-12-31
Value11.0
Percentage of IntangibleAssetMeasurementInput68.8

gpi:LettersOfCreditOutstandingAsBeneficiary

gpi:LettersOfCreditOutstandingAsBeneficiary


Letters
Period End2021-06-30
Value4700000.0
Percentage of LettersOfCreditOutstandingAsBeneficiary100.0

gpi:LettersofCreditOutstandingasBeneficiary

gpi:LettersofCreditOutstandingasBeneficiary


Lettersof
Period End2021-03-312020-12-312020-09-30
Value4700000.05700000.05700000.0
Percentage of LettersofCreditOutstandingasBeneficiary100.0100.0100.0

gpi:LongTermDebtAndCapitalLeaseObligationsExcludingShortTermFinancingCurrent

gpi:LongTermDebtAndCapitalLeaseObligationsExcludingShortTermFinancingCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value596456655435459667177847461583942403856453327526972-34.519-30.516293526232322212514
Percentage of LongTermDebtAndCapitalLeaseObligationsExcludingShortTermFinancingCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:LongTermDebtOffset us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gpi:LongTermDebtOffset

gpi:FMCCFacility, us-gaap:LineOfCredit


Long
Period End2020-12-31
Value16
Percentage of LongTermDebtOffset100.0

gpi:FloorplanNotesPayable, us-gaap:LineOfCredit


Long
Period End2021-06-302020-12-31
Value326160
Percentage of LongTermDebtOffset0.01002.5

gpi:LongtermDebtOffset us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gpi:LongtermDebtOffset

gpi:FMCCFacility, us-gaap:LineOfCredit


Longterm
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1216188.10.24.10.20.150.1
Percentage of LongtermDebtOffset100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:FloorplanNotesPayable, us-gaap:LineOfCredit


Longterm
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2311601089982106256933
Percentage of LongtermDebtOffset1797.71002.5584.91230.941300.02604.912500.046204.733637.0

gpi:ManufacturerFloorplanAssistanceRecognizedAsReductionOfInventoryCost

gpi:ManufacturerFloorplanAssistanceRecognizedAsReductionOfInventoryCost


Manufacturer
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7.4109.79.19.6108.89.07.85.54.7
Percentage of ManufacturerFloorplanAssistanceRecognizedAsReductionOfInventoryCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:NewVehiclesInventoryGross

gpi:NewVehiclesInventoryGross


New
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value902132813031278117011691237119410951279123911561166125813041262
Percentage of NewVehiclesInventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:OperatingAndFinanceLeaseLiability

gpi:OperatingAndFinanceLeaseLiability


Operating
Period End2020-12-312019-12-31
Value353318
Percentage of OperatingAndFinanceLeaseLiability100.0100.0

gpi:OperatingAndFinanceLeaseRightOfUseAsset

gpi:OperatingAndFinanceLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-31
Value327295
Percentage of OperatingAndFinanceLeaseRightOfUseAsset100.0100.0

gpi:OtherLongTermDebtAndFinanceLeaseLiability us-gaap:LongtermDebtType

gpi:OtherLongTermDebtAndFinanceLeaseLiability

gpi:OtherDebt


Other
Period End2021-06-302020-12-31
Value765764
Percentage of OtherLongTermDebtAndFinanceLeaseLiability100.0100.0

gpi:OtherLongTermDebtMiscellaneous us-gaap:DebtInstrument

gpi:OtherLongTermDebtMiscellaneous

gpi:FinanceLease


Other
Period End2020-12-312019-12-31
Value12483
Percentage of OtherLongTermDebtMiscellaneous100.0100.0

gpi:OtherDebt


Other
Period End2020-12-312019-12-31
Value2042
Percentage of OtherLongTermDebtMiscellaneous16.051.6

gpi:OtherLongtermDebtandFinanceLeaseLiability

gpi:OtherLongtermDebtandFinanceLeaseLiability


Other
Period End2020-09-302019-12-31
Value776579
Percentage of OtherLongtermDebtandFinanceLeaseLiability100.0100.0

gpi:OtherLongtermDebtandFinanceLeaseLiability us-gaap:LongtermDebtType

gpi:OtherDebt


Other
Period End2021-03-312020-12-31
Value759764
Percentage of OtherLongtermDebtandFinanceLeaseLiability0.00.0

gpi:PartsAccessoriesandOtherInventoryGross

gpi:PartsAccessoriesandOtherInventoryGross


Parts
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value80857980808080828178777775747472
Percentage of PartsAccessoriesandOtherInventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value460400
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value16081547
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value20681947
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0

gpi:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

gpi:OfficeEquipmentFurnitureandFixtures


Property
Period End2020-12-312019-12-31
Value124118
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization6.06.1

us-gaap:Building


Property
Period End2020-12-312019-12-31
Value11071067
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization53.554.8

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-31
Value5636
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization2.71.9

us-gaap:Land


Property
Period End2020-12-312019-12-31
Value619571
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization30.029.3

us-gaap:MachineryAndEquipment


Property
Period End2020-12-312019-12-31
Value145138
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization7.07.1

us-gaap:Vehicles


Property
Period End2020-12-312019-12-31
Value1515
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization0.70.8

gpi:RentalVehiclesInventoryGross

gpi:RentalVehiclesInventoryGross


Rental
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value110140143142132130136144138141127131137142145134
Percentage of RentalVehiclesInventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:UsedVehiclesInventoryGross

gpi:UsedVehiclesInventoryGross


Used
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value374346343350359350359350344313293294315316309275
Percentage of UsedVehiclesInventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:VehicleReceivablesGross

gpi:VehicleReceivablesGross


Vehicle
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value81756476594884
Percentage of VehicleReceivablesGross100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsNotesAndLoansReceivableNetCurrent

us-gaap:AccountsNotesAndLoansReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value1962082001931521772252221881851931691782001881871581521731561511541571471441371511381421311351231321311119811485929275
Percentage of AccountsNotesAndLoansReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value1992102031971561802272241881971721812031911901611551761591541561601511471411541411441331371261341341129911586949476
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

gpi:AmountsDueFromManufacturers


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value941101081087497124111101105899410710911187859592878993888079867778727868666364545243484843
Percentage of AccountsReceivableGrossCurrent47.352.453.555.047.754.054.449.854.053.351.852.252.957.258.654.655.054.358.356.556.957.958.454.356.055.654.754.554.556.954.349.347.456.754.945.550.752.052.056.7

gpi:FinanceAndInsuranceReceivablesNet


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value30282724201928242226222131252320192421211922202119201817181916151616131613161613
Percentage of AccountsReceivableGrossCurrent15.113.513.512.613.010.512.411.111.913.412.912.115.313.212.412.712.514.113.413.912.713.913.614.313.613.512.912.413.714.013.111.812.214.214.014.215.717.817.818.3

gpi:OtherReceivable


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value159.91311151218319.88138.826101217161615209.46412121211119.7811211129.3377.9799.28219211412281211115.057
Percentage of AccountsReceivableGrossCurrent7.74.76.86.010.17.18.213.85.26.95.16.06.29.18.710.210.011.56.07.88.38.07.37.66.98.47.98.77.05.87.314.716.113.212.624.714.912.112.16.6

gpi:PartsAndServiceReceivables


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value59615351455157575451525352393836343535333432313533353435333131323217181716161614
Percentage of AccountsReceivableGrossCurrent29.929.426.226.329.228.425.025.428.826.330.229.725.620.520.222.522.520.022.421.822.220.220.723.823.422.624.624.324.923.325.324.224.315.818.515.618.718.018.018.4

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value2800000.02300000.03200000.03600000.03500000.03400000.02800000.02500000.03074000.03200000.03133000.02931000.03221000.03138000.02943000.02616000.02366000.02896000.02736000.02541000.02790000.03204000.03943000.03382000.03674000.03641000.02799000.02421000.02260000.02285000.02985000.02404000.02425000.01645000.01375000.01144000.01078000.01243000.01243000.01001000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:UnusualOrInfrequentItem

gpi:COVID19


Allowance
Period End2020-09-30
Value400000.0
Percentage of AllowanceForDoubtfulAccountsReceivable11.1

us-gaap:CashEquivalentsAtCarryingValue us-gaap:CashAndCashEquivalents

us-gaap:CashEquivalentsAtCarryingValue

gpi:DemandNotes


Cash
Period End2021-06-302021-03-312020-12-312020-09-30
Value100596030
Percentage of CashEquivalentsAtCarryingValue100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
Period End2020-12-312019-12-312018-12-31
Value352114
Percentage of ContractWithCustomerAssetNet100.0100.0100.0

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerAssetNetCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value39363529252221
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerRefundLiability

us-gaap:ContractWithCustomerRefundLiability


Contract
Period End2020-12-312019-12-312018-12-31
Value474946
Percentage of ContractWithCustomerRefundLiability100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCarryingAmount

gpi:FMCCFacility, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2682111133137235208166177160
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:FloorplanNotesPayable, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value51180890184076312071206118911681251
Percentage of DebtInstrumentCarryingAmount1908.6980.0810.8630.9557.0512.9578.4712.9657.5778.3

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

gpi:A4.00SeniorNotes, us-gaap:SeniorNotes


Debt
Period End2020-08-17
Value4.21
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:LongtermDebtType

gpi:A4.00SeniorNotes


Debt
Period End2020-12-31
Value4.21
Percentage of DebtInstrumentInterestRateEffectivePercentage0.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentRepurchasedFaceAmount

gpi:A5.00SeniorNotes


Debt
Period End2020-09-02
Value550
Percentage of DebtInstrumentRepurchasedFaceAmount100.0

us-gaap:DebtInstrumentUnamortizedDiscount

us-gaap:DebtInstrumentUnamortizedDiscount


Debt
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312018-12-31
Value10112.95.15.67.4
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet


Debt
Period End2020-09-022020-04-02
Value2600000.01900000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value3600000.03900000.04100000.04500000.04700000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet0.00.00.00.00.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet us-gaap:DebtInstrument

us-gaap:RevolvingCreditFacility


Debt
Period End2021-06-302020-12-31
Value3100000.03600000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet0.00.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-03-312020-12-31
Value3300000.03600000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet0.00.0

us-gaap:DebtInstrumentUnamortizedPremium

us-gaap:DebtInstrumentUnamortizedPremium


Debt
Period End2020-09-022020-04-02
Value700000.0600000.0
Percentage of DebtInstrumentUnamortizedPremium100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DebtLongtermAndShorttermCombinedAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value139113571362138414221499150113761367134013661379141914341357133513041263126912781284128312551140111811471081973969694699586565572577567533510497466
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:CreditFacility

us-gaap:DebtWeightedAverageInterestRate

gpi:RevolvingCreditFacilityFloorplanLine


Debt
Period End2020-12-312020-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1.21.220.0370.0370.0330.03200.027000.0220.020.0170.0170.0170.017
Percentage of DebtWeightedAverageInterestRate100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrent

us-gaap:DeferredCompensationLiabilityCurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value5300000.03300000.0800000.0800000.0
Percentage of DeferredCompensationLiabilityCurrent100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value78726156
Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1011114.42.34.82.42.9
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-31
Value8400000.04400000.03600000.0
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0

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
Value260248176170229199186199150133
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2600000.044000.02770000.05907000.07621000.00
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302012-12-312011-12-31
Value1881769710512311099982.38782
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value28373740342021130.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


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
Value3438171716171614131315
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2200000.01500000.084000.0379000.00
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves


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
Value5242414459535043342722
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets


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
Value142135123118160143138141927964
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-312019-12-31
Value4545
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


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
Value2000000.0072000.01820000.03317000.01060000.01936000.0999000.01374000.01788000.0367000.0
Percentage of DeferredTaxLiabilitiesOther100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


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
Value7168505064534339332613
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-31
Value13
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0

us-gaap:DerivativeAssets

us-gaap:DerivativeAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10182.30.01.90.31.0068.44132118159.501
Percentage of DerivativeAssets100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent

us-gaap:DerivativeAssetsCurrent


Derivative
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1900000.0000189000.0444000.0
Percentage of DerivativeAssetsCurrent100.00.00.00.0100.0100.0

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeAssetsNoncurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10180.30.00.01.90.31.0068.251132118159.501
Percentage of DerivativeAssetsNoncurrent100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAverageFixedInterestRate us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAverageFixedInterestRate

gpi:InterestRateSwapsForwardStarting


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value1.21.41.470.01570.0160.0170.0170.0190.0180.0190.0180.01800.021000.0220.0220.0230.0230.0230.0260.026
Percentage of DerivativeAverageFixedInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value1.481.41.690.01730.01910.0220.0230.0230.0230.0240.0260.0260.0260.0250.0250.0250.0250.0250.0260.0260.0260.0270.0280.025
Percentage of DerivativeAverageFixedInterestRate123.3100.0115.0110.2119.4129.4135.3121.1127.8126.3144.4144.40.0119.00.00.0113.6113.6113.0113.0113.0103.8107.70.0

us-gaap:DerivativeAverageFixedInterestRate us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

gpi:InterestRateSwapII, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-30
Value1.2
Percentage of DerivativeAverageFixedInterestRate0.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-30
Value1.38
Percentage of DerivativeAverageFixedInterestRate0.0

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilities


Derivative
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
Value2521445152467.2148.0422.6841.8110.7552.2794.68910
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2100000.03200000.04200000.01800000.03200000.04400000.02800000.0500000.0748000.0254000.0115000.0311000.0682000.01177000.01996000.0823000.01626000.02597000.03941000.000361000.02119000.04719000.07273000.07656000.0815000.01098000.0
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilitiesNoncurrent


Derivative
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
Value2317404949414.4137.2942.431.6960.4441.5973.5128.583161817204549433139293325232725262928404344382726251616
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

gpi:InterestRateSwapsForwardStarting


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value425575700608580450450325
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value943798929904786546896901
Percentage of DerivativeNotionalAmount221.9138.9132.8148.6135.4121.4199.3277.4

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

gpi:InterestRateSwapI, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-30
Value700
Percentage of DerivativeNotionalAmount0.0

gpi:InterestRateSwapII, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-30
Value425
Percentage of DerivativeNotionalAmount0.0

us-gaap:DerivativeNotionalAmount us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2021-06-30
Value250
Percentage of DerivativeNotionalAmount0.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:PerformanceShares


Employee
Period End2020-12-31
Value1.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:RestrictedStock


Employee
Period End2020-12-31
Value23
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized2310.0

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2020-12-31
Value2.2
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized220.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1241239087836654
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability us-gaap:LongtermDebtType

gpi:OtherDebt


Finance
Period End2021-06-302021-03-312020-12-31
Value122123124
Percentage of FinanceLeaseLiability0.00.099.9

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2020-12-312019-12-31
Value9400000.06600000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2020-12-312019-12-31
Value11576
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value170
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value71
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-31
Value16
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value33
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-31
Value25
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value11
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value12
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value45
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2020-12-312019-12-31
Value11775
Percentage of FinanceLeaseRightOfUseAsset100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2020-12-312019-12-31
Value6.27.2
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss


Goodwill
Period End2021-03-312020-12-312020-09-302019-12-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-31
Value10897979797979797979742
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss us-gaap:StatementBusinessSegments

gpi:BrazilSegment


Goodwill
Period End2021-03-312020-12-312020-09-30
Value675757
Percentage of GoodwillImpairedAccumulatedImpairmentLoss62.658.558.5

us-gaap:IndefiniteLivedFranchiseRights

us-gaap:IndefiniteLivedFranchiseRights


Indefinite
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
Value236236232241240251253252259260259276287295285294285285284310322319307339331305303335314301301279274285196194195182170166166158
Percentage of IndefiniteLivedFranchiseRights100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet

us-gaap:InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-30
Value-9800000.03200000.02300000.01800000.0
Percentage of InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet100.0100.0100.0100.0

us-gaap:InventoryGross

us-gaap:InventoryGross


Inventory
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value146819011869185217431731181417721660181217371660169417921833174516411664155315631497152115441549135713631198
Percentage of InventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryValuationReserves

us-gaap:InventoryValuationReserves


Inventory
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value8.89.78.5248.5059.3319.934109.0678.6879.018.4018.2227.6128.0317.4547.986.8486.8955.9556.3627.0257.4067.3717.6565.7115.6055.3264.3552.422
Percentage of InventoryValuationReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value33
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value171718202325
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:CreditFacility

us-gaap:LineOfCredit

gpi:BrazilianCreditFacility


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value6.76.48.913151416151620222218152316
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:OtherCreditFacilities


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value232200228249255243249
Percentage of LineOfCredit3467.23126.62569.71795.01637.21693.11537.0

gpi:RentalVehicleCreditFacility


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value949197109113112116117111108116114112103108116111
Percentage of LineOfCredit1409.01429.71097.8788.5730.1781.9717.3744.3689.4540.8508.8508.0614.8668.8470.1694.60.0

gpi:RevolvingCreditFacilityAcquisitionLine


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value47571366872493829313239282733320.00.00.010.00.00.0
Percentage of LineOfCredit713.4904.71534.8489.9464.7341.7235.3185.70.0202.4197.0123.00.0148.9177.60.00.00.059.90.00.0

gpi:UKCreditFacilities


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value13110212212612511611616115916813914912212312691989483103
Percentage of LineOfCredit1958.21596.91373.0906.5806.4811.1719.81023.40.01046.0694.0656.10.0547.1689.1594.20.0408.7501.80.0

us-gaap:LineOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCredit, gpi:RevolvingCreditFacilityAcquisitionLine


Line
Period End2021-06-302021-03-312020-12-31
Value764847
Percentage of LineOfCredit0.00.0713.4

us-gaap:LineOfCredit us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gpi:BrazilianCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value244.3
Percentage of LineOfCredit0.00.0

gpi:OtherCreditFacilities, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value247258
Percentage of LineOfCredit0.00.0

gpi:RentalVehicleCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value9197
Percentage of LineOfCredit0.00.0

gpi:UKCreditFacilities, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value131156
Percentage of LineOfCredit0.00.0

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd

gpi:RevolvingCreditFacilityAcquisitionLine


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.291.30.0160.01850.01950.01950.01950.02450.02470.02470.02240.0230.023
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCredit, gpi:RevolvingCreditFacilityAcquisitionLine


Line
Period End2021-06-302021-03-31
Value1.051.16
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd0.00.0

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd us-gaap:Range, us-gaap:CreditFacility

srt:Maximum, gpi:BrazilianCreditFacility


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value10.010.00.10.140.140.1470.1470.15120.16630.13760.1663
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd775.2769.2625.0756.8717.9753.8753.8617.1673.3557.1742.4

srt:Maximum, gpi:RentalVehicleCreditFacility


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6.06.00.060.050.0630.0650.070.070.06750.06750.065
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd465.1461.5375.0270.3323.1333.3359.0285.7273.3273.3290.2

srt:Maximum, gpi:UKCreditFacilities


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.04.00.040.040.0430.0430.0430.04320.03420.03450.0345
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd310.1307.7250.0216.2220.5220.5220.5176.3138.5139.7154.0

srt:Minimum, gpi:BrazilianCreditFacility


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2.02.00.020.040.0490.1110.1080.10810.10810.1080.1092
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd155.0153.8125.0216.2251.3569.2553.8441.2437.7437.2487.5

srt:Minimum, gpi:RentalVehicleCreditFacility


Line
Period End2020-12-312020-06-302020-03-312019-12-312019-09-30
Value1.00.020.010.0270.038
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd77.5125.054.1138.5194.9

srt:Minimum, gpi:UKCreditFacilities


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.01.00.010.010.0140.0130.0140.01220.02170.02150.0165
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd77.576.962.554.171.866.771.849.887.987.073.7

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:Maximum, gpi:BrazilianCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value12.010.0
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd0.00.0

srt:Maximum, gpi:RentalVehicleCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value5.06.0
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd0.00.0

srt:Minimum, gpi:BrazilianCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-31
Value4.02.0
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd0.00.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value59645665543545966719692767658778053467262423755557669724130293627243731301514141253
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtFairValue

gpi:RealEstateRelated, us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value81828488893940447179
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gpi:RealEstateRelated, us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value73747780813841457276
Percentage of LongTermDebtFairValue91.289.891.391.390.499.0101.0100.9100.895.7

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

gpi:A4.00SeniorNotes, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value559545567539
Percentage of LongTermDebtFairValue690.5660.5672.6612.5

us-gaap:LongTermDebtFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value631632634638636586885888913920
Percentage of LongTermDebtFairValue779.0765.9752.4724.3709.21491.32174.71983.91270.01156.7

us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value633619644620631549910912936884
Percentage of LongTermDebtFairValue781.7750.2763.9703.7702.81397.72236.62037.71302.51111.8

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value902
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value57
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value93
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value144
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value94
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value70
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value5.66.1
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value85113113
Percentage of OperatingLossCarryforwards100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-31
Value564620271
Percentage of OperatingLossCarryforwards663.7547.8240.1

us-gaap:OtherDeferredCostsNet

us-gaap:OtherDeferredCostsNet


Other
Period End2021-06-30
Value2400000.0
Percentage of OtherDeferredCostsNet100.0

us-gaap:OtherLongTermDebt

us-gaap:OtherLongTermDebt


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value76425253842343033
Percentage of OtherLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLongTermDebt us-gaap:DebtInstrument

gpi:RealEstateRelated


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value619628620455453382402420
Percentage of OtherLongTermDebt81.12444.02443.31187.21059.11119.61327.81253.2

us-gaap:OtherLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gpi:RealEstateRelated, gpi:OtherDebt


Other
Period End2021-06-302021-03-312020-12-31
Value623609619
Percentage of OtherLongTermDebt0.00.081.1

us-gaap:OtherLongTermDebt us-gaap:LongtermDebtType

gpi:OtherDebt


Other
Period End2021-06-302021-03-312020-12-31
Value192620
Percentage of OtherLongTermDebt0.00.02.6

us-gaap:PledgedAssetsNotSeparatelyReportedRealEstate

us-gaap:PledgedAssetsNotSeparatelyReportedRealEstate


Pledged
Period End2020-12-312019-12-312018-12-31
Value893436390
Percentage of PledgedAssetsNotSeparatelyReportedRealEstate100.0100.0100.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2225193988829656
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-31
Value491475460
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-31
Value164516401608
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-31
Value81.1565.83
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302017-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value76.2270.1969.1771.671.9371.868.2368.1266.0864.8455.8354.3953.2844.4143.1941.87
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue93.9106.60.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-31
Value130.353.33
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue160.681.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

gpi:IncentivePlan


Share
Period End2020-12-312019-12-31
Value2200000.01200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-31
Value1700000.02100000.01400000.01000000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0

Line plots across dimensions of each concept


COGS Ratio
us-gaap:ProductOrService
(None,)
C O G S  Ratious-gaap: Product Or Service
EBT Margin
us-gaap:StatementBusinessSegments
(None,)
E B T  Margin us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
(None,)
Cost Of Goods And Services Soldus-gaap: Product Or Service
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:StatementBusinessSegments
(None,)
Income Loss From Continuing Operations 
Before Income Taxes Minority Interest And Income Loss From Equity Method Investmentsus-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
Assetsus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementBusinessSegments
(None,)
Property Plant And Equipment Netus-gaap: Statement Business Segments
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:StatementBusinessSegments
(None,)
Indefinite Lived Intangible Assets Excluding Goodwillus-gaap: Statement Business Segments
us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:StatementBusinessSegments
(None,)
Operating Lease Right Of Use Assetus-gaap: Statement Business Segments
us-gaap:LongTermDebt
us-gaap:DebtInstrument
(None,)
Long Term Debtus-gaap: Debt Instrument
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:LineOfCredit')
Long Term Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components