AMG


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:InterestExpense

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:OperatingExpenses

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:Revenues

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:AmortizationOfIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:IncomeStatementLocation
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:Goodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OtherAssets

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

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:ConsolidatedEntities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:IncomeTaxAuthority, us-gaap:ValuationAllowanceByDeferredTaxAsset

amg:AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests

amg:AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests
us-gaap:StatementEquityComponents
amg:AffiliateEquityCompensationExpenseAttributabletoNoncontrollingInterest

amg:AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest
us-gaap:StatementEquityComponents

amg:AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest

amg:AmortizationandImpairmentsofIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:CompensationExpensesRelatedToAffiliateEquity
us-gaap:ConsolidatedEntities
amg:DeferredIncomeTaxExpenseRelatedToIntangibles
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
amg:DeferredTaxLiabilitiesNetDecreaseResultingFromRepurchaseOfDebt

amg:DepreciationAndOtherAmortization
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:EquityMethodInvestmentIntangibleAssetAmortizationandImpairments
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:EquityMethodInvestmentOtherIncreaseDecrease
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:EquityMethodInvestmentRealizedGainLossonForeignCurrencyTranslation
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FairValueAssumptionsAverageProjectedGrowthRate
us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FairValueAssumptionsDiscountRateForAssetsBasedFees
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FairValueAssumptionsMarketParticipantTaxRate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
amg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesAndIssuances
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
amg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAndReductions
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
amg:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedinEarningsandOtherComprehensiveIncomeLoss
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FiniteLivedIntangibleAssetsAccumulatedAmortizationTransfers
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossBeforeAdjustmentOnAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:FiniteLivedIntangibleAssetsGrossTransfers
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
amg:GainLossOnDerivativeUsedInCashFlowHedgeAndNetInvestmentHedgeAfterTax

amg:IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent
us-gaap:ConsolidatedEntities
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:IncomeLossfromEquityMethodInvestmentsBeforeAmortizationofIntangibles

amg:IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
amg:IntangibleAssetsNetExcludingGoodwillTranslationAdjustments

amg:InvestmentAndOtherIncomeLoss

amg:NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

amg:NoncontrollingInterestDecreasefromTransferstoOtherLiabilities

amg:NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests
us-gaap:StatementEquityComponents

amg:NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships

amg:NoncontrollingInterestIncreasefromContributionsfromAffiliate
us-gaap:StatementEquityComponents
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:ObligationsAndPaymentsToAcquireInterestInSubsidiariesAndAffiliates
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
amg:OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent
us-gaap:HedgingDesignation
amg:OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:HedgingDesignation
amg:OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossReclassificationBeforeTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
amg:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent

amg:ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases

amg:PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts

amg:RedeemableNoncontrollingInterestEquityChangeInRedemptionValue
us-gaap:StatementEquityComponents

amg:SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts
us-gaap:AwardType
amg:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceConditionChangesWeightedAverageGrantDateFairValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CashDivestedFromDeconsolidation
us-gaap:ConsolidatedEntities
us-gaap:CurrentIncomeTaxExpenseBenefit
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet
us-gaap:ConsolidatedEntities
us-gaap:DeferredOtherTaxExpenseBenefit

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillOtherIncreaseDecrease
us-gaap:ConsolidatedEntities, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
us-gaap:ConsolidatedEntities, us-gaap:ProductOrService, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementEquityComponents
us-gaap:ProductOrService, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:ProductOrService, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementEquityComponents

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate

us-gaap:IncreaseDecreaseInOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:InterestOnConvertibleDebtNetOfTax

us-gaap:LaborAndRelatedExpense

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax
us-gaap:StatementEquityComponents

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsToAcquireBusinessesAndInterestInAffiliates

us-gaap:PaymentsToAcquireInterestInSubsidiariesAndAffiliates

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseNetOfTax

us-gaap:TreasuryStockAcquiredAverageCostPerShare

us-gaap:TreasuryStockSharesAcquired
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

amg:AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax
us-gaap:StatementEquityComponents
amg:AffiliateEquityUnrecognizedCompensationExpenseAttributabletoNoncontrollingInterest

amg:DeferredTaxAssetsOperatingLeaseLiability

amg:DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions

amg:DeferredTaxLiabilitiesConvertibleSecuritiesInterest

amg:DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization
us-gaap:LongtermDebtType
amg:DeferredTaxLiabilityFromExcessInterestExpenseCalculation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
amg:DuetoRelatedPartiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

amg:InvestmentCommitmentAmount
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:LiabilitiesAndNoncontrollingInterests

amg:MarketableSecuritiesCost
us-gaap:ConsolidatedEntities
amg:MarketableSecuritiesFairValue
us-gaap:ConsolidatedEntities
amg:MarketableSecuritiesFairValueDeconsolidation
us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
amg:MarketableSecuritiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

amg:MarketableSecuritiesUnrealizedGains

amg:MarketableSecuritiesUnrealizedLosses
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
amg:ObligationstoRelatedPartiesMeasurementInput
us-gaap:IncomeTaxAuthority
amg:OperatingLossCarryforwardsForeignNotSubjectToExpiration
us-gaap:OtherCommitments
amg:OtherCommitmentDueInSecondThirdOrFourthYear
us-gaap:OtherCommitments
amg:OtherCommitmentDueInThirdFourthAndFifthYear
us-gaap:OtherCommitments
amg:OtherCommitmentExpectedPayments
us-gaap:OtherCommitments
amg:OtherCommitmentToBePaidAfterYearOne

amg:OtherInvestmentsandOtherAssets
us-gaap:RelatedPartyTransactionsByRelatedParty
amg:UnrecognizedCompensationExpensesRelatedtoAffiliateEquityAttributabletoControllingInterest

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccountsReceivableNet
us-gaap:ConsolidatedEntities, us-gaap:InvestmentType
us-gaap:AlternativeInvestment
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:AssetsNet
us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:ConvertibleDebtFairValueDisclosures
us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign
us-gaap:BalanceSheetLocation

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome
us-gaap:BalanceSheetLocation
us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeAssets
us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeLiabilities
us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation
us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement
us-gaap:BalanceSheetLocation
us-gaap:DueFromAffiliates
us-gaap:BalanceSheetLocation
us-gaap:DueToAffiliateCurrentAndNoncurrent

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquityMethodInvestments

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:FairValueByLiabilityClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:ValuationTechnique
us-gaap:LiabilitiesFairValueDisclosure

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:MarketableSecurities
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:NotesPayableFairValueDisclosure
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority, us-gaap:TaxPeriod
us-gaap:BalanceSheetLocation
us-gaap:OperatingLossCarryforwardsValuationAllowance

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent
us-gaap:OtherCommitments
us-gaap:OtherCommitment
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInNextTwelveMonths
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInSecondYear
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:OtherCommitments
us-gaap:OtherCommitmentsFutureMinimumPaymentsRemainderOfFiscalYear

us-gaap:OtherInvestments

us-gaap:OtherLiabilities
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:OtherMinorityInterests

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:ShareRepurchaseProgram, us-gaap:StatementClassOfStock
us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

us-gaap:StockholdersEquityBeforeTreasuryStock

us-gaap:TreasuryStockCommonShares

us-gaap:TreasuryStockShares

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:ConsolidatedEntities
us-gaap:VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure
us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount
us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Property Plant And Equipment Net
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Other Liabilities
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Treasury Stock Shares
DividendsAndRepurchase
Dividends
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄0.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.6
us-gaap:CommonStockSharesOutstanding ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄58.558.558.558.558.558.558.558.558.558.558.558.558.558.558.558.558.5NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█44.645.4NA46.547.347.8NA50.451.051.9NA55.454.257.0NA58.358.759.2
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█41.642.6NA46.347.247.8NA50.451.051.9NA53.154.054.6NA55.856.356.7
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities amg:EmployeeStockOptionsandRestrictedStock▁█0.30.4NA2.93.23.3NA2.30.60.6NA0.20.20.1NA0.00.20.2
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:ConvertibleDebtSecuritiesNANANA2.22.22.2NA2.22.22.2NA0.02.20.0NANA0.0NA
us-gaap:EarningsPerShareBasic ▆▆▆▅▄▄▄▅▅▁▂▆▅▆█▆▅▅2.623.522.511.540.65-0.330.441.712.11-3.87-2.77000000000000052.352.172.85.652.252.242.16
us-gaap:EarningsPerShareDiluted ▆▆▆▅▄▄▄▅▅▁▂▆▆▆█▆▆▅2.553.412.51.530.65-0.330.461.712.11-3.87-2.882.342.162.775.52.222.222.13
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 Net profit Margin us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesNANANA116.2460.1NANA122.7519.9NANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▄▂▇▅█▁▆▃▂▁▂▃▂▂▂▂▂▂13.69.721.015.722.58.219.211.710.28.811.211.711.110.710.410.310.39.4
us-gaap:ComprehensiveIncomeNetOfTax ▅▆▆▅▄▃▄▄▅▁▁▄▅▆█▆▅▅118.0174.4172.586.86.8-53.338.756.4119.5-198.7-200.171.4111.2173.9344.6168.7140.6136.7
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▆▄▇▅▁▂█▅▅▆▃▆▆▆▆█▇▅74.164.090.565.932.239.493.668.665.274.446.374.173.879.580.896.986.173.7
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▅▆▆▅▃▃▄▄▅▁▁▅▅▆█▆▆▅192.1238.4263.0152.739.0-13.9132.3125.0184.7-124.3-153.8145.5185.0253.4425.4265.6226.7210.4
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ██▇▆▅▄▅▇▇▁▃▇▇█████255.1264.6234.2165.366.842.294.3192.6215.9-194.8-63.6250.4239.3287.5264.0282.9266.9253.3
us-gaap:IncomeTaxExpenseBenefit █▇▇▇▆▆▅▇▇▃▇▇▇█▁███70.950.538.437.53.32.2-1.530.535.7-61.835.248.534.163.5-129.866.162.559.7
us-gaap:InterestExpense ▇█▇▅▄▂▂▂▂▁▁▂▄▄▂▄▄▄26.827.526.70000000000000623.822.319.518.819.519.718.218.019.621.421.619.521.522.421.9
us-gaap:NetIncomeLoss ▅▆▅▅▄▄▄▅▅▁▂▅▅▆█▅▅▅109.0149.9115.971.330.7-15.622.586.3107.7-200.8-151.3124.9117.0153.0315.4125.4126.3122.5
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest █▁75.264.2NANA32.855.6NANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic 109.0NANANA30.7NANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▅▆▅▅▄▃▄▅▅▁▁▅▅▆█▅▅▅113.6154.6115.971.330.7-15.622.586.3107.7-200.8-165.5129.6117.0157.7319.2129.3130.2126.3
us-gaap:OperatingExpenses ▄▃▄▁▅▁█▂▅▄▇▆▅▇▄▂▂▂389.9378.5386.7359.2409.6354.3445.0373.4412.6387.8427.3421.6407.6435.4394.7366.9370.0367.7
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▅▆█▆▃▁▆▂▅▅▁▁▃▆▆▇▆▅7.523.866.624.7-23.2-52.935.8-37.65.27.5-54.6-56.4-20.229.135.953.026.912.2
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▅▆█▆▃▁▆▂▄▅▁▁▃▆▆▇▅▅7.924.367.224.9-24.5-53.936.5-37.14.58.7-55.0-56.4-20.229.431.648.822.316.8
us-gaap:ProfitLoss ▅▆▅▄▄▃▄▅▅▁▁▅▅▆█▆▅▅184.2214.1195.8127.863.540.095.9162.1180.2-133.0-98.8201.9205.2224.0393.8216.8204.4193.6
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▇▅▅▂▁▃▅▅▇▅▆▇▇██▇▆▅586.3559.1554.3494.8471.1507.3555.5549.0591.9543.1564.4601.3600.2612.5604.1585.7570.9544.3
 us-gaap:Revenues us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesNANANA116.2460.1NANA122.7519.9NANANANANANANANANA
us-gaap:SellingGeneralAndAdministrativeExpense ▄▂▃▁▁▅▅▅▆▆▇▇██▇▅▄▄88.678.883.574.173.690.393.591.596.295.6103.3102.8105.2106.4103.491.989.188.7
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets ▄▂▃▂▁▁▂▂▂▂▅▇▇▇███▇8021.77680.67888.97669.57496.17482.37653.57679.07727.87677.08219.18538.88490.58584.28702.18701.48632.38590.1
us-gaap:Liabilities █▅▆▅▃▃▂▁▁▁▂▂▁▁▂▃▄▃4108.13762.73900.13689.13472.13391.63237.73198.73174.83161.93250.53248.73179.63220.03311.73492.53531.33487.6
us-gaap:LiabilitiesAndStockholdersEquity ▄▂▃▂▁▁▂▂▂▂▅▇▇▇███▇8021.77680.67888.97669.57496.17482.37653.57679.07727.87677.08219.18538.88490.58584.28702.18701.48632.38590.1
us-gaap:StockholdersEquity ▁▁▂▂▂▃▃▄▅▄▆▇▇▇█▇▇▇2609.62651.22779.72848.92854.72980.02937.53070.03225.33140.43457.43618.23639.33677.03822.23627.53600.03584.9
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▆▅█▇▅▄▃▂▂▁▄▂▂▁▂▂▂▁777.9766.21039.7929.4681.6592.2539.6402.5360.0305.2565.5448.1392.8334.2439.5374.7364.6293.6
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▆▅█▇▅▄▃▂▂▁▃▂777.9766.21039.7929.4681.6592.2539.6402.5360.0305.2565.5448.1NANA439.5NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA255.1NANANA251.1NANANA250.7NANANA247.3NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType amg:BuildingAndLeaseholdImprovementsNANA116.5NANANA116.3NANANA117.8NANANA111.9NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA21.0NANANA21.3NANANA21.0NANANA21.4NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandAndLandImprovementsNANA18.0NANANA17.9NANANA18.6NANANA18.7NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:OfficeEquipmentNANA44.3NANANA43.0NANANA42.3NANANA44.5NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareAndSoftwareDevelopmentCostsNANA55.3NANANA52.6NANANA51.0NANANA50.8NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA175.5NANANA158.8NANANA146.4NANANA136.3NANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▁▁▁▁█▄▅▅8.8999999999999997.57.17.035.120.621.421.1NANANANANANANANANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:IncomeStatementLocation us-gaap:CustomerRelationships,amg:IntangibleAmortizationandImpairments█▁8.97.5NA7.020.620.6NA21.121.229.6NA30.123.223.2NA21.222.021.9
 us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:RelatedPartyTransactionsByRelatedParty us-gaap:CustomerRelationships,us-gaap:EquityMethodInvestee▁█29.335.2NA34.336.939.3NA42.138.923.2NA22.223.530.0NA25.924.021.7
us-gaap:PropertyPlantAndEquipmentNet ▁▁▂▂▃▄▄▄▆▆▇▇█████▇75.876.179.681.685.888.992.392.999.8102.3104.3104.8109.2111.3111.0111.7109.7109.1
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▂▁▂▁▁▁▂▃▃▃▅▇▇▇████2119.11999.52074.81974.71991.02038.72195.62359.72330.22318.52791.03055.33134.03177.03304.73290.83278.73298.8
us-gaap:Goodwill █▇▇▃▂▁▅▂▄▄▃▅▅█▇▇▅▃2669.72666.22661.42638.82627.62621.82651.72629.82639.52642.42633.42648.42648.62667.32662.52661.82647.52633.7
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▂▂▂▁▂▄▅▆▆▇▆▇▇█▇▇▇▆913.0911.8909.0889.6900.8947.2972.2994.51004.51014.51006.31014.81019.91043.11028.71025.41014.91001.4
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▁▁▁▁▃▃▄▄▅▅▆▇▇▇███1036.81044.31048.81035.21052.31133.81182.01222.61257.11289.51309.91357.41393.31443.11449.71467.21476.11482.4
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▁▁▁▁▂▂▃▃▄▄▅▅▆▆▇▇██123.8132.5139.8145.6151.5186.6209.8228.1252.6275.0303.6342.6373.4400.0421.0441.8461.2481.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:LongTermDebt ████▇▇▆▆▆▆▁▄▅▅▁▁▁▁2299.32303.12312.12310.82042.82044.91793.81792.61791.41780.7779.71534.81576.71556.4809.0868.9788.8783.7
us-gaap:DeferredIncomeTaxLiabilitiesNet ▇▄▃▂▁▁▅▂▃▃█▆▆▆▅497.1432.9423.4400.4388.3393.4450.2411.6421.7418.5511.6479.2471.7474.9467.4NANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA36.7NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA32.0NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA25.9NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA21.3NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA59.6NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity ▁▁▂▂▂▃▃▄▅▄▆▇▇▇█▇▇▇2609.62651.22779.72848.92854.72980.02937.53070.03225.33140.43457.43618.23639.33677.03822.23627.53600.03584.9
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▁▁▂▂▂▃▃▃▄▄▆▇▇▇█▇▇▇3157.93187.33317.33328.43341.93508.93499.13633.23825.83760.34134.94321.24357.44422.64578.54404.34370.44369.0
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄0.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.6
us-gaap:AdditionalPaidInCapitalCommonStock ▁▂▄▅▅▇▄▅▆▆▆▄▄▃▆▇██539.3619.7728.9764.1768.2860.7707.2742.6835.8804.4835.6707.9679.7664.2808.6849.7912.3925.2
us-gaap:RetainedEarningsAccumulatedDeficit █▇▆▆▅▅▅▅▅▄▆▇▆▅▄▂▂▁4263.44154.94005.53890.13819.33789.13819.83813.63743.73652.63876.84044.13935.53834.93698.53394.43280.33165.4
us-gaap:TreasuryStockValue ██▇▆▆▆▅▅▄▄▄▄▃▃▂▂▁▁2128.92050.21857.01651.01563.01523.91481.31361.81259.71210.31146.61074.3969.8821.8663.7566.1498.8397.6
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▄▂▇▅█▁▆▃▂▁▂▃▂▂▂▂▂▂13.69.721.015.722.58.219.211.710.28.811.211.711.110.710.410.310.39.4
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▅▇▁▄▃▆▃▄▅▇▃▅▆█▅▅▅▅90.9102.657.277.472.199.671.383.988.1104.676.988.392.9112.485.488.286.692.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▅█▆▆▃▇▇▇▁▆▇█▅██▇▃362.0188.9382.5251.4289.885.6312.5307.4327.1-17.9264.4298.9372.3205.0369.9356.5321.9122.1
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▄▄▅▅▅█▂▄▅▅▅▄▅▅▅▅▅-146.6-24.1-45.7-11.1-12.815.9115.5-96.9-42.9-0.12.74.6-21.6-3.98.93.9-15.316.3
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▁▄█▅▇▃▅▄▄▆▄▃▃▃▂▄▄-201.1-440.9-233.94.8-188.6-37.7-300.5-163.8-226.7-243.7-141.4-245.9-282.7-313.1-318.2-354.3-239.8-277.4
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▁▆█▆▅▇▅▅▁▆15.60000000000003-273.5110.3250.089.452.6139.142.554.8-257.7120.6NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit █▇▇▇▇▆▇▇▇▄▇▇▇▇▁▇▇█50.417.816.230.1-0.3-19.221.23.55.5-86.020.812.45.313.4-203.924.320.735.3
us-gaap:NetCashProvidedByUsedInOperatingActivities █▅█▆▆▃▇▇▇▁▆▇█▅██▇▃362.0188.9382.5251.4289.885.6312.5307.4327.1-17.9264.4298.9372.3205.0369.9356.5321.9122.1
us-gaap:NetIncomeLoss ▅▆▅▅▄▄▄▅▅▁▂▅▅▆█▅▅▅109.0149.9115.971.330.7-15.622.586.3107.7-200.8-151.3124.9117.0153.0315.4125.4126.3122.5
us-gaap:ProfitLoss ▅▆▅▄▄▃▄▅▅▁▁▅▅▆█▆▅▅184.2214.1195.8127.863.540.095.9162.1180.2-133.0-98.8201.9205.2224.0393.8216.8204.4193.6
us-gaap:ShareBasedCompensation ▁█23.134.9NA25.232.724.8NA20.922.519.5NA27.719.430.1NA20.422.226.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▄▄▅▅▅█▂▄▅▅▅▄▅▅▅▅▅-146.6-24.1-45.7-11.1-12.815.9115.5-96.9-42.9-0.12.74.6-21.6-3.98.93.9-15.316.3
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▃▃▃▄▄▁▄▄▆▄▆▇▆█▄▅1.40.71.72.31.92.63.20.13.33.05.23.24.85.54.66.73.14.1
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▁▄█▅▇▃▅▄▄▆▄▃▃▃▂▄▄-201.1-440.9-233.94.8-188.6-37.7-300.5-163.8-226.7-243.7-141.4-245.9-282.7-313.1-318.2-354.3-239.8-277.4
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA0.0275.0349.8250.00.050.084.4336.3560.025.0125.0440.0100.0240.0130.075.0
us-gaap:RepaymentsOfLongTermDebt ▁▁▁▁▅▁▁▂▂▆█▂▂▆▃▅▃▃7.815.00.00.0350.00.00.050.075.0385.0579.161.5105.0435.0160.0360.0125.0160.0
us-gaap:PaymentsOfDividendsCommonStock ▁▁▁▁▁▇▇███0.40.50.50.50.515.315.716.216.417.0NANANANANANANANA
us-gaap:Dividends ▄▄0.50.5NA0.50.515.1NA16.416.616.8NA16.316.416.6NA11.311.411.5
us-gaap:PaymentsForRepurchaseOfCommonStock ▂█▃▃▁▂▃▂▂▂▂▃▄▅▃▃▂▂82.1312.8122.199.733.180.2132.781.670.871.078.7103.2150.8173.1116.8106.290.280.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0539000.0458000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5858585858585858585858585858585858585555555555555555555353535345
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4445464747505151555457585859565656575757585855565454535252535353514745
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4142464747505151535454555656535354545454555553535352515151515251514442
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

amg:EmployeeStockOptionsandRestrictedStock


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value300000.0400000.02900000.03200000.03300000.02300000.0600000.0600000.0200000.0200000.0100000.00200000.0200000.0500000.0200000.0700000.00100000.0100000.0200000.0200000.0300000.000
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.0

us-gaap:ConvertibleDebtSecurities


Antidilutive
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-06-302014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value2200000.02200000.02200000.02200000.02200000.02200000.002200000.0000001300000.03600000.03600000.03700000.03700000.04200000.03700000.03700000.04200000.03700000.03700000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount75.968.866.795.7366.7366.70.01100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value2.623.522.511.540.65-0.330.441.712.11-3.87-2.772.352.172.85.652.252.242.162.772.032.01.942.782.012.362.343.091.881.811.442.971.411.221.181.441.060.130.720.780.770.870.761.260.660.560.41
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
Value2.553.412.51.530.65-0.330.461.712.11-3.87-2.882.342.162.775.52.222.222.132.672.01.971.922.721.982.312.283.021.841.771.42.791.371.181.151.41.040.120.710.770.760.850.741.180.650.530.38
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

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value139.72115228.21911108.8111111101010109.48.510109.28.78.49.18.07.17.08.76.5115.55.45.5325.04.95.0184.53.63.8
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.31.73.83.24.81.63.52.11.71.62.01.91.81.71.71.81.81.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value118174172866.8-53.33856119-198.7-200.17111117334416814013610910457951442024193149831225416410045418870-15.05961-41.3445091571.042
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.131.231.117.51.4-10.57.010.320.2-36.6-35.511.918.528.457.028.824.625.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value74649065323993686574467473798096867341575764697244787477828294806866646354574840555045353335
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.611.416.313.36.87.816.812.511.013.78.212.312.313.013.416.515.113.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value19223826315239-13.9132125184-124.3-153.81451852534252652262101511621151602149228517222416120413725918011310815313439116110-1.399100136923478
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.842.647.430.98.3-2.723.822.831.2-22.9-27.324.230.841.470.445.339.738.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value255264234165664294192215-194.8-63.62502392872642822662532812262352302892492622903122552402083361871721671771376211710999127116146937564
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.547.342.333.414.28.317.035.136.5-35.9-11.341.639.946.943.748.346.846.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value705038373.32.2-1.53035-61.835483463-129.86662597451535658567269536461488731383737192.0241919262638241611
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.19.06.97.60.70.4-0.35.66.0-11.46.28.15.710.4-21.511.310.911.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities

srt:ParentCompany


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value624835321.10.2-6.02833-64.83046316064
Percentage of IncomeTaxExpenseBenefit87.795.893.286.733.39.1400.092.893.6104.987.295.392.795.797.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.68.76.56.60.20.0-1.15.25.6-11.95.47.75.39.910.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value8.72.12.65.02.22.04.52.22.33.04.52.32.52.72.32.01.81.92.30.22.01.9-3.32.62.93.34.33.53.43.34.1-0.62.1
Percentage of IncomeTaxExpenseBenefit12.34.26.813.366.790.9-300.07.26.4-4.912.84.77.34.3-1.83.02.93.23.10.43.83.4-5.74.64.04.78.15.55.56.74.7-1.95.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.50.40.51.00.50.40.80.40.40.60.80.40.40.40.40.30.30.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value26272623221918191918181921211921222123222122202322221919201718192424242118181818181917161616
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.64.94.84.84.73.83.43.63.33.43.23.33.63.53.23.73.94.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1091491157130-15.62286107-200.8-151.31241171533151251261221501091071041501091281281721041007715875646275546.6374040453962342517
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.626.820.914.46.5-3.14.115.718.2-37.0-26.820.819.525.052.221.422.122.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value75643255
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.811.57.011.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302020-06-30
Value10930
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.66.5

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value1131541157130-15.62286107-200.8-165.512911715731912913012615511311110815411213213118510810377168776475546.6404045623425
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 RevenueFromContractWithCustomerExcludingAssessedTax19.427.720.914.46.5-3.14.115.718.2-37.0-29.321.619.525.752.822.122.823.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value389378386359409354445373412387427421407435394366370367376373372366396397451403442416437399440382379351364327404308307287322301306258236182
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.567.769.872.686.969.880.168.069.771.475.770.167.971.165.362.664.867.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value7.5236624-23.2-52.935-37.65.27.5-54.6-56.4-20.22935532612-42.6-16.8-53.9-2.0-35.3-46.148-60.1-39.4-34.220-8.8-5.218-9.7-22.8-1.215-9.9148.0-34.6
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 RevenueFromContractWithCustomerExcludingAssessedTax1.34.312.05.0-4.9-10.46.4-6.80.91.4-9.7-9.4-3.44.85.99.04.72.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-12-312011-09-30
Value7.9246724-24.5-53.936-37.14.58.7-55.0-56.4-20.22931482216-56.2-12.7-67.6-13.9-16.4-99.895-48.7-31.7-29.825-22.41024-20.4-21.513162321-81.4
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.34.312.15.0-5.2-10.66.6-6.80.81.6-9.7-9.4-3.44.85.28.33.93.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7.5236624-23.2-52.935-37.65.27.5-54.6-56.4-20.22935532612-42.6-16.8-53.9
Percentage of OtherComprehensiveIncomeLossNetOfTax94.997.999.199.294.798.198.1101.3115.686.299.3100.0100.099.0113.6108.6120.672.675.8132.379.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.34.312.05.0-4.9-10.46.4-6.80.91.4-9.7-9.4-3.44.85.99.04.72.20.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.40.50.2-1.3-1.0-1.00.5-0.71.2-2.40.00.0
Percentage of OtherComprehensiveIncomeLossNetOfTax5.12.10.85.31.9-2.7-1.3-15.613.84.4-0.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.0-0.3-0.2-0.20.1-0.10.2-0.40.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value9.0245615-23.9-37.716-29.9112.1-48.9-53.4-5.82029431414-42.1-4.5-49.6-8.6-5.6-88.678-34.6-21.0-20.521-22.61024-19.4-21.113
Percentage of OtherComprehensiveIncomeLossNetOfTax113.9100.884.262.297.669.944.480.6262.224.188.994.728.771.192.788.764.184.574.935.473.461.934.188.882.471.066.268.885.5100.9101.9101.695.198.196.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.54.410.23.1-5.1-7.42.9-5.42.00.4-8.7-8.9-1.03.44.97.42.52.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1.1-0.2109.4-0.6-16.220-7.2-7.36.6-6.1-3.0-14.48.52.35.58.02.6-14.1-8.2-18.0-5.3-10.8-11.216-14.1-10.7-9.33.70.2-0.2-0.4-1.0-0.40.5
Percentage of OtherComprehensiveIncomeLossNetOfTax-13.9-0.815.837.82.430.155.619.4-162.275.911.15.371.328.97.311.335.915.525.164.626.638.165.911.217.629.033.831.214.5-0.9-1.9-1.64.91.93.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.01.91.9-0.1-3.23.7-1.3-1.21.2-1.1-0.5-2.41.40.40.91.40.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value184214195127634095162180-133.0-98.82012052243932162041932071741821742301921892202561911791592491561341291391186093898010189107695852
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.438.335.325.813.57.917.329.530.4-24.5-17.533.634.236.665.237.035.835.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Profit
Period End2020-09-302020-06-302019-09-302019-06-30
Value7412875238
Percentage of ProfitLoss58.1202.446.4132.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.027.313.740.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value756479563255737572675277887178917871556575698083619285867982918169676463545548405550
Percentage of ProfitLoss40.830.040.844.251.7139.076.446.840.2-51.0-53.138.143.031.719.942.238.236.726.937.641.239.934.943.332.242.033.445.444.151.636.551.951.951.946.153.589.259.854.849.955.056.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.811.514.411.47.011.013.213.812.212.59.312.814.711.613.015.613.713.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1091491157130-15.62286107-200.8-151.31241171533151251261221511091071041501091281281701041007715875646275546.63740404539
Percentage of ProfitLoss59.270.059.255.848.3-39.023.553.259.8151.0153.161.957.068.380.157.861.863.373.162.458.860.165.156.767.858.066.654.655.948.463.548.148.248.153.946.510.840.245.250.145.043.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.626.820.914.46.5-3.14.115.718.2-37.0-26.820.819.525.052.221.422.122.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value586559554494471507555549591543564601600612604585570544
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:Revenues

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Revenuesus-gaap:
Period End2020-09-302020-06-302019-09-302019-06-30
Value116460122519
Percentage of Revenues100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.597.722.387.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value887883747390939196951031021051061039189881119496951131071141081261141221221291069992999388858983908793737245
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.114.115.115.015.617.816.816.716.317.618.317.117.517.417.115.715.616.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value80217680788876697496748276537679772776778219853884908584870287018632859087498323803480917784753576787493769868846730662063186261607262256187603056145209521851315325525952913390
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestee


Assetsus-gaap:
Period End2020-12-312019-12-31
Value29582718
Percentage of Assets37.535.5
Percentage of Assets37.535.5
Percentage of Assets us-gaap:EquityMethodInvestee100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value41083762390036893472339132373198317431613250324831793220331134923531348736493515350536603403323432973205340926662545258425322644246026752668266323952226226722352346237725021540
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets51.249.049.448.146.345.342.341.741.141.239.538.037.437.538.140.140.940.641.742.243.645.243.742.942.942.844.338.737.839.040.142.240.543.043.144.242.742.743.443.644.145.247.345.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value80217680788876697496748276537679772776778219853884908584870287018632859087498323803480917784753576787493769868846730662063186261607262256187603056145209521851315325525952913390
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value26092651277928482854298029373070322531403457361836393677382236273600358436193182291828682837266026512557262725952545243021342032215421302084193118571862186618051833176117991109
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 Assets32.534.535.237.138.139.838.440.041.740.942.142.442.942.843.941.741.741.741.438.236.335.436.435.334.534.134.137.737.836.733.832.535.534.233.732.033.135.735.835.234.433.534.032.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value7777661039929681592539402360305565448392334439374364293430422360297563541488438550560374747469522413335430372311393449323311252313255220203259396222
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.710.013.212.19.17.97.15.24.74.06.95.24.63.95.14.34.23.44.95.14.53.77.27.26.45.87.28.15.611.37.48.36.85.47.06.25.57.68.66.35.84.85.90.00.00.07.70.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value7777661039929681592539402360305565448439430
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.710.013.212.19.17.97.15.24.74.06.95.25.14.9

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value255251250247234231199179169152140
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.33.12.82.73.02.62.82.72.92.6

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

amg:BuildingAndLeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1161161171111031048478745956
Percentage of PropertyPlantAndEquipmentGross45.746.347.045.244.245.342.243.644.138.840.1
Percentage of Assets1.51.51.41.31.21.31.11.21.21.11.1
Percentage of Assets amg:BuildingAndLeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2121212120221715162014
Percentage of PropertyPlantAndEquipmentGross8.28.58.48.78.99.78.88.69.613.510.5
Percentage of Assets0.30.30.30.20.20.30.20.20.30.40.3
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LandAndLandImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1817181817181818181717
Percentage of PropertyPlantAndEquipmentGross7.17.17.47.67.68.19.410.510.711.812.1
Percentage of Assets0.20.20.20.20.20.20.20.30.30.30.3
Percentage of Assets us-gaap:LandAndLandImprovements0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OfficeEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4443424439393836383433
Percentage of PropertyPlantAndEquipmentGross17.417.116.918.016.917.319.220.323.022.423.5
Percentage of Assets0.60.60.50.50.50.50.50.60.60.70.6
Percentage of Assets us-gaap:OfficeEquipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5552515052454030212019
Percentage of PropertyPlantAndEquipmentGross21.720.920.320.522.419.720.517.012.613.513.8
Percentage of Assets0.70.70.60.60.60.60.50.50.30.40.4
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value17515814613612411610487878372
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.11.81.61.41.51.41.41.41.61.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:AmortizationOfIntangibleAssets

us-gaap:CustomerRelationships


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value8.8999999999999997.57.17.035202121252626262930282738282827323232241143022
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:IncomeStatementLocation

us-gaap:CustomerRelationships, amg:IntangibleAmortizationandImpairments


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value8.97.57.02020212129302323212221262626
Percentage of AmortizationOfIntangibleAssets100.0100.0100.058.7100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerRelationships amg:IntangibleAmortizationandImpairments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value29353436394238232223302524211414
Percentage of AmortizationOfIntangibleAssets329.2469.3490.0105.1190.8199.50.00.00.00.00.00.00.00.052.055.4
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerRelationships us-gaap:EquityMethodInvestee0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7576798185889292991021041041091111111111091091101131121131141069794959395939288848381727070696465666762
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.01.01.11.11.21.21.21.31.31.31.21.31.31.31.31.31.31.31.41.41.41.51.41.31.31.21.41.41.41.51.41.41.31.31.21.31.31.31.31.21.31.31.8

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

amg:OTHER


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value0.80.91.51.82.93.23.3
Percentage of PropertyPlantAndEquipmentNet1.01.01.41.62.62.83.5
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets amg:OTHER0.00.00.00.00.00.00.0

country:GB


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value141515119.91211
Percentage of PropertyPlantAndEquipmentNet18.317.115.110.39.010.812.5
Percentage of Assets0.20.20.20.10.10.20.2
Percentage of Assets country:GB0.00.00.00.00.00.00.0

country:US


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value64758797979880
Percentage of PropertyPlantAndEquipmentNet80.781.983.588.188.486.484.1
Percentage of Assets0.81.01.11.11.11.31.0
Percentage of Assets country:US0.00.00.00.00.00.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2119199920741974199120382195235923302318279130553134317733043290327832983368279524502458193716691692167817831257127196311239829649841031935587599615603622622678658
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.426.026.325.726.627.228.730.730.230.234.035.836.937.038.037.838.038.438.533.630.530.424.922.222.022.423.218.318.914.517.815.715.915.816.715.510.511.511.811.811.711.812.819.4

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AchievementOfSpecifiedFinancialTargets, us-gaap:EquityMethodInvestee


Investments
Period End2020-12-31
Value40
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures1.9
Percentage of Assets0.5
Percentage of Assets amg:AchievementOfSpecifiedFinancialTargets us-gaap:EquityMethodInvestee0.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestee


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value211919992074197419912038219523592330231827913055313431773304329032783368
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.426.026.325.726.627.228.730.730.230.234.035.836.937.038.037.838.038.5
Percentage of Assets us-gaap:EquityMethodInvestee0.00.070.10.00.00.080.80.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value26692666266126382627262126512629263926422633264826482667266226612647263326282644265326722668264726702621265224742491238523412345233423422355235323422125211721162138214221311413
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.334.733.734.435.135.034.634.234.234.432.031.031.231.130.630.630.730.730.031.833.033.034.335.134.835.034.535.937.036.037.137.538.437.638.139.041.740.840.641.240.240.740.341.7

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:CustomerRelationships


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-31
Value9139119098899009479729941004101410061014101910431028102510141001995101310231054106510671088905918911864859667678
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.411.911.511.612.012.712.713.013.013.212.211.912.012.211.811.811.811.711.412.212.713.013.714.214.113.213.713.813.713.912.812.8
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1036104410481035105211331182122212571289130913571393144314491467147614821497154615841647168616991749172417781566160915611460148515021535158516151631129813211352138414091424571
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.913.613.313.514.015.215.415.916.316.815.915.916.416.816.716.917.117.317.118.619.720.421.722.622.823.023.122.823.923.623.123.724.724.725.626.829.124.925.326.326.026.826.916.9

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value103610441048103510521133118212221257128913091357139314431449146714761482149715461584164716861724177815661609156114601585
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.913.613.313.514.015.215.415.916.316.815.915.916.416.816.716.917.117.317.118.619.720.421.723.023.122.823.923.623.125.6
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302011-12-312010-12-31
Value123132139145151186209228252275303342373400421441461481501532561593621623657657690660690650596726757653742
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.71.81.92.02.52.73.03.33.63.74.04.44.74.85.15.35.65.76.47.07.38.08.38.68.89.09.610.39.89.411.712.612.514.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value230304945854605961575654747371727177837890107
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.94.01.10.70.60.70.70.70.70.70.71.01.00.91.00.91.11.21.21.41.7

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value22992303231223102042204417931792179117807791534157615568098687887838688738981063645410475535855250300400525325
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.730.029.330.127.327.323.423.323.223.29.518.018.618.19.310.09.19.19.910.511.213.18.35.46.27.111.13.64.56.08.35.3

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

amg:JuniorConvertibleTrustPreferredSecurities, us-gaap:ConvertibleDebtSecurities


Long
Period End2021-06-302021-03-31
Value304308
Percentage of LongTermDebt13.213.4
Percentage of Assets3.84.0
Percentage of Assets amg:JuniorConvertibleTrustPreferredSecurities us-gaap:ConvertibleDebtSecurities0.00.0

amg:SeniorUnsecuredTermLoan, us-gaap:UnsecuredDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value350450450385
Percentage of LongTermDebt15.125.157.747.6
Percentage of Assets4.45.95.54.4
Percentage of Assets amg:SeniorUnsecuredTermLoan us-gaap:UnsecuredDebt0.00.00.00.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:ConvertibleDebtSecurities


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value556304314313312311310309309308307
Percentage of LongTermDebt24.213.213.613.515.315.217.317.317.217.339.4
Percentage of Assets6.94.04.04.14.24.24.14.04.04.03.7
Percentage of Assets us-gaap:ConvertibleDebtSecurities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:JuniorSubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3005565565562892892892892892700.0
Percentage of LongTermDebt13.124.224.124.114.214.216.216.216.215.20.0
Percentage of Assets3.77.27.17.33.93.93.83.83.73.50.0
Percentage of Assets us-gaap:JuniorSubordinatedDebt0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value10921092109110911091744743743743742742
Percentage of LongTermDebt47.547.447.247.253.436.441.541.541.541.795.2
Percentage of Assets13.614.213.814.214.69.99.79.79.69.79.0
Percentage of Assets us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnsecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value349349349349349699449449449459779
Percentage of LongTermDebt15.215.215.115.117.134.225.125.125.125.8100.0
Percentage of Assets4.44.64.44.64.79.45.95.95.86.09.5
Percentage of Assets us-gaap:UnsecuredDebt0.00.00.00.00.00.00.00.00.00.00.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value497432423400388393450411421418511479471474467
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.25.65.45.25.25.35.95.45.55.56.25.65.65.55.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value36
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value32
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value25
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value21
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value59
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.8

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value216
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets2.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value34
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.4

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value26092651277928482854298029373070322531403457361836393677382236273600358436193182291828682837266026512557262725952545243021342032215421302084193118571862186618051833176117991109
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 Assets32.534.535.237.138.139.838.440.041.740.942.142.442.942.843.941.741.741.741.438.236.335.436.435.334.534.134.137.737.836.733.832.535.534.233.732.033.135.735.835.234.433.534.032.7

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302009-12-312008-12-312007-12-31
Value3157318733173328334135083499363338253760413443214357442245784404437043694426402937843772376936053636354436433513350633753144300230923038304128542737247324992440246023512382246014811170430
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.441.542.143.444.646.945.747.349.549.050.350.651.351.552.650.650.650.950.648.447.146.648.447.947.447.347.351.052.151.049.848.050.948.849.247.348.847.547.947.646.244.745.00.043.70.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-130.6-138.1-161.9-228.5-253.2-230.0-177.1-212.9-175.3-180.5-188.0-133.4-77.0-56.8-85.9-121.8-174.8-201.7-213.9-98.6
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-4.1-4.3-4.9-6.9-7.6-6.6-5.1-5.9-4.6-4.8-4.5-3.1-1.8-1.3-1.9-2.8-4.0-4.6-4.8-2.6
Percentage of Assets-1.6-1.8-2.1-3.0-3.4-3.1-2.3-2.8-2.3-2.4-2.3-1.6-0.9-0.7-1.0-1.4-2.0-2.3-2.4-1.3
Percentage of Assets us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-31
Value0.60.2-0.3-0.9-1.10.20.00.5-0.52.1
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.0-0.0-0.0-0.00.00.00.0-0.00.0
Percentage of Assets0.00.0-0.0-0.0-0.00.00.00.0-0.00.0
Percentage of Assets us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2020-12-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-0.31.20.00.7-0.5-0.1-0.1-0.1-0.4-0.4-0.50.10.40.3
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.0
Percentage of Assets-0.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-64.8-73.8-98.3-154.9-170.4-146.5-108.8-125.0-95.1-106.9-109.0-60.1-6.7-0.9-21.8-51.1-94.4-108.7-122.9-80.8-76.3-26.7-18.1-12.576-2.8315273517463385879665071502911011110045-4.08164
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-2.1-2.3-3.0-4.7-5.1-4.2-3.1-3.4-2.5-2.8-2.6-1.4-0.2-0.0-0.5-1.2-2.2-2.5-2.8-2.0-2.0-0.7-0.5-0.32.1-0.10.91.52.11.52.42.11.21.92.62.31.82.92.01.24.54.84.23.1-0.315.0
Percentage of Assets-0.8-1.0-1.2-2.0-2.3-2.0-1.4-1.6-1.2-1.4-1.3-0.7-0.1-0.0-0.3-0.6-1.1-1.3-1.4-1.0-0.9-0.3-0.2-0.21.0-0.00.40.81.10.81.21.00.60.91.31.10.91.41.00.62.12.11.91.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value5396197287647688607077428358048357076796648088499129251073773527541597540501519672631649691479548781817868855898876927929866854980612817278
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest17.119.422.023.023.024.520.220.421.821.420.216.415.615.017.719.320.921.224.319.213.914.415.815.013.814.618.518.018.520.515.318.325.326.928.630.032.835.437.138.135.236.341.241.369.864.7
Percentage of Assets6.78.19.210.010.211.59.29.710.810.510.28.38.07.79.39.810.610.812.39.36.66.77.77.26.56.98.79.29.610.47.68.812.913.114.014.216.016.817.818.116.316.218.518.10.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value-130.0-137.9-162.2-229.4-254.3-229.8-175.9-212.4-175.3-179.8-188.5-133.5-77.1-56.9-84.2-115.8-164.6-186.9-203.7-53.315
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-4.1-4.3-4.9-6.9-7.6-6.5-5.0-5.8-4.6-4.8-4.6-3.1-1.8-1.3-1.8-2.6-3.8-4.3-4.6-1.40.4
Percentage of Assets-1.6-1.8-2.1-3.0-3.4-3.1-2.3-2.8-2.3-2.3-2.3-1.6-0.9-0.7-1.0-1.3-1.9-2.2-2.3-0.70.2
Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value0.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.50.50.50.50.50.50.50.50.50.50.50.50.5390.4580.4580.39
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value54853653747948752856156360061967770371874575677677078480684786590493294598598710169189609451010970937907957923879611633634626589582281180239
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest17.416.816.214.414.615.116.015.515.716.516.416.316.516.916.517.617.617.918.221.022.924.024.726.227.127.827.926.127.428.032.132.330.329.931.532.432.124.725.326.025.525.124.419.015.455.6
Percentage of Assets6.87.06.86.36.57.17.37.37.88.18.28.28.58.78.78.98.99.19.210.210.811.212.012.512.813.213.213.314.314.316.015.515.414.615.515.315.711.712.112.411.811.211.08.30.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value4263415440053890381937893819381337433652387640443935383436983394328031653054290228912783267925292420229121631992188817881711155314771413135012751220121411761136109610501011873813814
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest135.0130.4120.7116.9114.3108.0109.2105.097.997.193.893.690.386.780.877.175.172.569.072.076.473.871.170.166.564.659.456.753.953.054.451.747.846.544.444.744.649.147.146.644.644.742.558.969.5189.3
Percentage of Assets53.154.150.850.751.050.649.949.748.447.647.247.446.444.742.539.038.036.834.934.936.034.434.433.631.530.628.128.928.127.027.124.824.322.721.821.221.723.322.522.120.620.019.125.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-2128.9-2050.2-1857.0-1651.0-1563.0-1523.9-1481.3-1361.8-1259.7-1210.3-1146.6-1074.3-969.8-821.8-663.7-566.1-498.8-397.6-386.0-413.5-424.6-430.8-421.9-396.9-346.9-250.5-240.9-81.8-65.4-101.6-131.4-132.6-143.6-158.4-214.6-266.4-312.2-300.1-288.7-290.0-239.9-256.7-293.279-421.954-702.953-1094.805
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-67.4-64.3-56.0-49.6-46.8-43.4-42.3-37.5-32.9-32.2-27.7-24.9-22.3-18.6-14.5-12.9-11.4-9.1-8.7-10.3-11.2-11.4-11.2-11.0-9.5-7.1-6.6-2.3-1.9-3.0-4.2-4.4-4.6-5.2-7.1-9.3-11.4-12.1-11.5-11.9-9.7-10.9-12.3-28.5-60.0-254.3
Percentage of Assets-26.5-26.7-23.5-21.5-20.9-20.4-19.4-17.7-16.3-15.8-14.0-12.6-11.4-9.6-7.6-6.5-5.8-4.6-4.4-5.0-5.3-5.3-5.4-5.3-4.5-3.3-3.1-1.2-1.0-1.5-2.1-2.1-2.4-2.5-3.5-4.4-5.6-5.8-5.5-5.7-4.5-4.9-5.5-12.40.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0600000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0539000.0458000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5396197287647688607077428358048357076796648088499129251073773527541597540501519672631649691479548781817868855898876927929866854980612
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.78.19.210.010.211.59.29.710.810.510.28.38.07.79.39.810.610.812.39.36.66.77.77.26.56.98.79.29.610.47.68.812.913.114.014.216.016.817.818.116.316.218.518.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4263415440053890381937893819381337433652387640443935383436983394328031653054290228912783267925292420229121631992188817881711155314771413135012751220121411761136109610501011873
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.154.150.850.751.050.649.949.748.447.647.247.446.444.742.539.038.036.834.934.936.034.434.433.631.530.628.128.928.127.027.124.824.322.721.821.221.723.322.522.120.620.019.125.7

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2128205018571651156315231481136112591210114610749698216635664983973864134244304213963462502408165101131132143158214266312300288290239256293421
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.526.723.521.520.920.419.417.716.315.814.012.611.49.67.66.55.84.64.45.05.35.35.45.34.53.33.11.21.01.52.12.12.42.53.54.45.65.85.55.74.54.95.512.4

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value139.72115228.21911108.8111111101010109.48.510109.28.78.59.08.07.17.08.76.5319.29.510248.58.38.1177.87.47.5
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value139.72115228.21911108.8111111101010109.48.510109.28.78.59.08.07.17.08.76.5319.29.510248.58.38.1177.87.47.5
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value901025777729971838810476889211285888692848187101941061151141011221262194839531254519348555361369
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value901025777729971838810476889211285888692848187101941061151141011221262194839531254519348555361369
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312011-06-302011-03-312010-06-302010-03-31
Value36218838225128985312307327-17.92642983722053693563211223443413152535218013011568
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.733.869.050.861.516.956.356.055.3-3.346.849.762.033.561.260.956.422.40.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312011-06-302011-03-312010-06-302010-03-31
Value-146.6-24.1-45.7-11.1-12.815115-96.9-42.9-0.12.74.6-21.6-3.98.93.9-15.316-463.5-328.710-550.9-262.1-5.1-12.1-682.9-131.9
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-25.0-4.3-8.2-2.2-2.73.120.8-17.7-7.2-0.00.50.8-3.6-0.61.50.7-2.73.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312011-06-302011-03-312010-06-302010-03-31
Value-201.1-440.9-233.94.8-188.6-37.7-300.5-163.8-226.7-243.7-141.4-245.9-282.7-313.1-318.2-354.3-239.8-277.416252-274.2259-62.8-117.0-180.85867.6
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-34.3-78.9-42.21.0-40.0-7.4-54.1-29.8-38.3-44.9-25.1-40.9-47.1-51.1-52.7-60.5-42.0-51.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value15-273.511025089521394254-257.7120
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.7-48.919.950.519.010.425.07.79.3-47.421.4

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value50171630-0.3-19.2213.55.5-86.020125.313-203.9242035-10.519222717172534131815153.7-4.816125.37.9-15.5133.4147.49.6116.69.08.6
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value6.00.00.01.90.0-0.10.0-0.1-0.1-0.1-0.1-0.10.0-0.10.0-0.1-0.1-0.1-0.2-1.3-0.2-0.2-3.7-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-3.7-0.2
Percentage of DeferredIncomeTaxExpenseBenefit11.90.00.06.3-0.00.50.0-2.9-1.80.1-0.5-0.80.0-0.7-0.0-0.4-0.5-0.31.9-6.7-0.9-0.7-20.9-1.2-0.8-0.6-1.5-1.1-1.3-1.3-5.477.1-1.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312011-06-302011-03-312010-06-302010-03-31
Value36218838225128985312307327-17.92642983722053693563211223443413152535218013011568
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.733.869.050.861.516.956.356.055.3-3.346.849.762.033.561.260.956.422.40.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1091491157130-15.62286107-200.8-151.31241171533151251261221501091071041501091281281721041007715875646275546.6374040453962342517
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.626.820.914.46.5-3.14.115.718.2-37.0-26.820.819.525.052.221.422.122.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value184214195127634095162180-133.0-98.82012052243932162041932071741821742301921892202561911791592491561341291391186093898010189107695852
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.438.335.325.813.57.917.329.530.4-24.5-17.533.634.236.665.237.035.835.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Profit
Period End2020-09-302020-06-302019-09-302019-06-30
Value7412875238
Percentage of ProfitLoss58.1202.446.4132.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.027.313.740.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value756479563255737572675277887178917871556575698083619285867982918169676463545548405550
Percentage of ProfitLoss40.830.040.844.251.7139.076.446.840.2-51.0-53.138.143.031.719.942.238.236.726.937.641.239.934.943.332.242.033.445.444.151.636.551.951.951.946.153.589.259.854.849.955.056.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.811.514.411.47.011.013.213.812.212.59.312.814.711.613.015.613.713.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1091491157130-15.62286107-200.8-151.31241171533151251261221511091071041501091281281701041007715875646275546.63740404539
Percentage of ProfitLoss59.270.059.255.848.3-39.023.553.259.8151.0153.161.957.068.380.157.861.863.373.162.458.860.165.156.767.858.066.654.655.948.463.548.148.248.153.946.510.840.245.250.145.043.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.626.820.914.46.5-3.14.115.718.2-37.0-26.820.819.525.052.221.422.122.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value23342532242022192719302022263218151817491731214714579.08.88.9238.07.98.2117.35.96.19.133.63.23.6
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312011-06-302011-03-312010-06-302010-03-31
Value-146.6-24.1-45.7-11.1-12.815115-96.9-42.9-0.12.74.6-21.6-3.98.93.9-15.316-463.5-328.710-550.9-262.1-5.1-12.1-682.9-131.9
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-25.0-4.3-8.2-2.2-2.73.120.8-17.7-7.2-0.00.50.8-3.6-0.61.50.7-2.73.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.40.71.72.31.92.63.20.13.33.05.23.24.85.54.66.73.14.15.16.54.54.112137.04.75.53.26.44.18.17.14.34.6104.93.71.37.83.92.71.73.3622.22.01.1
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312011-06-302011-03-312010-06-302010-03-31
Value-201.1-440.9-233.94.8-188.6-37.7-300.5-163.8-226.7-243.7-141.4-245.9-282.7-313.1-318.2-354.3-239.8-277.416252-274.2259-62.8-117.0-180.85867.6
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-34.3-78.9-42.21.0-40.0-7.4-54.1-29.8-38.3-44.9-25.1-40.9-47.1-51.1-52.7-60.5-42.0-51.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.02753492500.050843365602512544010024013075
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.8150.00.03500.00.0507538557961105435160360125160
Percentage of RepaymentsOfLongTermDebt100.0100.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

amg:JuniorConvertibleTrustPreferredSecurities, us-gaap:ConvertibleDebtSecurities


Repayments
Period End2021-06-302021-03-31
Value7.815
Percentage of RepaymentsOfLongTermDebt100.0100.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.40.50.50.50.51515161617
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.50.50.50.515161616161616111111
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.50.50.50.515161616161616111111
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-30
Value823121229933801328170717810315017311610690800.00.016163464117197139510.00.00.0150.00.00.0281348
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-03-312020-03-31
Value24.4-1.0
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0

us-gaap:EffectiveIncomeTaxRateContinuingOperations us-gaap:ConsolidatedEntities

srt:ParentCompany


Effective
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value36.3-2.531.30.034-168.524.70.237
Percentage of EffectiveIncomeTaxRateContinuingOperations0.00.00.00.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312011-09-302011-06-302010-12-31
Value2700000.02800000.02900000.02500000.02500000.02500000.02300000.02300000.0500000.0500000.0500000.0500000.0600000.0600000.01400000.05200000.04700000.05100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312011-09-302011-06-302010-12-31
Value79.6681.6282.1484.0384.3584.5385.5886.25130.58130.54130.81130.3125.16122.04108.5367.4563.7562.34
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value0200000.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0100.00.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value417434511467702677666660652610599565547572524491440424399456530572574568578555572554550557536
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value61755332705872646966707156524748604940
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value63653332262628202221242121
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value35162424222018362423222127303435363638
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:IncomeTaxAuthority, us-gaap:ValuationAllowanceByDeferredTaxAsset

us-gaap:ForeignCountry, us-gaap:ValuationAllowanceOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312017-12-312016-12-31
Value132.32422
Percentage of DeferredTaxAssetsValuationAllowance37.413.6100.0100.0

us-gaap:ForeignCountry, us-gaap:ValuationAllowanceTaxCreditCarryforward


Deferred
Period End2020-12-31
Value8.2
Percentage of DeferredTaxAssetsValuationAllowance23.0

us-gaap:StateAndLocalJurisdiction, us-gaap:ValuationAllowanceOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-31
Value1412
Percentage of DeferredTaxAssetsValuationAllowance39.671.0

amg:AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests

amg:AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value170.50.5-2.90.01.30.31.90.20.71.20.52.31.00.40.3-0.91.25.3-2.5-0.9-17.4-28.6-3.0-16.2-3.62.8-16.3-50.90.9-19.3-4.8-36.51.1-2.6-6.0-23.5-5.1-3.43.8-12.9-12.8-3.3
Percentage of AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests

amg:AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests


Adjustmentsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value8.24713655.5155127.613174.131-1.03334121652142.13.8174016293.5
Percentage of AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AffiliateEquityCompensationExpenseAttributabletoNoncontrollingInterest us-gaap:StatementEquityComponents

amg:AffiliateEquityCompensationExpenseAttributabletoNoncontrollingInterest

us-gaap:NoncontrollingInterest


Affiliate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value6.8206.06.05.1136.06.99.68.56.99.96.1167.67.78.8124.0184.8
Percentage of AffiliateEquityCompensationExpenseAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest

amg:AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest


Affiliate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value9.525159.510168.39.2121012168.31911101116236.35.2
Percentage of AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Affiliate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value2.74.49.53.55.12.82.32.32.82.25.86.12.22.63.82.33.14.04.91.51.3
Percentage of AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest28.417.561.336.850.016.927.725.022.620.645.738.126.513.433.322.826.124.120.923.825.0

us-gaap:NoncontrollingInterest


Affiliate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value6.8206.06.05.1136.06.99.68.56.99.96.1167.67.88.812184.83.9
Percentage of AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest71.682.538.763.250.083.172.375.077.479.454.361.973.586.666.777.273.975.979.176.275.0

amg:AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest

amg:AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest


Affiliate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9.525159.510168.39.2121012168.3191110.011166.3216.35.22.89.2397.8
Percentage of AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AmortizationandImpairmentsofIntangibleAssets

amg:AmortizationandImpairmentsofIntangibleAssets


Amortizationand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value8.97.57.1318020722121
Percentage of AmortizationandImpairmentsofIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AmortizationandImpairmentsofIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Amortizationand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value8.8999999999999997.57.13180207221
Percentage of AmortizationandImpairmentsofIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0

amg:CompensationExpensesRelatedToAffiliateEquity us-gaap:RelatedPartyTransactionsByRelatedParty

amg:CompensationExpensesRelatedToAffiliateEquity

srt:AffiliatedEntity


Compensation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.74.49.53.55.12.82.32.32.82.25.86.12.22.63.82.3
Percentage of CompensationExpensesRelatedToAffiliateEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DeferredIncomeTaxExpenseRelatedToIntangibles us-gaap:ConsolidatedEntities

amg:DeferredIncomeTaxExpenseRelatedToIntangibles

srt:ParentCompany


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value318.9-2.827-3.1-31.0323.56.6-93.849124.71322
Percentage of DeferredIncomeTaxExpenseRelatedToIntangibles100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DeferredTaxLiabilitiesNetDecreaseResultingFromRepurchaseOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

amg:DeferredTaxLiabilitiesNetDecreaseResultingFromRepurchaseOfDebt

amg:JuniorConvertibleTrustPreferredSecurities, us-gaap:ConvertibleDebtSecurities


Deferred
Period End2021-06-302021-03-31
Value1600000.03300000.0
Percentage of DeferredTaxLiabilitiesNetDecreaseResultingFromRepurchaseOfDebt100.0100.0

amg:DepreciationAndOtherAmortization

amg:DepreciationAndOtherAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.14.34.44.65.05.14.66.25.35.25.55.35.75.55.44.84.95.24.55.05.05.05.34.54.64.44.64.54.13.83.73.43.33.53.53.53.63.43.44.03.83.83.9763.73.43.0
Percentage of DepreciationAndOtherAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:EquityMethodInvestmentIntangibleAssetAmortizationandImpairments us-gaap:RelatedPartyTransactionsByRelatedParty

amg:EquityMethodInvestmentIntangibleAssetAmortizationandImpairments

us-gaap:EquityMethodInvestee


Equity
Period End2021-06-302021-03-312020-12-31
Value293581
Percentage of EquityMethodInvestmentIntangibleAssetAmortizationandImpairments100.0100.0100.0

amg:EquityMethodInvestmentOtherIncreaseDecrease us-gaap:RelatedPartyTransactionsByRelatedParty

amg:EquityMethodInvestmentOtherIncreaseDecrease

us-gaap:EquityMethodInvestee


Equity
Period End2021-06-302021-03-312020-12-31
Value-12.93.8-36.0
Percentage of EquityMethodInvestmentOtherIncreaseDecrease100.0100.0100.0

amg:EquityMethodInvestmentRealizedGainLossonForeignCurrencyTranslation us-gaap:RelatedPartyTransactionsByRelatedParty

amg:EquityMethodInvestmentRealizedGainLossonForeignCurrencyTranslation

us-gaap:EquityMethodInvestee


Equity
Period End2021-06-302021-03-312020-12-31
Value5.42326
Percentage of EquityMethodInvestmentRealizedGainLossonForeignCurrencyTranslation100.0100.0100.0

amg:FairValueAssumptionsAverageProjectedGrowthRate us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FairValueAssumptionsAverageProjectedGrowthRate

us-gaap:CustomerRelationships


Fair
Period End2020-09-30
Value-14.0
Percentage of FairValueAssumptionsAverageProjectedGrowthRate100.0

amg:FairValueAssumptionsAverageProjectedGrowthRate us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty

srt:Maximum, us-gaap:EquityMethodInvestee


Fair
Period End2020-12-31
Value-5.0
Percentage of FairValueAssumptionsAverageProjectedGrowthRate0.0

amg:FairValueAssumptionsDiscountRateForAssetsBasedFees us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FairValueAssumptionsDiscountRateForAssetsBasedFees

us-gaap:CustomerRelationships


Fair
Period End2020-09-30
Value15.0
Percentage of FairValueAssumptionsDiscountRateForAssetsBasedFees100.0

amg:FairValueAssumptionsMarketParticipantTaxRate us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FairValueAssumptionsMarketParticipantTaxRate

us-gaap:CustomerRelationships


Fair
Period End2020-09-30
Value25.0
Percentage of FairValueAssumptionsMarketParticipantTaxRate100.0

amg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesAndIssuances us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass

amg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesAndIssuances

us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties


Fair
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value127085131941218
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesAndIssuances100.0100.0100.0100.0100.0100.0100.0

amg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAndReductions us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass

amg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAndReductions

us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties


Fair
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value31278952973336
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAndReductions100.0100.0100.0100.0100.0100.0100.0

amg:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedinEarningsandOtherComprehensiveIncomeLoss us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass

amg:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedinEarningsandOtherComprehensiveIncomeLoss

us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties


Fair
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value-1300000.0-900000.0200000.02400000.01500000.0-700000.0100000.0
Percentage of FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedinEarningsandOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.0

amg:FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-31
Value2300000.01200000.0
Percentage of FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation100.0100.0

amg:FiniteLivedIntangibleAssetsAccumulatedAmortizationTransfers us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FiniteLivedIntangibleAssetsAccumulatedAmortizationTransfers

us-gaap:CustomerRelationships


Finite
Period End2020-12-31
Value0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortizationTransfers0.0

amg:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossBeforeAdjustmentOnAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossBeforeAdjustmentOnAccumulatedAmortization

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-31
Value2500000.01400000.06700000.0
Percentage of FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossBeforeAdjustmentOnAccumulatedAmortization100.0100.0100.0

amg:FiniteLivedIntangibleAssetsGrossTransfers us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:FiniteLivedIntangibleAssetsGrossTransfers

us-gaap:CustomerRelationships


Finite
Period End2020-12-31
Value0
Percentage of FiniteLivedIntangibleAssetsGrossTransfers0.0

amg:GainLossOnDerivativeUsedInCashFlowHedgeAndNetInvestmentHedgeAfterTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

amg:GainLossOnDerivativeUsedInCashFlowHedgeAndNetInvestmentHedgeAfterTax

us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Gain
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value500000.0200000.0100000.0200000.0100000.0400000.00300000.0-100000.0
Percentage of GainLossOnDerivativeUsedInCashFlowHedgeAndNetInvestmentHedgeAfterTax100.0100.0100.0100.0100.0100.00.0100.0100.0

amg:IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent

amg:IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent


Income
Period End2021-03-312020-03-31
Value198-15.4
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent100.0100.0

amg:IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent us-gaap:ConsolidatedEntities

srt:ParentCompany


Income
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value17115110331-15.416114141-265.6-120.6171148213189
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent0.00.00.00.0100.00.00.00.00.00.00.00.00.00.0

amg:IncomeLossfromEquityMethodInvestmentsBeforeAmortizationofIntangibles us-gaap:RelatedPartyTransactionsByRelatedParty

amg:IncomeLossfromEquityMethodInvestmentsBeforeAmortizationofIntangibles

us-gaap:EquityMethodInvestee


Income
Period End2021-06-302021-03-312020-12-31
Value6686116
Percentage of IncomeLossfromEquityMethodInvestmentsBeforeAmortizationofIntangibles100.0100.0100.0

amg:IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests

amg:IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value831011028.825-172.09.67694-218.8-156.6921151182801121106813611210186110911001251541001026010776455738564.03116354242492121
Percentage of IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:IntangibleAssetsNetExcludingGoodwillTranslationAdjustments us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:IntangibleAssetsNetExcludingGoodwillTranslationAdjustments

us-gaap:CustomerRelationships


Intangible
Period End2021-06-302021-03-312020-12-31
Value1.43.020
Percentage of IntangibleAssetsNetExcludingGoodwillTranslationAdjustments100.0100.0100.0

amg:InvestmentAndOtherIncomeLoss

amg:InvestmentAndOtherIncomeLoss


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21323112-12.12.4-47.26.77.28.0-64.1111114151515137.111114.0-1.3-0.1160.84.12.68.48.2208.07.54.51.76.93.0101.8-9.5-6.18.78.005110.72.8
Percentage of InvestmentAndOtherIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders

amg:NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3.30.5-13.40.20.35.119317.147146.6184.9209.621254.318145.71115139.4
Percentage of NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3.30.5-13.40.20.35.119317.147146.6184.9209.621254.318145.71115139.4
Percentage of NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:NoncontrollingInterestDecreasefromTransferstoOtherLiabilities

amg:NoncontrollingInterestDecreasefromTransferstoOtherLiabilities


Noncontrolling
Period End2021-06-302021-03-312020-12-31
Value127017
Percentage of NoncontrollingInterestDecreasefromTransferstoOtherLiabilities100.0100.0100.0

amg:NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests

amg:NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-3.327-88.118-9.534-14.53.93.14.6-17.5-2.9-0.314-69.20.8-0.434-29.71.34.68.5
Percentage of NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-3.311-116.1211.734-24.83.93.14.6-32.63.2-0.314-75.20.8-0.434-28.91.44.18.5
Percentage of NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests100.042.5131.8111.7-17.9100.0171.0100.0100.0100.0186.3-110.3100.0100.0108.7100.0100.0100.097.3107.789.1100.0

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302017-03-312016-12-312016-09-30
Value0.11528-2.2-11.215-6.10.0-0.8-0.1
Percentage of NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests-3.057.5-31.8-11.7117.9-86.3210.30.02.7-7.7

amg:NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships

amg:NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships


Noncontrolling
Period End2021-06-302021-03-312020-12-31
Value-38.1239.9
Percentage of NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships100.0100.0100.0

amg:NoncontrollingInterestIncreasefromContributionsfromAffiliate

amg:NoncontrollingInterestIncreasefromContributionsfromAffiliate


Noncontrolling
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6.00.00.00.04.9-0.70.00.00.4141.20.61.91.8-1.1-1.06.62.01.7-3.64.61.33.9-4.110
Percentage of NoncontrollingInterestIncreasefromContributionsfromAffiliate100.00.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:NoncontrollingInterestIncreasefromContributionsfromAffiliate us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6.00.00.00.04.9-0.70.00.00.4141.20.61.91.8-1.1-1.06.62.01.7-3.64.61.33.9-4.110
Percentage of NoncontrollingInterestIncreasefromContributionsfromAffiliate100.00.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:ObligationsAndPaymentsToAcquireInterestInSubsidiariesAndAffiliates us-gaap:RelatedPartyTransactionsByRelatedParty

amg:ObligationsAndPaymentsToAcquireInterestInSubsidiariesAndAffiliates

us-gaap:EquityMethodInvestee


Obligations
Period End2021-06-302021-03-31
Value13211
Percentage of ObligationsAndPaymentsToAcquireInterestInSubsidiariesAndAffiliates100.0100.0

amg:OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

amg:OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.60.70.3-1.715-18.76.96.7-6.4
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:HedgingDesignation

amg:OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302020-06-30
Value0.4-1.7
Percentage of OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0

amg:OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:HedgingDesignation

amg:OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302020-06-30
Value500000.0200000.0
Percentage of OtherComprehensiveIncomeLossNetInvestmentAndCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0

amg:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

amg:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:CallOption, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.00.0-1.33.5-7.5-7.6-7.5
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent0.00.00.0100.0100.0100.0100.0100.0

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.10.50.4-0.565-54.32226-16.8
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent0.00.00.00.0-5000.0-1551.4-304.0-350.0224.0

us-gaap:PutOption, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.00.0-47.732-8.4-12.317
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationAndTaxParent0.00.00.03669.2917.1112.0161.8-238.7

amg:ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases

amg:ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-29.8-15.0-62.4-89.0-59.1-84.4-60.7-32.9-35.9-6.0-15.7-47.1-42.6-8.3-53.2-35.4-59.5-17.6-33.71.4-17.6-54.1-34.9-60.6-12.0-13.1-20.9-11.4-33.60.2-111.4-11.7-11.015-82.8-2.2-6.1-16.9-6.7-6.88.0-7.8-19.575-6.6-6.9-102.6
Percentage of ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts

amg:PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts


Purchasesof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value114826183826420.00.00.012047139.910.07.77.39.123202417
Percentage of PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:RedeemableNoncontrollingInterestEquityChangeInRedemptionValue

amg:RedeemableNoncontrollingInterestEquityChangeInRedemptionValue


Redeemable
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value-72.2-105.6-50.7-110.9143-101.516
Percentage of RedeemableNoncontrollingInterestEquityChangeInRedemptionValue100.0100.0100.0100.0100.0100.0100.0

amg:RedeemableNoncontrollingInterestEquityChangeInRedemptionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Redeemable
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value-72.2-105.6-50.7-110.9143-101.516
Percentage of RedeemableNoncontrollingInterestEquityChangeInRedemptionValue100.0100.0100.0100.0100.0100.0100.0

amg:SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts

amg:SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts


Saleof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value152322153725112.31.71.5205.511126.78.27.97.123192316
Percentage of SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceConditionChangesWeightedAverageGrantDateFairValue us-gaap:AwardType

amg:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceConditionChangesWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-302021-03-31
Value0110.02
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceConditionChangesWeightedAverageGrantDateFairValue0.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt


Adjustments
Period End2021-06-302021-03-31
Value-1900000.0-2900000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

amg:JuniorConvertibleTrustPreferredSecurities, us-gaap:ConvertibleDebtSecurities, us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-31
Value-1900000.0-2900000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-31
Value-1900000.0-2900000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.0

us-gaap:CashDivestedFromDeconsolidation

us-gaap:CashDivestedFromDeconsolidation


Cash
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value02200000.0002000000.0002600000.03200000.0000
Percentage of CashDivestedFromDeconsolidation0.0100.00.00.0100.00.00.0100.0100.00.00.00.0

us-gaap:CurrentIncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities

us-gaap:CurrentIncomeTaxExpenseBenefit

srt:ParentCompany


Current
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value1730194.41.319-27.22427219.833264739
Percentage of CurrentIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentIncomeTaxExpenseBenefit us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Current
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value2.72.12.63.12.22.14.52.32.43.14.62.42.52.82.32.11.92.02.51.52.22.10.42.83.13.54.53.73.63.54.33.12.3
Percentage of CurrentIncomeTaxExpenseBenefit15.26.913.370.5169.210.9-16.59.38.614.746.97.19.55.90.05.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet

amg:JuniorConvertibleTrustPreferredSecurities, us-gaap:ConvertibleDebtSecurities


Debt
Period End2021-06-302021-03-31
Value-5100000.0-10300000.0
Percentage of DebtInstrumentIncreaseDecreaseForPeriodNet100.0100.0

us-gaap:DeferredOtherTaxExpenseBenefit us-gaap:ConsolidatedEntities

us-gaap:DeferredOtherTaxExpenseBenefit

srt:ParentCompany


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value138.9191.12.911-11.10.1-1.17.9-28.70.20.70.31.6
Percentage of DeferredOtherTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.32.67.44.91.0-11.211-4.2-2.74.0-5.1
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2.22.21.92.94.11.51.52.02.51.82.82.92.82.72.14.04.03.63.34.14.23.63.43.23.53.12.82.73.42.50.33.53.43.49.03.13.03.14.22.82.22.3
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6815739373512442545996568210222561849318959818012452706815351604620839405293252021361727186414141323
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestee


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value681573937351244254599656821022256184
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquityMethodInvestee


Equity
Period End2020-12-312020-03-312019-12-312019-09-302019-03-31
Value451406010.0415
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount


Equity
Period End2020-12-31
Value5300000.0
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount100.0

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312019-12-312019-09-30
Value200000.0200000.01300000.03100000.0-3400000.0
Percentage of FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-31
Value3.5000000000000014.822
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0

us-gaap:GoodwillOtherIncreaseDecrease

us-gaap:GoodwillOtherIncreaseDecrease


Goodwill
Period End2020-12-31
Value0
Percentage of GoodwillOtherIncreaseDecrease0.0

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:ConsolidatedEntities, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill

srt:ParentCompany, us-gaap:CustomerRelationships


Impairment
Period End2020-09-302020-06-30
Value1232
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill100.0100.0

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:ConsolidatedEntities, us-gaap:ProductOrService, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

srt:ParentCompany, amg:ClosureOfCertainRetailInvestmentProducts, us-gaap:CustomerRelationships


Impairment
Period End2020-09-30
Value7.4
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill59.2

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Impairment
Period End2020-12-312020-09-302020-06-30
Value0.01460
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill0.0112.0183.8

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementEquityComponents

us-gaap:CustomerRelationships, us-gaap:Parent


Impairment
Period End2020-09-302020-06-30
Value1232
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill100.0100.0

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:ProductOrService, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

amg:ClosureOfCertainRetailInvestmentProducts, us-gaap:CustomerRelationships


Impairment
Period End2020-09-30
Value10
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill87.2

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:ProductOrService, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementEquityComponents

amg:ClosureOfCertainRetailInvestmentProducts, us-gaap:CustomerRelationships, us-gaap:Parent


Impairment
Period End2020-09-30
Value7.4
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill59.2

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3751351717-113.2-19.51029-358.1-191.55935967070758512867656811757605312950564618634365082191314329.82010499.59.99.1
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate


Income
Period End2021-06-302020-09-30
Value198.1
Percentage of IncomeTaxReconciliationChangeInEnactedTaxRate100.0100.0

us-gaap:IncreaseDecreaseInOperatingLiabilities

us-gaap:IncreaseDecreaseInOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value307-72.672-59.8132-209.6381860-172.9197525-128.06811746-180.4978.227-164.1247244-183.4-34.516861-50.81077646-52.0103842-88.4-21.73848-56.5275123-37.0
Percentage of IncreaseDecreaseInOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value26-11.2-81.622-3.2-10.8473.20.10.7120.4-0.20.10.31.60.40.5-0.2-0.60.72.9-8.4991.7-3.011
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value206867.9-101.55932-75.7-35.0-4.8131
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities


Incremental
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302010-06-30
Value2100000.02200000.00000-2200000.02200000.002200000.002200000.02200000.02200000.002200000.02200000.02200000.002200000.02200000.02200000.02200000.02100000.02100000.002000000.02000000.0000600000.0
Percentage of IncrementalCommonSharesAttributableToConversionOfDebtSecurities100.0100.00.00.00.00.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value900000.0600000.0100000.0200000.0100000.00100000.00000100000.0200000.0200000.0100000.0300000.0200000.0300000.0100000.0500000.0500000.0300000.00600000.0700000.0800000.0100000.01100000.01200000.01300000.0-100000.01300000.01200000.01300000.001300000.01300000.01300000.0-100000.01100000.01300000.01300000.0200000.0700000.01000000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.00.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:CustomerRelationships


Indefinite
Period End2021-06-302021-03-312020-12-31
Value1.22.819
Percentage of IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss100.0100.0100.0

us-gaap:InterestOnConvertibleDebtNetOfTax

us-gaap:InterestOnConvertibleDebtNetOfTax


Interest
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302010-06-30
Value4.64.70.00.00.00.00.00.0-14.24.70.04.73.93.93.93.83.93.93.93.83.83.83.83.8153.83.80.0102.60.00.00.00.0
Percentage of InterestOnConvertibleDebtNetOfTax100.0100.00.00.00.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.00.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value248246246212216207234222258228225253241266256238242242229244232226239243292252264258272235267229235214218196188181173168196179180151142119
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable


Noncontrolling
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
Value7956325573757267527788717891787155657569808361928586788291816967
Percentage of NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2.21.70.23.14.6120.20.30.4100.30.20.07.00.30.51.50.80.26.22.33.2-0.5-0.50.91.8-106.30.53778
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-17.30.6-6.22.90.0-1.8-0.3-2.0-0.6-0.9-1.4-0.6-3.4-1.4-0.40.01.0-1.2-0.33.5-2.5-3.5-0.7-1.30.61.5
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance-786.435.3-3100.093.50.0-14.9-150.0-666.7-150.0-8.9-466.7-300.00.0-20.0-133.30.066.7-150.0-150.056.5-108.7-109.4140.0260.066.783.3

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value191.16.40.24.6130.52.31.0111.70.83.48.40.70.50.52.00.52.74.86.70.20.80.30.3-106.30.53778
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance886.464.73200.06.5100.0114.9250.0766.7250.0108.9566.7400.00.0120.0233.3100.033.3250.0250.043.5208.7209.4-40.0-160.033.316.7100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value7.800000000000003246824-24.7-54.03736562820-29.8-18.3-74.4-16.3-17.1-100.3
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.5236624-23.2-52.935-37.65.27.5-54.6-56.4-20.22935532612
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax96.295.697.799.693.998.096.50.00.00.00.00.00.00.098.193.695.159.2

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-31
Value0.31.10.1-1.5-1.1-0.9
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax3.84.40.46.12.0-2.4

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax


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
Value8.4306525-25.5-42.223-40.711-4.3-40.3-56.0-20.22927461919-65.4-10.9-76.6-20.5-5.0-132.4124-43.1-26.9-27.128-30.72028-25.5-21.52216-28.72827-109.6
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value8.0296525-23.9-41.023-41.212-5.5-39.9-56.0-20.22935532612-42.6-16.8-53.9
Percentage of OtherComprehensiveIncomeLossBeforeTax95.298.098.999.293.797.297.1101.2106.1127.999.0100.0100.099.0130.5114.2140.163.565.1154.170.4

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.40.60.2-1.6-1.20.5-0.71.20.00.0
Percentage of OtherComprehensiveIncomeLossBeforeTax4.82.00.86.32.8-1.2-6.1-27.9-0.0-0.0

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

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


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value500000.0200000.0-100000.0-1200000.0-800000.000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0100.0100.00.00.0

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

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


Other
Period End2021-06-302020-06-30
Value100000.0-1200000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value400000.0500000.0600000.0200000.0-1300000.0-1000000.0700000.0500000.0-700000.01200000.0-400000.000300000.00100000.0
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0

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

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.02.83.53.53.53.53.30.5
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax0.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.02.83.53.53.53.53.30.5
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax0.00.00.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302020-06-30
Value0.3-0.5
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax100.0100.0

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

us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302020-06-30
Value500000.0200000.0
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


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
Value0.55.9-1.30.5-1.011-12.6-3.66.9-13.0140.40.00.0-4.1-2.4-3.12.4-9.21.8-9.0-6.611-32.6285.64.82.73.3-8.39.73.9-5.10.0-8.9-0.56.9-5.2-6.5282.51.8
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.55.8-1.40.5-0.711-12.6-3.66.9-13.0140.40.00.00.00.00.00.00.00.00.0
Percentage of OtherComprehensiveIncomeLossTax100.098.3107.7100.070.0101.7100.0100.0100.0100.0100.0100.00.00.0-0.0-0.0-0.00.0-0.00.0-0.0

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.00.10.0-0.3-0.20.00.00.00.00.0
Percentage of OtherComprehensiveIncomeLossTax0.01.70.030.0-1.7-0.00.0-0.00.00.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12131812111120131211361011128.510119.93.23.410.01210.011129.910.010109.910108.88.5119.49.49.09.39.39.38.56.8879.78.56.1
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1723234.0-15.3-9.06.22.74.44.4-13.2106.9-1.2-4.48.8147.610103.80.1-0.53.75.3-2.7-6.6-3.07.0-8.8-12.41.6-7.6-0.9-11.3-1.9-5.46.0-5.1-9.0-12.92.40.50.5-13.5
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value90102577772997183881047688921128588869284818710194106115114101122126219483954125431837824836136924162337
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesAndInterestInAffiliates

us-gaap:PaymentsToAcquireBusinessesAndInterestInAffiliates


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value352765896496603336151547421453366123336.8185739601318
Percentage of PaymentsToAcquireBusinessesAndInterestInAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireInterestInSubsidiariesAndAffiliates

us-gaap:PaymentsToAcquireInterestInSubsidiariesAndAffiliates


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13311420.01.70.70.010225340.00.07.30.00.30.0254.74763330.155124718320.07100.44251080.0260.00.0423504050.00.00.01311211665127
Percentage of PaymentsToAcquireInterestInSubsidiariesAndAffiliates100.0100.0100.00.0100.0100.00.0100.0100.0100.00.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value18211212111110.02.4228.7148.4135.0158.67.46.25.82.25.32.74.14.63.41.44.48.55.82.55.11.72.02.65.32.71.69.5-1.7392.49.120121514
Percentage of PaymentsToAcquireMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates

us-gaap:ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value5.2123.10.05.0120.10.50.59.40.00.10.06.20.20.82.06.00.08.20.72.90.10.01.05.0
Percentage of ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value9.95.0-4.6-3.6-23.6-8.2-39.150-24.93.6-68.640-1.3-10.90.12.5-4.6-18.8-17.60.44.59.4-0.1-5.20.0-3.30.00.2-35.530-26.7-10.4-4.57.5
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value163726162.93.41538161213282321312313207.22.44.3161.83.46.66.11.26.71.03.50.23.13.61412-1.70.50.0123.2730.00.011
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.7000000000000029.4103.42.431398.18.116
Percentage of ProceedsFromSaleMaturityAndCollectionsOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-0.10.61.0-0.1-0.2-0.10.65.07.86.03.826-5.6-6.8-2.4-0.7-0.5
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Reclassification
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-31
Value-0.10.6-0.1-0.2-0.10.1
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.016.7

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value0100000.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod0.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value-0.73106.18-2.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value0.15139.080.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value0200000.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod0.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2260.21.10.030-0.9243.4320.01.00.0360.2
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value0154.470
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0001.58300.0170.008-0.00300.01200.00100.0070000.00500000000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate0.00.00.0100.00.0100.0100.0100.00.0100.00.0100.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-0.337.60.130.10600.2940.032-0.05700.31900.00900.2460-0.02100.30100.00100.3060-0.01200.279
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate100.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value01.000.89100.009-0.0140.00300.02600.00200.0260-0.00100.0220000.01600.002-0.0010.014
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate0.0100.00.0100.00.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.00.00.0100.00.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.2150.040.10.74017.490-15.22033.580-5.17053.8101.56
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-31
Value-2.76122.4
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value091.8619.57
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice0.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value12.52137.550.02
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

us-gaap:EmployeeStockOption


Sharebased
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.80.50.03.9320.00.50.50.00.50.40.00.40.00.40.0160.00.50.00.5
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-0.7-10.20.0-0.10.0-6.40.60.3-0.1-6.10.53.30.7-9.56.54.25.25.19.35.12.0-0.94.00.79.2403.61216-37.70.5106.72727237.3146.80.35.815
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-2.0-44.30.0-1.1-6.4-33.40.0-0.1-0.8-33.0-2.7-5.4-1.3-2.2-35.8-2.7-15.8-63.3-18.2-6.0-4.2-25.4-5.1-2.5-23.1-100.3-24.2-23.0-19.7-67.5-0.7-16.0-8.1-28.4-24.5-22.3-5.4-9.8-5.10.0-11.0-21.5
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation285.7434.30.01100.00.0521.90.0-33.3800.0541.0-540.0-163.6-185.723.2-550.8-64.3-303.8-1241.2-195.7-117.6-210.02822.2-127.5-357.1-251.1-250.1-672.2-187.0-119.4179.0-140.0-149.5-120.9-102.2-89.7-94.9-74.0-65.8-75.00.0-189.7-142.4

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.3340.01.06.4270.60.40.7263.28.72.0-7.3426.9216827116.2249.13.232140273536291.226145651451224110.31636
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-185.7-334.30.0-1000.00.0-421.9100.0133.3-700.0-441.0640.0263.6285.776.8650.8164.3403.81341.2295.7217.6310.0-2722.2227.5457.1351.1350.1772.2287.0219.4-79.0240.0249.5220.9202.2189.7194.9174.0165.8175.0100.0289.7242.4

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:CommonStock, us-gaap:SubsequentEvent


Stock
Period End2021-02-18
Value151
Percentage of StockRepurchasedDuringPeriodValue100.0

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

us-gaap:TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseNetOfTax

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Translation
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value500000.0200000.0100000.0200000.0100000.0400000.003500000.0-100000.0200000.00
Percentage of TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseNetOfTax100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare

us-gaap:TreasuryStockAcquiredAverageCostPerShare


Treasury
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-09-30
Value158.83128.8467.8272.8582.1189.07146.85159.99192.7175.68
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockSharesAcquired


Treasury
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-09-302012-06-302011-12-312011-09-30
Value500000.01600000.01300000.0600000.01200000.0600000.0800000.0900000.0800000.0400000.0200000.0100000.0600000.0
Percentage of TreasuryStockSharesAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockSharesAcquired us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:CommonStock, us-gaap:SubsequentEvent


Treasury
Period End2021-02-182015-02-18
Value1200000.0300000.0
Percentage of TreasuryStockSharesAcquired0.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value8021022684506911011050907511315015013974122800.00.00.03334531281501860.00.00.02436-111.4
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-30
Value0.0-17.320-4.64.5-10.07.5
Percentage of TreasuryStockValueAcquiredCostMethod0.0-8.28.8-5.59.0-9.16.8

us-gaap:TreasuryStock


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value8022720689456912010250907511315015013974122800.00.00.03334531281501860.00.00.02436-111.4
Percentage of TreasuryStockValueAcquiredCostMethod100.0108.291.2105.591.0100.0109.193.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0

amg:AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax

amg:AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-64.8-73.8-98.3-154.9-170.4-146.5-108.8-125.0-95.1-106.9-109.0-60.1-6.7-0.9-21.8-51.1-94.4-108.7-122.9-80.8-76.3-26.7-18.1-12.576-2.831527351746338587966507150
Percentage of AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:AffiliateEquityUnrecognizedCompensationExpenseAttributabletoNoncontrollingInterest us-gaap:StatementEquityComponents

amg:AffiliateEquityUnrecognizedCompensationExpenseAttributabletoNoncontrollingInterest

us-gaap:NoncontrollingInterest


Affiliate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-03-312017-03-312016-03-312015-03-31
Value109109109115117126124123118115846251
Percentage of AffiliateEquityUnrecognizedCompensationExpenseAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DeferredTaxAssetsOperatingLeaseLiability

amg:DeferredTaxAssetsOperatingLeaseLiability


Deferred
Period End2020-12-312019-12-31
Value10.012
Percentage of DeferredTaxAssetsOperatingLeaseLiability100.0100.0

amg:DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions

amg:DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value26271011121416161616171717171111111110
Percentage of DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DeferredTaxLiabilitiesConvertibleSecuritiesInterest

amg:DeferredTaxLiabilitiesConvertibleSecuritiesInterest


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value999184771099992144142191193189184180175171166162154
Percentage of DeferredTaxLiabilitiesConvertibleSecuritiesInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization

amg:DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value116110141150177109126101103111113120121123126127135141143
Percentage of DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DeferredTaxLiabilityFromExcessInterestExpenseCalculation us-gaap:LongtermDebtType

amg:DeferredTaxLiabilityFromExcessInterestExpenseCalculation

us-gaap:ConvertibleDebtSecurities


Deferred
Period End2020-12-31
Value9.0
Percentage of DeferredTaxLiabilityFromExcessInterestExpenseCalculation100.0

amg:DuetoRelatedPartiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

amg:DuetoRelatedPartiesFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Dueto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value476622697311519365775362836794945709112262735629712793
Percentage of DuetoRelatedPartiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:DuetoRelatedPartiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Dueto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value476622697311519365775362836794945709112262735629712793
Percentage of DuetoRelatedPartiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:InvestmentCommitmentAmount

amg:InvestmentCommitmentAmount


Investment
Period End2021-06-302021-03-312020-12-31
Value128127122
Percentage of InvestmentCommitmentAmount100.0100.0100.0

amg:InvestmentCommitmentAmount us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ConsolidatedEntities


Investment
Period End2020-09-30
Value129
Percentage of InvestmentCommitmentAmount0.0

amg:LiabilitiesAndNoncontrollingInterests us-gaap:RelatedPartyTransactionsByRelatedParty

amg:LiabilitiesAndNoncontrollingInterests

us-gaap:EquityMethodInvestee


Liabilities
Period End2020-12-312019-12-31
Value12451212
Percentage of LiabilitiesAndNoncontrollingInterests100.0100.0

amg:MarketableSecuritiesCost

amg:MarketableSecuritiesCost


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value541026967626157283135126128737467
Percentage of MarketableSecuritiesCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:MarketableSecuritiesFairValue us-gaap:ConsolidatedEntities

amg:MarketableSecuritiesFairValue

us-gaap:VariableInterestEntityPrimaryBeneficiary


Marketable
Period End2021-03-312020-12-31
Value7752
Percentage of MarketableSecuritiesFairValue100.0100.0

amg:MarketableSecuritiesFairValueDeconsolidation us-gaap:ConsolidatedEntities

amg:MarketableSecuritiesFairValueDeconsolidation

us-gaap:VariableInterestEntityPrimaryBeneficiary


Marketable
Period End2021-06-302020-12-312019-12-31
Value195238
Percentage of MarketableSecuritiesFairValueDeconsolidation100.0100.0100.0

amg:MarketableSecuritiesFairValueDeconsolidation us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Marketable
Period End2020-09-302020-06-302019-12-31
Value433738
Percentage of MarketableSecuritiesFairValueDeconsolidation0.00.0100.0

amg:MarketableSecuritiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

amg:MarketableSecuritiesFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value483425272624
Percentage of MarketableSecuritiesFairValueDisclosure100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value147449403535
Percentage of MarketableSecuritiesFairValueDisclosure30.3217.2191.4148.0133.5143.4

amg:MarketableSecuritiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value6210874686159
Percentage of MarketableSecuritiesFairValueDisclosure130.3317.2291.4248.0233.5243.4

amg:MarketableSecuritiesUnrealizedGains

amg:MarketableSecuritiesUnrealizedGains


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.36.35.52.41.70.42.12.52.31.61.1151213
Percentage of MarketableSecuritiesUnrealizedGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:MarketableSecuritiesUnrealizedLosses

amg:MarketableSecuritiesUnrealizedLosses


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value500000.0400000.001700000.02600000.07400000.0600000.0400000.0100000.0200000.08600000.002300000.02300000.0
Percentage of MarketableSecuritiesUnrealizedLosses100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

amg:ObligationstoRelatedPartiesMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

amg:ObligationstoRelatedPartiesMeasurementInput

srt:Maximum, us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, us-gaap:MeasurementInputDiscountRate, amg:DiscountedCashFlowValuationTechnique


Obligationsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value16.016.016.016.00.160.17
Percentage of ObligationstoRelatedPartiesMeasurementInput100.0100.0100.0100.0100.0100.0

srt:Maximum, us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, us-gaap:MeasurementInputLongTermRevenueGrowthRate, amg:DiscountedCashFlowValuationTechnique


Obligationsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value6.08.08.08.00.10.07
Percentage of ObligationstoRelatedPartiesMeasurementInput37.550.050.050.062.541.2

srt:Minimum, us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, us-gaap:MeasurementInputDiscountRate, amg:DiscountedCashFlowValuationTechnique


Obligationsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value15.014.014.014.00.150.14
Percentage of ObligationstoRelatedPartiesMeasurementInput93.887.587.587.593.882.4

srt:Minimum, us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, us-gaap:MeasurementInputLongTermRevenueGrowthRate, amg:DiscountedCashFlowValuationTechnique


Obligationsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.0-1.0-5.0-1.0-0.01-0.09
Percentage of ObligationstoRelatedPartiesMeasurementInput6.2-6.2-31.2-6.2-6.2-52.9

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, us-gaap:MeasurementInputDiscountRate, amg:DiscountedCashFlowValuationTechnique


Obligationsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value15.015.015.015.00.150.15
Percentage of ObligationstoRelatedPartiesMeasurementInput93.893.893.893.893.888.2

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, us-gaap:MeasurementInputLongTermRevenueGrowthRate, amg:DiscountedCashFlowValuationTechnique


Obligationsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4.04.03.07.00.090.05
Percentage of ObligationstoRelatedPartiesMeasurementInput25.025.018.843.856.229.4

amg:OperatingLossCarryforwardsForeignNotSubjectToExpiration us-gaap:IncomeTaxAuthority

amg:OperatingLossCarryforwardsForeignNotSubjectToExpiration

us-gaap:ForeignCountry


Operating
Period End2020-12-31
Value9600000.0
Percentage of OperatingLossCarryforwardsForeignNotSubjectToExpiration100.0

amg:OtherCommitmentDueInSecondThirdOrFourthYear us-gaap:OtherCommitments

amg:OtherCommitmentDueInSecondThirdOrFourthYear

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2021-03-31
Value77
Percentage of OtherCommitmentDueInSecondThirdOrFourthYear100.0

amg:OtherCommitmentDueInThirdFourthAndFifthYear us-gaap:OtherCommitments

amg:OtherCommitmentDueInThirdFourthAndFifthYear

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2020-12-312020-09-30
Value7762
Percentage of OtherCommitmentDueInThirdFourthAndFifthYear100.0100.0

amg:OtherCommitmentExpectedPayments us-gaap:OtherCommitments

amg:OtherCommitmentExpectedPayments

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2021-06-302021-03-312020-12-312020-09-30
Value13131353
Percentage of OtherCommitmentExpectedPayments100.0100.0100.0100.0

amg:OtherCommitmentToBePaidAfterYearOne us-gaap:OtherCommitments

amg:OtherCommitmentToBePaidAfterYearOne

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2021-06-30
Value147
Percentage of OtherCommitmentToBePaidAfterYearOne100.0

amg:OtherInvestmentsandOtherAssets

amg:OtherInvestmentsandOtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value25521723031329529230425026823994256223
Percentage of OtherInvestmentsandOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

amg:UnrecognizedCompensationExpensesRelatedtoAffiliateEquityAttributabletoControllingInterest us-gaap:RelatedPartyTransactionsByRelatedParty

amg:UnrecognizedCompensationExpensesRelatedtoAffiliateEquityAttributabletoControllingInterest

srt:AffiliatedEntity


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-31
Value493635374042404138
Percentage of UnrecognizedCompensationExpensesRelatedtoAffiliateEquityAttributabletoControllingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value843543712514572414634648607576746761662667807698618541729579578571729699632577808735578509514363
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet

us-gaap:AccountsReceivableNet


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value711509421404497437417485528535400524485532433487440449383387471495391466482514425524483486418311
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AlternativeInvestment us-gaap:ConsolidatedEntities, us-gaap:InvestmentType

us-gaap:AlternativeInvestment

srt:ParentCompany, us-gaap:OtherThanSecuritiesInvestment


Alternative
Period End2020-12-312019-12-31
Value164137
Percentage of AlternativeInvestment100.0100.0

us-gaap:AlternativeInvestment us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasuredAtNetAssetValuePerShare


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value298278243215195211
Percentage of AlternativeInvestment0.00.0148.10.00.0153.9

us-gaap:AlternativeInvestment us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, amg:OtherFunds


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value17158.06.35.34.28.58.39.19.07.97.48.9
Percentage of AlternativeInvestment0.00.04.90.00.00.06.20.00.00.00.00.00.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:OtherThanSecuritiesInvestment


Alternative
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value243222211205209207201192165
Percentage of AlternativeInvestment148.10.0153.90.00.00.00.00.00.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:PrivateEquityFunds


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value281263235208190218203196200198193185156
Percentage of AlternativeInvestment0.00.0143.20.00.00.0147.70.00.00.00.00.00.0

us-gaap:AlternativeInvestment us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementEquityComponents

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:Parent


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value202191164145137
Percentage of AlternativeInvestment0.00.0100.00.0100.0

us-gaap:AssetsNet us-gaap:ConsolidatedEntities

us-gaap:AssetsNet

us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Assets
Period End2021-06-302021-03-312020-12-312019-12-31
Value1113129013841141
Percentage of AssetsNet100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assets
Period End2021-06-302021-03-312020-12-312019-12-31
Value2960258523782282
Percentage of AssetsNet265.9200.4171.8199.9

us-gaap:AssetsNet us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Assets
Period End2020-09-302020-06-302019-12-31
Value10859861141
Percentage of AssetsNet0.00.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assets
Period End2020-09-302020-06-302019-12-31
Value230923212282
Percentage of AssetsNet0.00.0199.9

us-gaap:ConvertibleDebtFairValueDisclosures us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:ConvertibleDebtFairValueDisclosures

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value304308318317316316315314313313312311311310309309308308307306306305305304304303303302302301518
Percentage of ConvertibleDebtFairValueDisclosures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value468459427390277260415401416436391498513534549527510489466465470476483483517525532
Percentage of ConvertibleDebtFairValueDisclosures153.8148.9134.3122.987.582.3131.8127.7132.6139.4125.3159.9165.1172.0177.4170.6165.4158.9151.8151.8153.7155.7158.5158.7170.0173.1175.6

us-gaap:ConvertibleDebtFairValueDisclosures us-gaap:LongtermDebtType

us-gaap:ConvertibleDebtSecurities


Convertible
Period End2020-12-312019-12-312018-12-31
Value318315312
Percentage of ConvertibleDebtFairValueDisclosures100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

amg:FivePointEightSeventyFiveJuniorSubordinatedNotesDue2059, us-gaap:JuniorSubordinatedDebt


Debt
Period End2020-12-312019-06-302019-04-302019-03-312019-03-27
Value300300300280280
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0

amg:FourPointSevenFivePercentJuniorSubordinatedNotesDue2060, us-gaap:JuniorSubordinatedDebt


Debt
Period End2020-12-31
Value275
Percentage of DebtInstrumentFaceAmount91.7

amg:JuniorConvertibleTrustPreferredSecurities, us-gaap:ConvertibleDebtSecurities


Debt
Period End2021-03-31
Value416
Percentage of DebtInstrumentFaceAmount0.0

amg:SeniorNotesThreePointThreeZeroPercentDue2030, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value350
Percentage of DebtInstrumentFaceAmount116.7

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

us-gaap:DebtInstrumentInterestRateEffectivePercentage

amg:FivePointEightSeventyFiveJuniorSubordinatedNotesDue2059, us-gaap:JuniorSubordinatedDebt


Debt
Period End2020-12-31
Value5.9
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0

amg:FourPointSevenFivePercentJuniorSubordinatedNotesDue2060, us-gaap:JuniorSubordinatedDebt


Debt
Period End2020-12-31
Value4.83
Percentage of DebtInstrumentInterestRateEffectivePercentage81.9

amg:SeniorNotesFourPointTwoFivePercentDue2024, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-31
Value4.420.0442
Percentage of DebtInstrumentInterestRateEffectivePercentage74.90.0

amg:SeniorNotesThreePointFiveZeroPercentDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-31
Value3.660.0366
Percentage of DebtInstrumentInterestRateEffectivePercentage62.00.0

amg:SeniorNotesThreePointThreeZeroPercentDue2030, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value3.39
Percentage of DebtInstrumentInterestRateEffectivePercentage57.5

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value478510565499730624563521568
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value969277569278901019489939384828183968579
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value191716161412
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign us-gaap:BalanceSheetLocation

us-gaap:OtherAssets


Deferred
Period End2020-12-312019-12-31
Value1917
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17151816171715292726242325252626272830
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign


Deferred
Period End2020-12-312017-12-312016-12-312015-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8.20.010.00.00.0108.9152013141315202017
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsForeign100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value15131810343026292725242321201817151310
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value235293337258396320270241265254246238263245257247241231209
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-312019-12-31
Value7.310
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8500000.04100000.02600000.06300000.0800000.01500000.002000000.02800000.02800000.02900000.02800000.02900000.03000000.03000000.03200000.02700000.02600000.02800000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value100.05.947927432171117185.34.1105.63.91926
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement us-gaap:BalanceSheetLocation

us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement

us-gaap:OtherAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1600000.01900000.03500000.02600000.01000000.01200000.02200000.0700000.0900000.0
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssets

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1.61.93.52.61.01.27.922121.45.81.00.2
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1.61.93.52.61.01.27.922121.45.81.00.2
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeCollateralRightToReclaimCash us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeCollateralRightToReclaimCash

us-gaap:ForeignExchangeForward


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1.61.62.21.60.60.00.028
Percentage of DerivativeCollateralRightToReclaimCash100.0100.0100.0100.0100.00.00.0100.0

us-gaap:InterestRateSwap


Derivative
Period End2020-12-31
Value2.2
Percentage of DerivativeCollateralRightToReclaimCash0.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.61.93.52.61.01.22373471732
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:NetInvestmentHedging, us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.93.52.61.01.23885664366
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0163.4115.6139.9254.7206.6

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302020-12-31
Value1.63.5
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging, us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.62.31.90.60.41.00.2-0.30.0-1.4
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.21.41.92.12.00.80.0
Percentage of DerivativeFairValueOfDerivativeLiability0.0233.382.6110.5333.3200.00.0

us-gaap:InterestRateSwap, us-gaap:NetInvestmentHedging, us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-31
Value1.9
Percentage of DerivativeFairValueOfDerivativeLiability82.6

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:NetInvestmentHedging, us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2.04.24.02.61.23263-54.9-42.4-61.7
Percentage of DerivativeFairValueOfDerivativeLiability333.3182.6210.5433.3300.03200.031650.018300.00.04407.1

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:FairValueMeasurementsRecurring, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302020-12-31
Value1.24.2
Percentage of DerivativeFairValueOfDerivativeLiability0.0182.6

us-gaap:DerivativeLiabilities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilities

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1200000.02000000.04200000.04000000.02600000.01200000.01000000.0200000.0300000.001400000.04500000.0600000.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1200000.02000000.04200000.04000000.02600000.01200000.01000000.0200000.0300000.001400000.04500000.0600000.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement us-gaap:BalanceSheetLocation

us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement

us-gaap:OtherLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1200000.02000000.04200000.04000000.02600000.01200000.01000000.0200000.01400000.0
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueFromAffiliates us-gaap:BalanceSheetLocation

us-gaap:DueFromAffiliates

us-gaap:OtherAssets


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value8.6119.6141212141419151617151712101323222016172220
Percentage of DueFromAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToAffiliateCurrentAndNoncurrent us-gaap:BalanceSheetLocation

us-gaap:DueToAffiliateCurrentAndNoncurrent

us-gaap:OtherLiabilities


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value4766226973115193657753628367949457091122627356229
Percentage of DueToAffiliateCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value400421463472418455491187138
Percentage of EmployeeRelatedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-31
Value8597868810112310611670775467778963738393668394105707986955664707279788075
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value10910811216217420035245049149551352453933681937103161510311123
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount


Equity
Period End2021-06-302021-03-312020-12-312020-09-30
Value1313138.5
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0100.0

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12812712212913512797929187777674806667707073627171737575738480848989
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments us-gaap:InvestmentType

us-gaap:OtherThanSecuritiesInvestment


Fair
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1220.01271271461391461311301221209894929792
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.00.00.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0

us-gaap:PrivateEquityFunds


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12812712212913512712714613914613113012212098949297929187777674806667707073627171737575738480848989
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5655655655652902902902902902710.0
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5935936236073222783273143072750.0
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations104.8104.8110.1107.5110.895.8112.7108.3105.7101.50.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value47662269731151936577536
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:FairValueByLiabilityClass

amg:ObligationsToRelatedParties


Fair
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value221151936577536283679494570911226273562971278693929813176
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302011-12-312010-12-31
Value1046103510261014109010531046106010391018988951920897874853832810788760733707680651620592565527498470442383383317228
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-06-30
Value303030303060100120110100909085858585100110110110120
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AcquiredClientRelationshipsOfEquityMethodInvestments, us-gaap:EquityMethodInvestee


Finite
Period End2020-12-31
Value120
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths400.0

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Finite
Period End2021-06-302021-03-312020-09-302020-06-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value80501201201509010010010010085
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths266.7166.7400.0400.0150.075.0100.0111.1111.1117.6100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302016-03-312015-09-302015-03-31
Value152310.06060100110120120
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Finite
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value608540150150150
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear400.0369.6400.0250.0250.0150.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value10.010.010.010.020205050653035404030303030100110110110110120120120120110
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AcquiredClientRelationshipsOfEquityMethodInvestments, us-gaap:EquityMethodInvestee


Finite
Period End2020-12-31
Value50
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive500.0

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Finite
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value504050407575859090908085
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive500.0400.0500.0200.0150.0150.0130.8257.1225.0225.0266.7283.3

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value10.02020202030305050653035404030505050100110110110110120120120120110
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AcquiredClientRelationshipsOfEquityMethodInvestments, us-gaap:EquityMethodInvestee


Finite
Period End2020-12-31
Value50
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour250.0

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Finite
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value50505050507575859090908085
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour500.0250.0250.0250.0166.7150.0150.0130.8257.1225.0225.0160.0170.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1520303030305050653060656550858585100110110110110120120120
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AcquiredClientRelationshipsOfEquityMethodInvestments, us-gaap:EquityMethodInvestee


Finite
Period End2020-12-31
Value50
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree166.7

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Finite
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value50505050607575859090908085
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree333.3250.0166.7166.7200.0150.0150.0130.8150.0138.5138.594.1100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3030303030307575905590909085858585100110110110110120120120
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AcquiredClientRelationshipsOfEquityMethodInvestments, us-gaap:EquityMethodInvestee


Finite
Period End2020-12-31
Value50
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo166.7

us-gaap:CustomerRelationships, us-gaap:EquityMethodInvestee


Finite
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value805050501201501509090909010085
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo266.7166.7166.7166.7400.0200.0200.0100.0100.0100.0100.0117.6100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302011-12-312010-12-31
Value117011681166115912411240125612891292129312921293129412971295129512931291129012931294130013011275127812501255118711891120103911091141970971
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InvestmentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Investments
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2523243033361191448481773.4
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Investments
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value4930350.00.00.00.00.00.00.00.00.0
Percentage of InvestmentsFairValueDisclosure191.4128.5143.40.00.00.00.00.00.00.00.00.0

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Investments
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value7454593033361191448481773.4
Percentage of InvestmentsFairValueDisclosure291.4228.5243.4100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value40
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:ValuationTechnique

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:FairValueInputsLevel3, amg:ObligationsToRelatedParties, amg:DiscountedCashFlowValuationTechnique


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value476622697311519365775362849
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value350
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value400
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongtermDebtWeightedAverageInterestRate us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongtermDebtWeightedAverageInterestRate

amg:SeniorUnsecuredTermLoan, us-gaap:UnsecuredDebt


Longterm
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.020.02660.03330.0269
Percentage of LongtermDebtWeightedAverageInterestRate100.0100.0100.0100.0

us-gaap:MarketableSecurities

us-gaap:MarketableSecurities


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value62108746861545930333611914484817792103115122213203208199171261192172158149136157128
Percentage of MarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners

amg:MinorityOwner, us-gaap:EquityMethodInvestee


Minority
Period End2020-09-30
Value14.0
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners100.0

us-gaap:NotesPayableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:NotesPayableFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value10971097109710971097747746746746746746746746745745745945945945945944944944108410841084736736736736340
Percentage of NotesPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value11861180120611971165771797789783760747743744753765779968962936977982954966110210921136786
Percentage of NotesPayableFairValueDisclosure108.1107.5110.0109.1106.3103.2106.8105.7105.0101.9100.299.799.7101.0102.6104.6102.4101.899.0103.5104.0101.0102.3101.7100.7104.8106.7

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7466636155
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value243245455432489
Percentage of OperatingLossCarryforwards328.4367.6721.1703.4888.7

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority, us-gaap:TaxPeriod

us-gaap:ForeignCountry, amg:ExpireOverTwentyYearPeriod


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value64575451
Percentage of OperatingLossCarryforwards87.186.185.784.2

us-gaap:OperatingLossCarryforwardsValuationAllowance us-gaap:BalanceSheetLocation

us-gaap:OperatingLossCarryforwardsValuationAllowance

us-gaap:OtherAssets


Operating
Period End2020-12-312019-12-31
Value132.3
Percentage of OperatingLossCarryforwardsValuationAllowance100.0100.0

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value31221324093113981047650
Percentage of OtherAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCommitment us-gaap:OtherCommitments

us-gaap:OtherCommitment

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2021-06-302021-03-31
Value188118
Percentage of OtherCommitment100.0100.0

us-gaap:OtherCommitment us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestee


Other
Period End2021-06-302021-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value104104150170170170170170170316316
Percentage of OtherCommitment55.588.50.00.00.00.00.00.00.00.00.0

us-gaap:OtherCommitmentDueInNextTwelveMonths us-gaap:OtherCommitments

us-gaap:OtherCommitmentDueInNextTwelveMonths

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2021-06-302021-03-312020-09-302020-06-30
Value4040150150
Percentage of OtherCommitmentDueInNextTwelveMonths100.0100.0100.0100.0

amg:PaymentsForInvestmentInAffiliate


Other
Period End2020-09-302020-06-30
Value3525
Percentage of OtherCommitmentDueInNextTwelveMonths23.316.7

us-gaap:OtherCommitmentDueInNextTwelveMonths us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestee


Other
Period End2021-06-302021-03-312020-12-31
Value777735
Percentage of OtherCommitmentDueInNextTwelveMonths191.4191.40.0

us-gaap:OtherCommitmentDueInSecondYear us-gaap:OtherCommitments

us-gaap:OtherCommitmentDueInSecondYear

amg:PaymentsForAchievementOfFinancialTargets


Other
Period End2020-12-312020-09-302020-06-30
Value377777
Percentage of OtherCommitmentDueInSecondYear100.0100.0100.0

us-gaap:OtherCommitmentDueInSecondYear us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestee


Other
Period End2020-12-31
Value37
Percentage of OtherCommitmentDueInSecondYear100.0

us-gaap:OtherCommitmentsFutureMinimumPaymentsRemainderOfFiscalYear us-gaap:OtherCommitments

us-gaap:OtherCommitmentsFutureMinimumPaymentsRemainderOfFiscalYear

amg:PaymentsForInvestmentInAffiliate


Other
Period End2020-09-302020-06-30
Value3510.0
Percentage of OtherCommitmentsFutureMinimumPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:OtherInvestments

us-gaap:OtherInvestments


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value312292257223204222211205209207201165160151148147144142144149158165158167171172169164155153156157145124
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities

us-gaap:OtherLiabilities


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value468483452463468539359346354386162166162216182178203253149170179189213188229181214201203237177177
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

amg:AchievementOfSpecifiedFinancialTargets, us-gaap:EquityMethodInvestee


Other
Period End2020-12-31
Value40
Percentage of OtherLiabilities8.8

amg:PrivateEquityInvestmentPartnershipsofAffiliate, amg:PriorOwner


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value32333533323638404346495152576164656667727375
Percentage of OtherLiabilities7.06.97.87.36.96.810.711.812.411.930.531.132.526.433.636.032.026.445.442.340.735.2

us-gaap:OtherMinorityInterests

us-gaap:OtherMinorityInterests


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value54853653747948752856156360061967770371874575677677078480684786590493294598598710169189609451010970937907957923879611633634626589582281
Percentage of OtherMinorityInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount


Redeemable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value755730671652682581916847727754833968953941811804730733673778745658612695744743645703678660641614519512477513481509451455517406369
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Redeemable
Period End2021-06-302021-03-312020-12-312019-12-31
Value21593521
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount2.88.15.32.4

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Redeemable
Period End2020-09-302020-06-302019-12-31
Value252021
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount3.93.02.4

us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees

us-gaap:EquityMethodInvestee


Retained
Period End2020-12-31
Value170
Percentage of RetainedEarningsUndistributedEarningsFromEquityMethodInvestees100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1100000.01100000.01200000.01100000.01100000.01200000.01100000.01000000.0700000.0700000.0600000.0600000.0400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value93.5293.3699.4699.2198.78101.24123.7121.11143.94145.8172.74172.58162.32
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1200000.0300000.03100000.03100000.03100000.03500000.03500000.03400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value200000.0400000.0400000.0400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value136.09127.49126.95128.91
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2020-12-31
Value500000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased us-gaap:ShareRepurchaseProgram, us-gaap:StatementClassOfStock

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

amg:January2019andOctober2019Programs, us-gaap:CommonStock


Stock
Period End2020-12-312019-12-31
Value1900000.06900000.0
Percentage of StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased100.0100.0

us-gaap:StockholdersEquityBeforeTreasuryStock

us-gaap:StockholdersEquityBeforeTreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value473847014636449944174503441844314485435046044692460944984485419340983982400535963343329932593057299828082867267726112532226521642298228922982197216921622154209520732093
Percentage of StockholdersEquityBeforeTreasuryStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockCommonShares

us-gaap:TreasuryStockCommonShares


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value171614131111108.87.87.16.55.85.14.23.42.92.61.8
Percentage of TreasuryStockCommonShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockShares

us-gaap:TreasuryStockShares


Treasury
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value14106.53.41.82.01.21.01.72.52.3393.445
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2020-12-31
Value317
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value11102.11.71.41.61.71.81.61.72.21.63.24.4
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value6365333226252525261719121613
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForNotesReceivable


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value4.84.15.03.61010128.88.49.68.51319
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowanceOfDeferredTaxAssets


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value35162424222018362135383339
Percentage of ValuationAllowancesAndReservesBalance741.7412.2482.0669.4214.6193.4152.1415.9253.6370.8451.8250.8209.5

us-gaap:VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure us-gaap:ConsolidatedEntities

us-gaap:VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure

us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Variable
Period End2021-06-302021-03-312020-12-312019-12-31
Value2009189019621843
Percentage of VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure100.0100.0100.0100.0

us-gaap:VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Variable
Period End2020-09-302020-06-302019-12-31
Value181218161843
Percentage of VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure0.00.0100.0

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount

us-gaap:VariableInterestEntityPrimaryBeneficiary


Variable
Period End2021-06-302021-03-312020-12-312019-12-31
Value132.70.90.9
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount100.0100.0100.0100.0

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Variable
Period End2020-09-302020-06-302019-12-31
Value0.70.30.9
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount0.00.0100.0

Line plots across dimensions of each concept


us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
(None,)
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amountus-gaap: Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities
us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)
Other Comprehensive Income Loss Net Of Taxus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:LongTermDebt
us-gaap:LongtermDebtType
(None,)
Long Term Debtus-gaap: Longterm Debt Type
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components