ASGN


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockParOrStatedValuePerShare

us-gaap:PreferredStockParOrStatedValuePerShare
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding
us-gaap:StatementEquityComponents
us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit
us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:Revenues
asgn:RevenueType, us-gaap:StatementBusinessSegments
us-gaap:MajorCustomers
us-gaap:StatementBusinessSegments

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:ReceivablesNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AmortizationOfIntangibleAssets
us-gaap:StatementBusinessSegments

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:StatementGeographical

us-gaap:Goodwill
us-gaap:StatementBusinessSegments
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:StatementGeographical

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:DeferredTaxLiabilities

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

asgn:IncreaseDecreaseInOperatingLeaseLiability

asgn:IncreaseDecreaseInOperatingRightofUseAsset

asgn:NetIncomeFromContinuingOperations

asgn:NetIncomeFromDiscontinuedOperations
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

asgn:OperatingLeaseRightOfUseAssetsObtainedInExchangeForOperatingLeaseLiabilities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
asgn:ProceedsFromSaleOfPropertyHeldForSaleNetTax

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:Depreciation
us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents
us-gaap:BusinessAcquisition
us-gaap:GoodwillAcquiredDuringPeriod

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedSalaries

us-gaap:IncreaseDecreaseInOperatingLeaseLiability

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForOtherTaxes

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:BusinessAcquisition

us-gaap:ProceedsFromIssuanceOrSaleOfEquity
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProceedsFromSaleOfPropertyHeldForSale

us-gaap:ProceedsFromStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

asgn:DeferredPayrollTaxesCARESActCurrentPortion

asgn:DeferredPayrollTaxesCARESActTotalAmount

asgn:DeferredTaxAssetsLeasingliabilities

asgn:DeferredTaxAssetsOperatingLossCarryforwardsNoncurrentForeign

asgn:DeferredTaxAssetsOtherNoncurrent

asgn:DeferredTaxLiabilitiesNetOfDeferredTaxAssetsAndValuationAllowance

asgn:DeferredTaxLiabilityLeasingAsset
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
asgn:DisposalGroupLeaseLiabilityCurrent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
asgn:DisposalGroupLeaseLiabilityNoncurrent

asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest
us-gaap:AwardType
us-gaap:AwardType
asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnvestedAndExpectedToVestWeightedAverageGrantDateFairValue

dei:EntityCommonStockSharesOutstanding

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:Range
us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets

us-gaap:ContractWithCustomerLiability

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityCurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DeferredCompensationPlanAssets

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRevenue

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent

us-gaap:DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationCapitalLeasedAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationGoodwill1
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationIntangibleAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherLiabilities

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EstimatedInsuranceRecoveries

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:GoodwillGross
us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedTrademarks

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent
us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LongTermDebtFairValue

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:OtherFiniteLivedIntangibleAssetsGross

us-gaap:PrepaidExpenseCurrent

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation

us-gaap:PurchaseObligation

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInThirdYear

us-gaap:SelfInsuranceReserve

us-gaap:SeniorNotes
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType
us-gaap:PlanName

us-gaap:UnamortizedDebtIssuanceExpense
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Interest Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Property Plant And Equipment Net
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Prepaid Deferred Expense And Other Assets
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Common Stock Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue ▆▆▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇██▇▇▇▇▇▇██████▇▇▇▁▁▁▁0.50.50.50.50.50.50.50.50.50.50.5250.5240.5230.5230.5210.520.5280.5280.5270.5310.5350.5330.530.5280.5260.5170.5140.5230.5440.5430.5390.5380.5350.5320.530.5250.5190.3760.370.3690.37NA0.365NANA
us-gaap:CommonStockParOrStatedValuePerShare ████▁▁█▁▁▁███████████████████████████████1e-081e-081e-081e-080.00.01e-080.00.00.01e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-08NA1e-08NANA
us-gaap:PreferredStockParOrStatedValuePerShare ████▁▁█▁▁▁███████████████████████████████1e-081e-081e-081e-080.00.01e-080.00.00.01e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-08NA1e-08NANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▄▄53.253.2NA52.852.552.452.952.752.852.852.552.452.352.352.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStockNA53.252.9NANA52.452.9NANANA52.51144NANANA52.151538NANANA52.716388NANANA53.024972NANANA51.386693NANANA53.926525NANANA52.96057NANANA37.01225NANANA36.398811NANA
us-gaap:CommonStockSharesOutstanding ██▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██▇▇▇▇▇▇██████▇▇▇▁▁▁▁53.253.252.952.852.552.452.952.752.852.852.5114452.45688652.31764552.28105252.15153851.99181552.84056752.79487152.71638853.15556853.49053953.34439553.02497252.77332652.60530151.7013651.38669352.33639854.43258754.31898653.92652553.82335453.54817653.21241952.9605752.49809951.94467337.57577737.0122536.87450137.003717NA36.398811NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁53.953.7NA53.053.053.3NA53.453.453.2NA53.03453.0152.831NA53.17353.47353.249NA53.76853.91153.644NA53.30452.63352.209NA54.12955.17354.975NA54.62454.32754.036NA53.16245.87938.154NA37.7690.03771837.429NA36.9740.03715
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁53.253.0NA52.552.552.8NA52.852.852.6NA52.36252.30552.178NA52.552.82352.658NA53.27553.42253.147NA52.65451.97851.519NA53.37454.37254.104NA53.6253.37853.046NA52.13144.85237.269NA37.0010.03697136.623NA36.5060.036427
us-gaap:EarningsPerShareBasic █▆▇▇▆▆▆▇▆▅▆▇▅▅█▅▅▄▄▅▅▄▄▅▄▆▄▄▄▄▅▄▃▅▃▄▃▃▃▃▃▃▁▃▃1.210.921.04999999999999981.00.930.830.751.090.820.660.880.940.640.561.28999999999999980.660.630.430.450.560.490.330.370.470.270.760.390.410.380.260.60.380.140.460.220.330.190.140.20.210.160.09-0.370.090.03
us-gaap:EarningsPerShareDiluted █▆▇▇▇▆▆▇▆▅▆▇▅▅█▅▅▄▄▅▅▄▄▅▄▆▄▄▄▄▅▄▃▅▃▄▃▃▃▃▃▃▁▃▃1.190.911.02999999999999980.990.920.820.741.080.810.660.860.930.630.551.27000000000000020.660.620.420.450.550.480.320.360.470.270.750.390.410.380.250.590.370.140.460.210.330.190.140.20.210.160.08-0.370.090.03
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare 1.08e-06NANANA8.3e-07NANANANANA8.8e-079.399999999999999e-076.4e-075.6e-071.29e-066.6e-076.3e-074.3e-074.5000000000000003e-075.6e-074.9e-073.3e-073.6e-074.6999999999999995e-072.8e-072.5e-074.2e-074.1e-073.8e-072.6e-073.2e-073.8e-071.5e-072.0000000000000002e-072.3000000000000002e-072.8e-071.4e-071.4e-07NANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare 1.06e-06NANANA8.2e-07NANANANANA8.6e-079.300000000000001e-076.3e-075.5e-071.28e-066.6e-076.2e-074.2e-074.5000000000000003e-075.5e-074.8e-073.2e-073.6e-074.6999999999999995e-072.7e-072.5e-074.1e-074.1e-073.8e-072.6e-073.2e-073.7e-071.4e-072.0000000000000002e-072.2e-072.8e-071.3e-071.3e-07NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 Gross Margin us-gaap:StatementBusinessSegments asgn:ApexSegmentNA630.4619.1596.1576.9629.1641.3644.1628.5606.1604.514589.717567.507538.5534.692517.492502.455482.515476.064473.546453.723433.155432.978421.067338.704294.293307.724306.027297.893278.408249.92246.369233.446212.728207.576202.66499.004NANANANANANANANA
 Gross Margin us-gaap:StatementBusinessSegments asgn:CommercialBusiness712.5NANANA592.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Gross Margin us-gaap:StatementBusinessSegments asgn:ECSNA257.8263.2288.6239.7212.7233.5206.1190.6168.0173.929164.0155.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Gross Margin us-gaap:StatementBusinessSegments asgn:FederalGovernmentBusiness262.4NANANA239.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Gross Margin us-gaap:StatementBusinessSegments asgn:OxfordSegmentNA137.5129.10000000000005127.2120.2148.7150.4152.5153.2149.6151.288152.701155.852146.7144.343149.556150.858144.013144.82155.855154.365148.885144.539151.056146.619127.471123.872125.944126.004117.5115.448100.005101.47495.26290.4188.10488.10778.75971.2370.07465.319NANANANA
 Operating Margin us-gaap:StatementBusinessSegments asgn:ApexSegmentNA630.4619.1596.1576.9629.1641.3644.1628.5606.1604.514589.717567.507538.5534.692517.492502.455482.515476.064473.546453.723433.155432.978421.067338.704294.293307.724306.027297.893278.408249.92246.369233.446212.728207.576202.66499.004NANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments asgn:CommercialBusiness712.5NANANA592.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments asgn:ECSNA257.8263.2288.6239.7212.7233.5206.1190.6168.0173.929164.0155.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments asgn:FederalGovernmentBusiness262.4NANANA239.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments asgn:OxfordSegmentNA137.5129.10000000000005127.2120.2148.7150.4152.5153.2149.6151.288152.701155.852146.7144.343149.556150.858144.013144.82155.855154.365148.885144.539151.056146.619127.471123.872125.944126.004117.5115.448100.005101.47495.26290.4188.10488.10778.75971.2370.07465.319NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 TTM Greenblatt ROC _ _█▇▇▇▇▆▇█▇▆▇▇▆▄▆▆▅▄▄▅▅▄▄▅▃▃▄▄▄▃▃▄▃▂▃▃▂▁▂▂▁▁87.974.882.680.976.070.981.790.973.362.774.47774.29765.68245.69260.79760.8759.46143.60845.85555.4150.70437.75742.86251.46532.7125.07139.45740.88338.64827.28230.50836.88832.83823.73426.68236.49619.6549.94713.46913.73610.7956.399NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:ComprehensiveIncomeNetOfTax █▆▇▇▆▆▆▇▆▅▆▆▅▅█▅▅▄▄▅▄▄▄▄▃▅▄▄▄▃▅▄▃▄▃▄▃▃▃▃▃▂▁▃▂65.545.559.355.350.441.341.155.044.133.844.60648.90430.92630.56768.08736.63936.2423.09321.48730.18824.92118.74418.2325.21515.15535.45818.80519.1420.63613.91732.91121.6837.81823.42112.10318.1166.7876.486.3695.7466.4953.645-13.8523.94-0.055
us-gaap:CostOfGoodsAndServicesSold ▇███▆▇█▇▇▆▆▆▅▂▁▁▁698.6744.7734.8740.9676.0709.6735.7711.3687.1659.8657.754636.277614.663467.5458.358448.733440.376NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit ███▇▇████▇▇▇▇▆▆▆▆▅▅▆▆▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁▁276.3281.0276.6271.0260.8280.9289.5291.4285.2263.9271.896270.172263.846217.737220.677218.315212.937198.144198.195207.12202.086187.782192.932191.404158.534135.875153.534155.606152.727137.588129.753130.616124.567113.274121.282119.03988.95455.04853.62954.52848.79443.15442.23441.10335.296
us-gaap:IncomeLossFromContinuingOperations █▁▄▃64.248.755.452.3NANA39.357.543.134.945.92649.21733.60129.2467.37734.87933.23622.38224.0629.77526.01317.34819.17324.89114.33513.02321.7922.01320.69914.04817.42520.2097.82210.6112.00414.6566.0775.047NANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▇█▇▇▇▆█▇▆▇▇▅▅▆▆▆▅▅▆▅▄▅▅▄▄▅▅▅▄▄▅▃▃▄▄▃▃▃▃▃▂▁▂▂78.565.673.371.666.359.551.178.259.348.260.22859.69145.10939.14754.82153.77153.39435.10738.80647.11642.74528.73233.76441.92224.22322.00436.25937.78235.54523.95427.43133.63113.68218.40320.74530.21214.7539.24612.75813.00410.0155.686-12.015.8481.757
us-gaap:IncomeTaxExpenseBenefit █▇▇█▇▇▆█▇▆▇▆▆▆▁██▆▇▇▇▆▇▇▆▅▇▇▇▆▆▆▅▅▆▆▅▄▅▅▄▄▄▄▄21.216.917.919.317.515.711.820.716.213.314.30210.47411.5089.907-12.55618.89220.15812.72514.74617.34116.73211.38414.59117.0319.8888.98114.00615.76914.8469.90611.71713.4225.867.7939.42312.7796.2383.8635.2575.2374.152.5221.6882.6850.817
us-gaap:IncomeTaxesPaid █▁15.12.6NANA4.11.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxesPaidNet NANA23.535.44.11.220.015.619.41.611.2155.5843.4551.14517.6116.92719.8530.93614.21613.1196.9293.92614.88310.17719.2761.14213.6513.4958.14121.03412.5417.2298.7193.8618.61121.4632.8231.0187.0873.9982.9252.153-0.2380.11NA
us-gaap:InterestExpense ▄▄▄▄▄▅▅▅▆▆▆▆█▃▃▃▃▄▃▄▄▄▄▄▂▂▂▂▂▂▂▂▂▃▃▃▂▁▁▁▁▁▂▁▁9.49.29.39.39.711.411.712.714.014.514.24914.60620.5736.5455.9767.0996.0678.5017.0498.2947.9599.0259.0989.5434.7363.0673.1983.1013.1033.3283.0773.2574.1985.3315.8986.3174.9060.7020.7110.750.7840.733.5411.6011.607
us-gaap:InterestPaidNet ▆▂▆▂▆▃▄▅▅▆▆▆█▃▃▃▃▄▃▃▃▃▄▄▂▂▂▂▂▂▂▂▂▃▃▃▂▁▁▁▁▁▁▁15.22.415.22.715.04.77.911.612.612.813.13813.11419.3855.3295.0946.1815.3077.4926.0316.5017.0367.2617.5417.9434.1032.6952.8692.7912.8123.0873.2143.4093.8624.6735.1355.7193.2380.630.6410.6630.6950.661.1841.422NA
us-gaap:NetIncomeLoss █▆▇▇▆▆▆▇▆▅▆▆▅▅█▅▅▄▄▅▄▄▄▄▃▆▄▄▄▃▅▄▃▄▃▄▃▃▃▃▃▂▁▂▂64.248.755.452.348.843.839.357.443.134.945.88149.17233.56129.09267.33134.85633.09722.39124.02829.76826.00417.40119.33824.92514.25239.13520.47322.00520.78913.91732.4120.157.33924.61311.32217.4338.5155.3837.5017.7675.8653.164-13.6983.1630.94
us-gaap:OperatingIncomeLoss █▇▇▇▇▇▇█▇▆▇▇▆▅▆▆▆▅▅▆▅▄▅▅▄▃▄▄▄▄▄▄▄▃▃▄▃▂▃▃▂▂▁▂▂87.974.882.680.976.070.981.790.973.362.774.47774.29765.68245.69260.79760.8759.46143.60845.85555.4150.70437.75742.86251.46532.7125.07139.45740.88338.64827.28230.50836.88832.83823.73426.68236.49619.6549.94713.46913.73610.7956.399-8.5397.4423.332
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▂▇█▇▆▁▆▁▅▃▃▄▁▅-1.33.23.93.01.6-2.51.8-2.41.0-1.1-1.203-0.3-2.71.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▂▇█▇▆▁▆▁▅▃▃▄▁▅-1.33.23.93.01.6-2.51.8-2.41.0-1.1-1.203-0.3-2.71.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ████▇████▇▇▇▇▅▅▅▅▅▅▅▅▅▅▅▄▃▄▄▄▄▃▃▃▃▃▃▂▁▁▁▁▁▁▁▁974.91025.71011.41011.9936.8990.51025.21002.7972.3923.7929.65906.449878.509685.173679.035667.048653.313626.528620.884629.401608.088582.04577.517572.123485.323430.045475.808477.824468.618439.274423.598432.171417.923389.193401.659388.283283.186167.078161.79162.37143.683129.438121.152116.141104.459
us-gaap:SellingGeneralAndAdministrativeExpense ▇█▇▇▇█████▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▂▁▁▁▁▁▁▁176.4194.0179.9177.2172.2197.9195.5188.6198.8187.4183.602177.335179.616164.444151.447149.197145.177146.072142.63141.968141.35139.881138.754128.614118.867105.935106.479108.705107.923104.13483.54388.52986.45484.16176.58482.54369.345.10140.1640.79237.99936.75535.37433.66131.964
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ███▇▇▇▇▇▆▇▆▆▆▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁3458.83334.53278.03211.63065.53017.52941.42831.62799.02814.62687.8512664.592675.0341858.1591810.1291804.8681766.6441752.0871752.6671762.161777.7151777.0551767.3071796.81797.1341217.6381274.1741267.0551275.5791254.4041261.1941118.4821089.0331093.4361098.0211098.9351094.748419.989410.665406.729383.673NA341.116NANA
us-gaap:Liabilities ████▇▇▇▇▇▇▇▇▇▄▄▄▄▄▄▄▄▅▅▅▅▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁1739.01688.71690.91687.41608.41618.01565.21500.11515.31587.31505.7891534.7661606.292827.943818.738879.89839.282865.777883.728900.92936.784965.618982.5131038.2121072.038542.81639.766624.04590.319593.89621.061515.476514.834531.653565.298582.48604.162163.973163.922168.061150.745NA121.629NANA
us-gaap:LiabilitiesAndStockholdersEquity ███▇▇▇▇▇▆▇▆▆▆▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁3458.83334.53278.03211.63065.53017.52941.42831.62799.02814.62687.8512664.592675.0341858.1591810.1291804.8681766.6441752.0871752.6671762.161777.7151777.0551767.3071796.81797.1341217.6381274.1741267.0551275.5791254.4041261.1941118.4821089.0331093.4361098.0211098.9351094.748419.989410.665406.729383.673NA341.116NANA
us-gaap:StockholdersEquity ██▇▇▇▆▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▁▁▁▁1719.81645.81587.11524.21457.11399.51376.21331.51283.71227.31182.0621129.8241068.7421030.216991.391924.978927.362886.31868.939861.24840.931811.437784.794758.588725.096674.828634.408643.015685.26660.514640.133603.006574.199561.783532.723516.455490.586256.016246.743238.668232.928NA219.487NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AssetsCurrent █▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁1371.61074.2994.4934.7854.6789.7791.5747.1697.1691.4686.372646.599637.305552.271499.523485.754462.68441.984437.524434.482442.226432.168414.208432.104417.698409.771385.904371.608373.673347.631349.874332.321301.921295.36293.757284.894279.142138.305131.114123.984114.729NA95.646NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ██▆▅▅▂▃▂▂▁▂▂▂▂▁▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁375.4386.5274.4229.7207.964.095.267.540.135.641.82640.88844.65777.936.66727.97718.96324.00527.04416.97234.78228.36923.86928.91641.86376.36331.71429.88130.75323.39437.3545.07714.11111.77427.47913.87318.42317.68517.73913.24519.18315.82118.40930.27830.483
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ██▃▁375.4386.5274.4229.7NANA95.2NANANANANANANA36.667NANANA27.044NANANA23.869NANANA31.714NANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent NANA678.7NA612.1683.0648.7650.5621.5618.7613.825572.864558.04443.338428.536432.718417.267394.394386.858393.843383.722378.087354.808358.649330.958287.759298.761296.506295.935277.553262.224267.231266.567257.196243.003247.731238.535102.02693.92596.48580.831NA62.518NANA
us-gaap:ReceivablesNetCurrent ▁▄██624.7646.9678.7676.5NANA648.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsCurrent ▇█▇▇▇█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▄▄▄▄▂▂▂▂▂▁▂▄▂▂▂▂▂▁▁16.920.618.018.218.721.14.44.25.65.04.2644.3514.25.0493.0263.1033.1173.0483.293.583.2483.5859.6078.9788.76411.163.1213.213.093.0553.22.4763.7039.5284.2894.8124.2933.4943.3161.6951.495NA1.406NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:PropertyPlantAndEquipmentGross NANA263.3NANANA238.7NANANA204.518NANANA154.193NANANA129.286NANANA115.185NANANA98.038NANANA79.352NANANA62.034NANANA47.88NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType asgn:ComputerhardwareandsoftwareDomainNANA201.6NANANA180.2NANANA159.357NANANA115.444NANANA96.138NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType asgn:WorkInProgressNANA4.8NANANA7.0NANANA3.69NANANA4.565NANANA5.522NANANA4.139NANANA12.287NANANA14.929NANANA9.937NANANA4.751NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA28.0NANANA26.8NANANA22.242NANANA17.556NANANA14.956NANANA14.445NANANA11.972NANANA8.409NANANA6.891NANANA5.776NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA28.9NANANA24.7NANANA19.229NANANA16.628NANANA12.67NANANA10.551NANANA7.007NANANA6.059NANANA5.417NANANA4.633NANANANANANA
us-gaap:AmortizationOfIntangibleAssets ▅▆▆▆▆▆▆▅▆▆▆██▄▄▄▄▄▅▅▅▅▅▅▄▃▃▃▃▃▃▃▃▃▅▂▂▁▁▁▁▁▁▁12.012.214.112.912.612.112.311.913.113.813.81718.5418.5487.6018.4338.2488.2998.4649.719.74210.03210.14411.31611.3256.9574.8696.0556.0186.1566.1725.8985.1995.2755.37911.8573.32.20.6340.7130.70.60.4160.520.522NA
us-gaap:PropertyPlantAndEquipmentNet ▅▆▆▇▇█▇▇▇▇▇██▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▃▃▃▂▂▂▂▂▁▁▁▁54.268.369.474.279.280.073.772.675.277.079.12381.67283.98657.06757.99658.23159.859.56856.94257.77856.0254.48153.19651.76751.72844.95446.81943.49542.240.19338.59133.48130.55227.74226.86225.3223.94819.0618.05717.46617.515NA15.818NANA
us-gaap:Goodwill ▇█████▇▇▇▇▇▇▇▄▄▄▄▄▄▄▄▄▄▄▄▂▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁1475.51617.51618.41590.91547.31547.01486.91444.71445.61445.51421.0761420.6361420.012894.888894.095893.776875.431873.872873.513875.015874.919875.657874.906875.714878.862510.164570.697574.023574.951575.225574.948496.553495.638497.58498.356497.013474.639230.895229.234229.928216.401NA199.72NANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:Trademarks,asgn:TheCreativeCircleNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▇▇██▇█▇▇▇████▅▆▆▆▆▆▆▆▆▇▇▇▄▄▄▅▅▅▄▄▄▄▅▅▁▁▁▁475.5475.6487.9496.8474.6487.1476.5464.9476.9493.4488.691502.557521.198345.37352.766361.14361.54369.339377.73388.061397.787408.099417.925429.621440.885245.41262.569269.821276.104282.282288.455248.069253.106258.324263.84275.585301.15629.73130.20631.12530.365NA25.17NANA
us-gaap:FiniteLivedIntangibleAssetsNet ▇▆▇▇▆▇▆▆▇▇▇▇█▂▂▃▃▃▃▄▄▄▅▅▆▁▁▂▂▂▂▁▂▂▂▂▃232.9216.7229.0237.9215.7228.2217.6206.0218.0231.3226.469240.289258.90799.393106.824115.191115.76123.774132.213142.342152.099162.338172.295183.923195.22167.08577.74483.97590.04396.207102.3876.15381.31786.57591.988103.799129.429NA5.158NANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▅▇▇████▇▇█▁60.676.284.993.290.395.494.685.787.791.40.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇███▇▆▆▆▆▆▅▅▅▃▂▂▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▅▅▆▆▁▁▂▂21.422.723.021.819.518.318.216.616.515.912.58913.12612.5338.5635.7495.9677.1937.3246.9586.8246.7636.657.0727.5947.9617.3398.1858.1088.6519.0739.3268.0587.81614.4315.20616.12315.8631.9982.0544.2264.663NA4.762NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AccountsPayableCurrent ▅▅▆█▆▆▆▄▄▅▇▅▄▃▁▁▁▁▁▁▁▁▂▁▂▁▂▁▁▁▂▁▁▁▁▁▁▁▁▂▂33.129.939.850.137.533.739.227.124.127.843.12528.92126.98314.4676.876.1646.3147.3426.2666.0215.5546.1649.1326.6867.966.1578.8767.1665.5455.6878.376.3885.5995.4536.815.3786.0525.7814.1129.097.85NA5.392NANA
us-gaap:LiabilitiesCurrent █▇▇▆▆▆▆▆▅▅▅▅▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁498.4428.9416.2389.4357.3361.2340.9353.4326.5313.7308.249291.417279.12182.748166.717189.196178.377167.659162.499174.098177.607175.754160.35182.149171.147154.691165.566172.188170.558157.168169.021139.065127.077128.899118.727129.48125.82362.54156.40964.98560.246NA45.05NANA
us-gaap:OperatingLeaseLiabilityCurrent ▆▇██▇▇▇▇▇▇▁22.628.029.431.027.627.125.825.025.826.30.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent █▇▆▆▇▇▅▄▄▃▄▄▄▃▃▂▂▂▃▂▃▄▄▃▄▂▂▂▂▂▃▂▂▂▂▂▂▁▁▁▁102.186.380.971.885.784.955.344.849.838.449.52441.48150.0529.66929.00924.37323.93420.20227.59325.02730.24740.63747.42539.21843.41617.7421.77622.44423.61723.06827.90616.01116.31417.94715.06516.51518.8288.2576.5645.8814.626NA4.193NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt ▆▆▆▆▆▆▆▅▆▇▇▇█▁▁▁▁▂▂▂▂▃▃▃▄1033.71033.71033.41033.21032.91065.51032.3985.21026.01107.71100.4241154.1541240.886565.929575.2609.997579.782617.068640.355658.642691.93723.219755.5784.797830.085NA411.857NANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent NANA1033.4NA1032.91065.51032.3985.21026.01107.71100.4241154.1541240.886565.929575.213609.997579.782617.068640.355658.642691.93723.219755.508784.797830.085316.313396.875385.438358.5375.563389.813347.813359.063373.588416.588429.088452.93875.581.7583.072.25NA61.75NANA
us-gaap:DeferredTaxLiabilitiesNoncurrent ████▇▇▇▆▆▆▆▅▅▅▅▆▆▆▆▅▅▅▅▅▅▅▅▄▄▄▄▂▂▂▂▁▁▁▁▁▁108.5108.6108.7107.298.698.698.778.778.979.779.83371.71268.75569.43969.43674.8674.36674.26774.28261.7361.55361.61261.53966.14265.71263.73467.90954.79949.52549.55949.58422.96322.91322.96623.00915.67415.73315.86314.8569.8969.962NA10.156NANA
us-gaap:DeferredIncomeTaxLiabilitiesNet NANA108.7NANANA98.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▅▆▇█▅▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁54.462.569.787.450.117.717.616.216.215.617.28317.48317.5319.8277.3725.8376.7576.7836.5926.455.6945.0335.1165.1245.0948.0729.41611.61511.73611.612.6435.6355.7816.25.965.7245.1223.3624.5394.3723.727NA1.773NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▅▆▇▇▇██▇▇█▁44.055.062.970.269.575.075.766.667.770.60.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA25.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA20.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA12.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA5.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA2.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity ██▇▇▇▆▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▁▁▁▁1719.81645.81587.11524.21457.11399.51376.21331.51283.71227.31182.0621129.8241068.7421030.216991.391924.978927.362886.31868.939861.24840.931811.437784.794758.588725.096674.828634.408643.015685.26660.514640.133603.006574.199561.783532.723516.455490.586256.016246.743238.668232.928NA219.487NANA
us-gaap:CommonStockValue ▆▆▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇██▇▇▇▇▇▇██████▇▇▇▁▁▁▁0.50.50.50.50.50.50.50.50.50.50.5250.5240.5230.5230.5210.520.5280.5280.5270.5310.5350.5330.530.5280.5260.5170.5140.5230.5440.5430.5390.5380.5350.5320.530.5250.5190.3760.370.3690.37NA0.365NANA
us-gaap:AdditionalPaidInCapitalCommonStock ████▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▁▁▁▁683.0674.5661.3657.7645.9638.7638.0634.4625.5613.2601.754594.123581.946574.346566.09567.731569.646564.834562.862561.684557.97550.755542.859533.48525.205490.101483.902489.254503.848499.739493.279489.064481.943477.348471.711467.551459.804232.164229.377227.648227.439NA224.139NANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▆▆▆▅▅▅▅▄▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁1039.2975.0926.3870.9818.6769.8744.7705.4664.1621.0586.125540.244491.072457.511428.419361.122363.366330.269315.573306.507290.328266.968249.567231.634206.709192.457154.562156.14180.905160.116146.199113.78993.63986.361.68750.36532.93224.41719.03411.5574.008NA-5.021NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▅▇▄▂▁▃▂▃▃▃▄▄▆▅▅▃▁▁▃▂▃▂▃▃▂▄▅▇▇▇▇▆▆▇▆▆▇▆▇█-2.9-4.2-1.0-4.9-7.9-9.5-7.0-8.8-6.4-7.4-6.342-5.067-4.799-2.164-3.639-4.395-6.178-9.321-10.023-7.482-7.902-6.819-8.162-7.054-7.344-8.247-4.57-2.902-0.0370.1160.116-0.385-1.918-2.397-1.205-1.986-2.669-0.941-2.038-0.9061.111NA0.004NANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▆▅▄▃▄▄▄▃█▅▄▄▄▁10.810.38.27.18.28.98.17.813.610.08.8918.58.74.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▅▅█▄▄▅▅▃▄▅▄▃▄▃▃▃▃▃▄▃▃▃▃▂▃▃▃▁▃▃▂▂▂▂▁▂▂▂▂▂▂▂84.9119.887.087.6186.164.181.491.396.544.063.8992.08276.74654.73358.25954.59439.79343.855.90242.70260.33237.31430.19634.87732.47719.94328.06442.94929.33-4.32136.57643.62126.7523.57526.05823.531-15.8656.9738.3652.1097.1675.7786.4595.929NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▇▇▇▇▆▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇▇▇▃█▇▇▇▇▆▇▇▇▇▇▄▇▇▇▇▇▇▇-94.0-9.4-38.9-71.7-7.4-101.0-77.7-6.1-8.3-57.0-6.207-7.296-769.012-6.218-6.251-30.51-6.581-6.775-6.646-7.079-7.153-1.106-6.015-4.246-558.165106.896-5.825-4.503-5.342-3.89-86.383-4.694-1.69724.419-2.455-5.3-353.14-2.071-2.66-16.959-2.316-19.185-2.306-6.227NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▂▁▂▂▁▁▂▁▁█▂▁▂▁▁▁▁▁▂▂▁▆▁▂▁▂▂▂▂▂▁▂▂▅▂▂▂▂▂▂▂-2.82.9-4.64.8-35.36.123.5-57.1-84.37.4-56.218-88.466660.15-7.667-43.652-15.525-39.077-40.215-38.86-53.656-46.815-31.653-28.808-43.775491.729-81.487-20.115-38.718-16.9-5.35942.142-8.269-22.843-43.42-10.164-22.816370.042-5.184-0.9249.315-2.39511.513-15.94-0.162NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂▇▄▃█▁▃▃▂▂-11.1112.144.721.8143.9-31.227.727.44.5-6.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:DepreciationDepletionAndAmortization ▇▇▇▇▇▇▇▇▇▇▇██▅▆▅▅▅▆▆▆▆▆▆▅▄▅▄▄▄▄▄▄▄▁▄▄▃21.422.024.1000000000000122.59999999999999421.621.422.422.223.123.523.67728.29928.58614.41315.11114.65114.36714.47516.07815.3415.40415.42716.07415.68211.1488.66510.2079.6269.5048.9598.2247.2247.197.244-9.3238.4965.4642.063NANANANANANANA
us-gaap:IncreaseDecreaseInAccountsPayable ▆▃▂█▆▄▇▆▄▁██▃▆▅▅▅▅▅▅▅▄▆▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▄▅▅▅▅▅4.2-10.0-12.513.53.7-3.910.63.1-3.7-17.313.42813.134-9.0675.8250.45-0.177-0.670.7121.289-0.345-0.89-2.292.74-0.898-0.3630.2050.1331.0460.134-3.006-1.1950.864-0.16-1.0891.1860.193-0.6981.306-4.7691.2390.6241.0940.1670.245NA
us-gaap:IncreaseDecreaseInAccountsReceivable █▃▆▆▁▆▄▆▅▄▇▅▆▅▅▅▆▅▄▅▅▆▅▆▅▅▅▅▆▅▄▅▅▆▄▅▆▄▇▄▄▄▆▄66.3-30.331.322.1-71.030.5-6.031.33.6-4.642.84915.8118.48313.526-1.47516.71425.06810.154-4.09612.8269.19725.362-0.93830.3129.81714.5845.0283.26620.59116.476-13.8370.6637.21626.113-5.6288.75223.209-7.72951.894-13.189-6.116-7.5118.79-6.834NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▅▅█▄▄▅▅▃▄▅▄▃▄▃▃▃▃▃▄▃▃▃▃▂▃▃▃▁▃▃▂▂▂▂▁▂▂▂▂▂▂▂84.9119.887.087.6186.164.181.491.396.544.063.8992.08276.74654.73358.25954.59439.79343.855.90242.70260.33237.31430.19634.87732.47719.94328.06442.94929.33-4.32136.57643.62126.7523.57526.05823.531-15.8656.9738.3652.1097.1675.7786.4595.929NA
us-gaap:NetIncomeLoss █▆▇▇▆▆▆▇▆▅▆▆▅▅█▅▅▄▄▅▄▄▄▄▃▆▄▄▄▃▅▄▃▄▃▄▃▃▃▃▃▂▁▂▂64.248.755.452.348.843.839.357.443.134.945.88149.17233.56129.09267.33134.85633.09722.39124.02829.76826.00417.40119.33824.92514.25239.13520.47322.00520.78913.91732.4120.157.33924.61311.32217.4338.5155.3837.5017.7675.8653.164-13.6983.1630.94
us-gaap:ShareBasedCompensation ▆▅▄▃▄▄▄▃█▅▄▄▄▁▂▂▂▂▃▂▂▃10.810.38.3999999999999977.08.28.78.27.813.89.59.1088.6198.874.8916.1016.3825.9915.577.2216.3456.5346.924NA6.0545.2363.9544.3084.6064.0953.194.0014.23.4862.7243.1323.0752.3081.1911.8431.8381.6211.6252.4312.099NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▇▇▇▇▆▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇▇▇▃█▇▇▇▇▆▇▇▇▇▇▄▇▇▇▇▇▇▇-94.0-9.4-38.9-71.7-7.4-101.0-77.7-6.1-8.3-57.0-6.207-7.296-769.012-6.218-6.251-30.51-6.581-6.775-6.646-7.079-7.153-1.106-6.015-4.246-558.165106.896-5.825-4.503-5.342-3.89-86.383-4.694-1.69724.419-2.455-5.3-353.14-2.071-2.66-16.959-2.316-19.185-2.306-6.227NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▅▂▃▄█▅▄▅▄▄▄▅▃▃▃▄▄▄▄▄▄▄▃▃▄▃▃▃▂▂▃▃▂▂▂▃▁▂▁▁▂▁▁8.39.34.35.77.315.39.96.98.47.56.6087.58.3956.1986.2274.836.4166.7926.5876.6426.6277.2826.5124.8465.3318.05.4694.6225.6184.024.2384.9654.5432.7853.4713.7125.0522.1192.3651.3742.0222.652.1081.358NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▂▁▂▂▁▁▂▁▁█▂▁▂▁▁▁▁▁▂▂▁▆▁▂▁▂▂▂▂▂▁▂▂▅▂▂▂▂▂▂▂-2.82.9-4.64.8-35.36.123.5-57.1-84.37.4-56.218-88.466660.15-7.667-43.652-15.525-39.077-40.215-38.86-53.656-46.815-31.653-28.808-43.775491.729-81.487-20.115-38.718-16.9-5.35942.142-8.269-22.843-43.42-10.164-22.816370.042-5.184-0.9249.315-2.39511.513-15.94-0.162NA
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA0.00.00.065.5594.09.06.044.00.00.0822.00.00.035.00.02.04.00.07.00.00.00.0875.00.021.043.50.099.546.00.0383.50.00.023.0NANA0.015.0NANANANANA
us-gaap:RepaymentsOfLongTermDebt NANA0.00.033.032.5558.251.089.038.055.088.0133.010.035.55.538.026.023.034.039.033.030.046.0359.56280.5639.56316.56217.063105.54.011.5397.77543.012.550.5103.9136.251.254.251.2513.7579.1630.0NA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.027.90.020.00.00.00.00.00.00.01.11646.8130.012.13619.62618.6832.7870.0-0.0010.0010.01.64531.81468.2350.00.00.0NANANA0.0NANANA0.205NANANA2.0NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0525000.0524000.0523000.0523000.0521000.0520000.0528000.0528000.0527000.0531000.0535000.0533000.0530000.0528000.0526000.0517000.0514000.0523000.0544000.0543000.0539000.0538000.0535000.0532000.0530000.0525000.0519000.0376000.0370000.0369000.0370000.0365000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.1

Common Stock Par Or Stated Value Per Share

us-gaap:CommonStockParOrStatedValuePerShare

us-gaap:CommonStockParOrStatedValuePerShare


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.010.010.010.01000.010000.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.01
Percentage of CommonStockParOrStatedValuePerShare100.0100.0100.0100.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Preferred Stock Par Or Stated Value Per Share

us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:PreferredStockParOrStatedValuePerShare


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.010.010.010.01000.010000.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.01
Percentage of PreferredStockParOrStatedValuePerShare100.0100.0100.0100.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5353525252525252525252525252
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesIssued

us-gaap:CommonStock


Common
Period End2021-03-312020-12-312020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value535252525252525351535237363638
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value535352525252525252525252525252515252525353535352525151525454535353535252513737363736
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value5353535353535353535352535353535353535252545554545454534538370.03771837360.03715
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value5353525252525252525252525252535353525151535454535353524437370.03697136360.036427
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.210.921.051.00.930.830.751.090.820.660.880.940.640.561.290.660.630.430.450.560.490.330.370.470.270.760.390.410.380.260.60.380.140.460.220.330.190.140.20.210.160.09-0.370.090.03
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.190.911.030.990.920.820.741.080.810.660.860.930.630.551.270.660.620.420.450.550.480.320.360.470.270.750.390.410.380.250.590.370.140.460.210.330.190.140.20.210.160.08-0.370.090.03
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2021-06-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.080.830.880.940.640.561.290.660.630.430.450.560.490.330.360.470.280.250.420.410.380.260.320.380.150.20.230.280.140.14
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2021-06-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.060.820.860.930.630.551.280.660.620.420.450.550.480.320.360.470.270.250.410.410.380.260.320.370.140.20.220.280.130.13
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value65455955504141554433444830306836362321302418182515351819201332217.8182312186.7876.486.3695.7466.4953.645-13.8523.94-0.055
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.74.45.95.55.44.24.05.54.53.74.85.43.54.510.05.55.53.73.54.84.13.23.24.43.18.24.04.04.43.27.85.01.96.03.04.72.43.93.93.54.52.8-11.43.4-0.1

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value698744734740676709735711687659657636614467458448440
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues71.772.672.773.272.271.671.870.970.771.470.870.270.068.267.567.367.4

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value276281276271260280289291285263271270263217220218212198198207202187192191158135153155152137129130124113121119885553544843424135
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues28.327.427.326.827.828.428.229.129.328.629.229.830.031.832.532.732.631.631.932.933.232.333.433.532.731.632.332.632.631.330.630.229.829.130.230.731.432.933.133.634.033.334.935.433.8

us-gaap:GrossProfit us-gaap:StatementBusinessSegments

asgn:ApexSegment


Gross
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value182182173170184190192187175181177169158160155150139140143138126131128977987878475696963555656260.00.00.00.0
Percentage of GrossProfit64.866.163.865.465.765.866.065.866.566.865.864.372.972.771.470.570.670.969.468.467.268.167.361.658.657.256.155.454.953.353.251.349.146.847.830.30.00.00.00.0
Percentage of Revenues17.718.117.118.218.618.619.219.319.019.519.619.323.223.623.423.022.322.622.822.721.722.822.520.118.518.518.318.117.216.316.115.314.314.114.79.50.00.00.00.0
Percentage of Revenues asgn:ApexSegment28.90.029.029.629.30.029.829.928.90.030.229.929.50.030.129.929.00.030.330.529.10.030.628.827.10.028.528.427.10.028.227.426.10.028.127.30.00.00.00.0

asgn:CommercialBusiness


Gross
Period End2021-06-302020-06-30
Value228183
Percentage of GrossProfit82.670.4
Percentage of Revenues23.419.6
Percentage of Revenues asgn:CommercialBusiness32.031.0

asgn:ECS


Gross
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4542454337393734292829280.0
Percentage of GrossProfit16.015.216.916.813.213.612.812.211.210.511.010.90.0
Percentage of Revenues4.44.24.54.73.73.83.73.63.23.13.33.30.0
Percentage of Revenues asgn:ECS17.50.015.918.317.40.018.118.317.60.018.018.50.0

asgn:FederalGovernmentBusiness


Gross
Period End2021-06-302020-06-30
Value4843
Percentage of GrossProfit17.416.8
Percentage of Revenues4.94.7
Percentage of Revenues asgn:FederalGovernmentBusiness18.318.3

asgn:OxfordSegment


Gross
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value54515246595961625861626559606262585763636161626053515453494234343231313127252523
Percentage of GrossProfit19.218.719.217.821.120.621.221.922.322.623.224.827.127.328.629.529.429.130.631.632.831.932.738.439.433.734.935.135.632.426.527.728.426.226.335.649.747.546.148.0
Percentage of Revenues5.35.15.15.06.05.86.26.46.46.66.97.58.68.99.49.69.39.310.110.510.610.611.012.512.410.911.411.411.29.98.08.38.37.98.011.216.415.815.516.3
Percentage of Revenues asgn:OxfordSegment39.30.041.038.639.90.040.640.839.40.041.142.040.30.041.841.640.40.040.741.441.40.041.541.542.00.043.142.541.70.034.734.033.70.035.535.934.80.035.835.8

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperations


Income
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value6448555239574334454933296734332224292617192414132122201417207.8221012146.0775.047
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.64.75.55.23.85.74.43.84.95.43.84.39.95.25.13.63.94.74.33.03.34.43.03.04.64.64.43.24.14.71.92.73.03.82.13.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value786573716659517859486059453954535335384742283341242236373523273313182030149.2461213105.686-12.015.8481.757
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.16.47.27.17.16.05.07.86.15.26.56.65.15.78.18.18.25.66.37.57.04.95.87.35.05.17.67.97.65.56.57.83.34.75.27.85.25.57.98.07.04.4-9.95.01.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value211617191715112016131410119.907-12.5561820121417161114179.8888.9811415149.90611135.867.7939.423126.2383.8635.2575.2374.152.5221.6882.6850.817
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.21.61.81.91.91.61.22.11.71.41.51.21.31.4-1.82.83.12.02.42.82.82.02.53.02.02.12.93.33.22.32.83.11.42.02.33.32.22.33.23.22.91.91.42.30.8

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value152.64.11.2
Percentage of IncomeTaxesPaid100.0100.0100.0100.0
Percentage of Revenues1.50.30.40.1

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value23354.11.22015191.6115.5843.4551.1451716190.93614136.9293.9261410191.14213138.14121127.2298.7193.8618.611212.8231.0187.0873.9982.9252.153-0.2380.11
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.33.50.40.12.01.62.00.21.20.60.40.22.62.53.00.12.32.11.10.72.61.84.00.32.92.81.74.83.01.72.11.02.15.51.00.64.42.52.01.7-0.20.1

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9.49.29.39.39.711111214141414206.5455.9767.0996.0678.5017.0498.2947.9599.0259.0989.5434.7363.0673.1983.1013.1033.3283.0773.2574.1985.3315.8986.3174.9060.7020.7110.750.7840.733.5411.6011.607
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.00.90.90.91.01.21.11.31.41.61.51.62.31.00.91.10.91.41.11.31.31.61.61.71.00.70.70.60.70.80.70.81.01.41.51.61.70.40.40.50.50.62.91.41.5

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value152.4152.7154.77.91112121313195.3295.0946.1815.3077.4926.0316.5017.0367.2617.5417.9434.1032.6952.8692.7912.8123.0873.2143.4093.8624.6735.1355.7193.2380.630.6410.6630.6950.661.1841.422
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.60.21.50.31.60.50.81.21.31.41.41.42.20.80.80.90.81.21.01.01.21.21.31.40.80.60.60.60.60.70.80.80.91.21.31.51.10.40.40.40.50.51.01.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value64485552484339574334454933296734332224292617192414392022201332207.3392411178.5155.3837.5017.7675.8653.164-13.6983.1630.94
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.64.75.55.25.24.43.85.74.43.84.95.43.84.29.95.25.13.63.94.74.33.03.34.42.99.14.34.64.43.27.74.71.86.32.84.53.03.24.64.84.12.4-11.32.70.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6448555248433957433445493329
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.199.9100.1100.0
Percentage of Revenues6.64.75.55.25.24.43.85.74.43.84.95.43.84.2
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value877482807670819073627474654560605943455550374251322539403827303632232636199.9471313106.399-8.5397.4423.332
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues9.07.38.28.08.17.28.09.17.56.88.08.27.56.79.09.19.17.07.48.88.36.57.49.06.75.88.38.68.26.27.28.57.96.16.69.46.96.08.38.57.54.9-7.06.43.2

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

asgn:ApexSegment


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value6874696667747972616971645659595646505350394648342233333122302016106.99916-1.9690.00.00.00.0
Percentage of OperatingIncomeLoss91.690.085.886.894.691.387.199.597.393.696.298.8123.197.697.095.5107.5111.297.499.0105.9108.093.5104.691.483.982.582.083.599.854.350.042.526.245.4-10.00.00.00.00.0
Percentage of Revenues6.77.36.97.06.87.37.97.56.67.57.97.48.28.78.88.77.58.28.68.36.98.08.47.15.37.07.16.85.27.24.63.92.61.74.3-0.70.00.00.00.0
Percentage of Revenues asgn:ApexSegment10.90.011.611.410.70.012.311.610.10.012.111.410.40.011.411.39.70.011.411.19.20.011.410.17.80.011.010.68.20.08.17.04.70.08.2-2.00.00.00.00.0

asgn:CommercialBusiness


Operating
Period End2021-06-302020-06-30
Value8965
Percentage of OperatingIncomeLoss101.985.9
Percentage of Revenues9.27.0
Percentage of Revenues asgn:CommercialBusiness12.611.0

asgn:ECS


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14131616111112106.97.5144.33.70.0
Percentage of OperatingIncomeLoss19.816.620.621.315.914.314.014.911.010.15.85.60.0
Percentage of Revenues1.41.41.71.71.11.11.31.10.70.80.50.40.0
Percentage of Revenues asgn:ECS5.70.05.86.85.30.06.25.74.10.02.62.40.0

asgn:FederalGovernmentBusiness


Operating
Period End2021-06-302020-06-30
Value1816
Percentage of OperatingIncomeLoss21.321.4
Percentage of Revenues1.91.7
Percentage of Revenues asgn:FederalGovernmentBusiness7.16.8

asgn:OxfordSegment


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1112127.811121311111415149.8261416148.663101413121619181515181714191414111213157.2358.8029.0388.002
Percentage of OperatingIncomeLoss15.115.615.010.315.714.815.015.018.719.320.422.621.523.526.424.819.922.426.027.333.838.637.557.661.240.244.846.152.463.938.242.748.148.036.379.072.765.465.874.1
Percentage of Revenues1.11.31.20.81.11.21.41.11.31.51.71.71.42.12.42.31.41.72.32.32.22.93.43.93.63.33.83.83.34.63.33.42.93.23.45.54.35.45.65.6
Percentage of Revenues asgn:OxfordSegment8.20.09.56.57.50.08.97.27.80.09.99.56.70.010.89.86.00.09.39.08.60.012.812.812.00.014.514.112.20.014.113.812.00.015.017.69.20.012.912.3

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.33.23.93.01.6-2.51.8-2.41.0-1.1-1.203-0.3-2.71.5
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.10.30.40.30.2-0.30.2-0.20.1-0.1-0.1-0.0-0.30.2

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.33.23.93.01.6-2.51.8-2.41.0-1.1-1.203-0.3-2.71.5
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.10.30.40.30.2-0.30.2-0.20.1-0.1-0.1-0.0-0.30.2
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value97410251011101193699010251002972923929906878685679667653626620629608582577572485430475477468439423432417389401388283167161162143129121116104
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues asgn:RevenueType, us-gaap:StatementBusinessSegments

asgn:Assignment, asgn:ApexSegment


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value512538492483615628629613592590575553524524506491
Percentage of Revenues50.053.248.651.662.261.362.863.064.163.563.563.076.677.275.975.2
Percentage of Revenues50.053.248.651.662.261.362.863.064.163.563.563.076.677.275.975.2
Percentage of Revenues asgn:Assignment asgn:ApexSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:Assignment, asgn:CommercialBusiness


Revenuesasgn:
Period End2021-06-302020-06-30
Value568506
Percentage of Revenues58.354.1
Percentage of Revenues58.354.1
Percentage of Revenues asgn:Assignment asgn:CommercialBusiness100.0100.0

asgn:Assignment, asgn:OxfordSegment


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1171619596128131130131129129130130125123127128
Percentage of Revenues11.416.09.510.312.912.813.013.514.014.014.414.818.318.119.219.7
Percentage of Revenues11.416.09.510.312.912.813.013.514.014.014.414.818.318.119.219.7
Percentage of Revenues asgn:Assignment asgn:OxfordSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:Consulting, asgn:ApexSegment


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-03-312019-12-312019-09-30
Value11710996899285
Percentage of Revenues11.510.89.59.09.08.5
Percentage of Revenues11.510.89.59.09.08.5
Percentage of Revenues asgn:Consulting asgn:ApexSegment100.0100.0100.0100.0100.0100.0

asgn:Consulting, asgn:CommercialBusiness


Revenuesasgn:
Period End2021-06-302020-06-30
Value14485
Percentage of Revenues14.89.1
Percentage of Revenues14.89.1
Percentage of Revenues asgn:Consulting asgn:CommercialBusiness100.0100.0

asgn:Consulting, asgn:OxfordSegment


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-03-312019-12-312019-09-30
Value201814131515
Percentage of Revenues2.01.81.41.31.51.5
Percentage of Revenues2.01.81.41.31.51.5
Percentage of Revenues asgn:Consulting asgn:OxfordSegment100.0100.0100.0100.0100.0100.0

asgn:CostplusfixedfeeContract, asgn:ECS


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10610412594831067373638173610.0
Percentage of Revenues10.410.312.410.18.410.37.37.66.98.88.17.00.0
Percentage of Revenues10.410.312.410.18.410.37.37.66.98.88.17.00.0
Percentage of Revenues asgn:CostplusfixedfeeContract asgn:ECS100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

asgn:CostplusfixedfeeContract, asgn:FederalGovernmentBusiness


Revenuesasgn:
Period End2021-06-302020-06-30
Value10094
Percentage of Revenues10.310.1
Percentage of Revenues10.310.1
Percentage of Revenues asgn:CostplusfixedfeeContract asgn:FederalGovernmentBusiness100.0100.0

asgn:PermanentPlacement, asgn:ApexSegment


Revenuesasgn:
Period End2020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.3131214151313141313
Percentage of Revenues0.71.31.21.41.61.51.51.61.62.0
Percentage of Revenues0.71.31.21.41.61.51.51.61.62.0
Percentage of Revenues asgn:PermanentPlacement asgn:ApexSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:PermanentPlacement, asgn:OxfordSegment


Revenuesasgn:
Period End2020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17201822212021222521
Percentage of Revenues1.72.11.82.22.22.22.32.52.93.1
Percentage of Revenues1.72.11.82.22.22.22.32.52.93.1
Percentage of Revenues asgn:PermanentPlacement asgn:OxfordSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, asgn:ECS


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6070826357606446434048440.0
Percentage of Revenues5.97.08.16.85.85.96.44.74.74.35.35.10.0
Percentage of Revenues5.97.08.16.85.85.96.44.74.74.35.35.10.0
Percentage of Revenues us-gaap:FixedPriceContract asgn:ECS100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FixedPriceContract, asgn:FederalGovernmentBusiness


Revenuesasgn:
Period End2021-06-302020-06-30
Value6263
Percentage of Revenues6.46.8
Percentage of Revenues6.46.8
Percentage of Revenues us-gaap:FixedPriceContract asgn:FederalGovernmentBusiness100.0100.0

us-gaap:TimeAndMaterialsContract, asgn:ECS


Revenuesasgn:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9088808172676870615242490.0
Percentage of Revenues8.88.78.08.77.36.66.87.36.65.64.65.60.0
Percentage of Revenues8.88.78.08.77.36.66.87.36.65.64.65.60.0
Percentage of Revenues us-gaap:TimeAndMaterialsContract asgn:ECS100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:TimeAndMaterialsContract, asgn:FederalGovernmentBusiness


Revenuesasgn:
Period End2021-06-302020-06-30
Value10081
Percentage of Revenues10.38.7
Percentage of Revenues10.38.7
Percentage of Revenues us-gaap:TimeAndMaterialsContract asgn:FederalGovernmentBusiness100.0100.0

us-gaap:Revenues us-gaap:MajorCustomers

asgn:Commercialandother


Revenuesus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value22222016131111119.98.6
Percentage of Revenues2.32.12.01.81.31.11.21.31.11.0
Percentage of Revenues2.32.12.01.81.31.11.21.31.11.0
Percentage of Revenues asgn:Commercialandother100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:Departmentofdefenseandintelligenceagencies


Revenuesus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1411431721271141121079611310195
Percentage of Revenues14.514.017.013.611.611.211.110.412.311.210.9
Percentage of Revenues14.514.017.013.611.611.211.110.412.311.210.9
Percentage of Revenues asgn:Departmentofdefenseandintelligenceagencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:Federalcivilian


Revenuesus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9892969684827160475251
Percentage of Revenues10.19.09.510.28.58.27.36.55.15.85.8
Percentage of Revenues10.19.09.510.28.58.27.36.55.15.85.8
Percentage of Revenues asgn:Federalcivilian100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:StatementBusinessSegments

asgn:ApexSegment


Revenuesus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value630619596576629641644628606604589567538534517502482476473453433432421338294307306297278249246233212207202990.00.00.00.0
Percentage of Revenues61.561.258.961.663.562.664.264.665.665.065.164.678.678.777.676.977.076.775.274.674.475.073.669.868.464.764.063.663.459.057.055.954.751.752.235.00.00.00.00.0
Percentage of Revenues61.561.258.961.663.562.664.264.665.665.065.164.678.678.777.676.977.076.775.274.674.475.073.669.868.464.764.063.663.459.057.055.954.751.752.235.00.00.00.00.0
Percentage of Revenues asgn:ApexSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

asgn:CommercialBusiness


Revenuesus-gaap:
Period End2021-06-302020-06-30
Value712592
Percentage of Revenues73.163.2
Percentage of Revenues73.163.2
Percentage of Revenues asgn:CommercialBusiness100.0100.0

asgn:ECS


Revenuesus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2572632882392122332061901681731641550.0
Percentage of Revenues25.126.028.525.621.522.820.619.618.218.718.117.70.0
Percentage of Revenues25.126.028.525.621.522.820.619.618.218.718.117.70.0
Percentage of Revenues asgn:ECS100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

asgn:FederalGovernmentBusiness


Revenuesus-gaap:
Period End2021-06-302020-06-30
Value262239
Percentage of Revenues26.925.6
Percentage of Revenues26.925.6
Percentage of Revenues asgn:FederalGovernmentBusiness100.0100.0

asgn:OxfordSegment


Revenuesus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1371291271201481501521531491511521551461441491501441441551541481441511461271231251261171151001019590888878717065
Percentage of Revenues13.412.812.612.815.014.715.215.816.216.316.817.721.421.322.423.123.023.324.825.425.625.026.430.229.626.026.426.926.727.323.124.324.522.522.731.147.144.043.245.5
Percentage of Revenues13.412.812.612.815.014.715.215.816.216.316.817.721.421.322.423.123.023.324.825.425.625.026.430.229.626.026.426.926.727.323.124.324.522.522.731.147.144.043.245.5
Percentage of Revenues asgn:OxfordSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value176194179177172197195188198187183177179164151149145146142141141139138128118105106108107104838886847682694540403736353331
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues18.118.917.817.518.420.019.118.820.420.319.719.620.424.022.322.422.223.323.022.623.224.024.022.524.524.622.422.823.023.719.720.520.721.619.121.324.527.024.825.126.428.429.229.030.6

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3458333432783211306530172941283127992814268726642675185818101804176617521752176217771777176717961797121712741267127512541261111810891093109810981094419410406383341
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value173916881690168716081618156515001515158715051534160682781887983986588390093696598210381072542639624590593621515514531565582604163163168150121
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.350.651.652.552.553.653.253.054.156.456.057.660.044.645.248.847.549.450.451.152.754.355.657.859.744.650.249.346.347.349.246.147.348.651.553.055.239.039.941.339.335.7

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3458333432783211306530172941283127992814268726642675185818101804176617521752176217771777176717961797121712741267127512541261111810891093109810981094419410406383341
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value17191645158715241457139913761331128312271182112910681030991924927886868861840811784758725674634643685660640603574561532516490256246238232219226218
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 Assets49.749.448.447.547.546.446.847.045.943.644.042.440.055.454.851.252.550.649.648.947.345.744.442.240.355.449.850.753.752.750.853.952.751.448.547.044.861.060.158.760.764.30.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-2.9-4.2-1.0-4.9-7.9-9.5-7.0-8.8-6.4-7.4-6.342-5.1-4.8-2.1-3.639-10.023-8.162-4.570.116-1.205-2.0380.0041.1260.8
Percentage of StockholdersEquity-0.2-0.3-0.1-0.3-0.5-0.7-0.5-0.7-0.5-0.6-0.5-0.5-0.4-0.2-0.4-1.2-1.0-0.70.0-0.2-0.80.00.50.4
Percentage of Assets-0.1-0.1-0.0-0.2-0.3-0.3-0.2-0.3-0.2-0.3-0.2-0.2-0.2-0.1-0.2-0.6-0.5-0.40.0-0.1-0.50.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value683674661657645638638634625613601594581574566562542483493471229224220227
Percentage of StockholdersEquity39.741.041.743.244.345.646.447.648.750.050.952.654.455.857.164.869.276.377.188.593.0102.197.1104.1
Percentage of Assets19.720.220.220.521.121.221.722.422.321.822.422.321.830.931.332.130.738.039.143.055.965.70.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.50.50.50.50.50.50.50.50.50.50.5250.50.50.50.5210.5270.530.5140.5390.530.370.3650.3630.388
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.20.20.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value10399759268708187697447056646215865404914574283152491541466119-5.0215.0916
Percentage of StockholdersEquity60.459.258.457.156.255.054.153.051.750.649.647.846.044.443.236.331.824.422.811.67.7-2.32.27.4
Percentage of Assets30.029.228.327.126.725.525.324.923.722.121.820.318.424.623.718.014.112.111.65.64.6-1.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1371107499493485478979174769769168664663755249948546244143743444243241443241740938537137334734933230129529328427913813112311495
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.732.230.329.127.926.226.926.424.924.625.524.323.829.727.626.926.225.225.024.724.924.323.424.023.233.730.329.329.327.727.729.727.727.026.825.925.532.931.930.529.928.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value375386274229207649567403541404477362718242716342823284176312930233745141127131817171319151830302546
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.911.68.47.26.82.13.22.41.41.31.61.51.74.22.01.61.11.41.51.02.01.61.41.62.36.32.52.42.41.93.04.01.31.12.51.31.74.24.33.35.00.05.40.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312017-12-312016-12-312015-12-312014-12-31
Value3753862742299536272331
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.911.68.47.23.22.01.51.42.5

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value67861268364865062161861357255844342843241739438639338337835435833028729829629527726226726625724324723810293968062
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.720.022.622.123.022.222.022.821.520.923.923.724.023.622.522.122.421.621.320.120.018.423.623.423.423.222.120.823.924.523.522.122.521.824.322.923.721.118.3

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value624646678676648
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0
Percentage of Assets18.119.420.721.122.1

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1620181818214.44.25.65.04.2644.3514.25.0493.0263.1033.1173.0483.293.583.2483.5859.6078.9788.764113.1213.213.093.0553.22.4763.7039.5284.2894.8124.2933.4943.3161.6951.4951.406
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.50.60.60.70.10.10.20.20.20.20.20.30.20.20.20.20.20.20.20.20.50.50.50.90.20.30.20.20.30.20.30.90.40.40.40.80.80.40.40.4

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value26323820415412911598796247
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.08.17.68.57.46.57.76.35.611.7

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

asgn:ComputerhardwareandsoftwareDomain


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value20118015911596
Percentage of PropertyPlantAndEquipmentGross76.675.577.974.974.4
Percentage of Assets6.26.15.96.45.5
Percentage of Assets asgn:ComputerhardwareandsoftwareDomain0.00.00.00.00.0

asgn:WorkInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4.87.03.694.5655.5224.13912149.9374.751
Percentage of PropertyPlantAndEquipmentGross1.82.91.83.04.33.612.518.816.09.9
Percentage of Assets0.10.20.10.30.30.21.01.20.91.2
Percentage of Assets asgn:WorkInProgress0.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value282622171414118.4096.8915.776
Percentage of PropertyPlantAndEquipmentGross10.611.210.911.411.612.512.210.611.112.1
Percentage of Assets0.90.90.81.00.90.80.90.70.61.4
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2824191612107.0076.0595.4174.633
Percentage of PropertyPlantAndEquipmentGross11.010.39.410.89.89.27.17.68.79.7
Percentage of Assets0.90.80.70.90.70.60.50.50.51.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value121214121212121113131318187.6018.4338.2488.2998.4649.719.742101011116.9574.8696.0556.0186.1566.1725.8985.1995.2755.379113.32.20.6340.7130.70.60.4160.520.522
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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

us-gaap:AmortizationOfIntangibleAssets us-gaap:StatementBusinessSegments

asgn:ApexSegment


Amortization
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5.75.75.55.34.84.05.56.06.5476.5466.5466.5467.3787.1947.2627.5278.5898.598.598.599.7339.7325.3843.5224.0894.0894.0894.0894.8814.8814.8814.881
Percentage of AmortizationOfIntangibleAssets46.744.243.743.839.033.642.043.547.435.335.386.187.587.287.588.988.588.285.684.786.085.977.472.367.567.966.466.382.893.992.590.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets asgn:ApexSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

asgn:CommercialBusiness


Amortization
Period End2021-06-302020-06-30
Value5.65.4
Percentage of AmortizationOfIntangibleAssets46.742.9
Percentage of Assets0.00.0
Percentage of Assets asgn:CommercialBusiness0.00.0

asgn:ECS


Amortization
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.47.07.06.66.86.96.66.86.24211100.0
Percentage of AmortizationOfIntangibleAssets52.554.355.654.555.358.050.449.345.259.358.80.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets asgn:ECS0.00.00.00.00.00.00.00.00.00.00.00.0

asgn:FederalGovernmentBusiness


Amortization
Period End2021-06-302020-06-30
Value6.47.0
Percentage of AmortizationOfIntangibleAssets53.355.6
Percentage of Assets0.00.0
Percentage of Assets asgn:FederalGovernmentBusiness0.00.0

asgn:OxfordSegment


Amortization
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.10.20.10.20.71.01.01.01.0361.041.0481.0551.0551.0541.0370.9371.1211.1521.4421.5541.5831.5931.5731.31.3841.3751.3621.370.6660.0960.0960.107
Percentage of AmortizationOfIntangibleAssets0.81.60.81.75.78.47.67.27.55.65.713.912.512.812.511.111.511.814.415.314.014.122.626.722.922.822.122.211.31.81.82.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets asgn:OxfordSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value546869747980737275777981835757585959565756545351514446434240383330272625231918171715
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.62.02.12.32.62.72.52.62.72.72.93.13.13.13.23.23.43.43.23.33.23.13.02.92.93.73.73.43.33.23.13.02.82.52.42.32.24.54.44.34.64.6

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

asgn:SoftwareDevelopmentWorkInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4.86.43.13.23.12.59.010.07.53.9
Percentage of PropertyPlantAndEquipmentNet6.98.73.95.55.44.719.225.927.921.6
Percentage of Assets0.10.20.10.20.20.10.70.80.70.9
Percentage of Assets asgn:SoftwareDevelopmentWorkInProgress0.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareDevelopment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3434413331151413128.5
Percentage of PropertyPlantAndEquipmentNet49.347.252.257.455.829.529.935.045.047.1
Percentage of Assets1.01.21.51.81.80.91.11.11.12.1
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

asgn:Domestic


Property
Period End2020-12-312019-12-31
Value6771
Percentage of PropertyPlantAndEquipmentNet97.496.9
Percentage of Assets2.12.4
Percentage of Assets asgn:Domestic0.00.0

asgn:Foreign


Property
Period End2020-12-312019-12-31
Value1.82.3
Percentage of PropertyPlantAndEquipmentNet2.63.1
Percentage of Assets0.10.1
Percentage of Assets asgn:Foreign0.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-04-022018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1475161716181590154715471486144414451445142114201420526894894893875873873875874875874875878510570574574575574496495497498497474230229229216199
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.748.549.449.550.551.350.651.051.651.452.953.353.10.048.249.449.549.649.949.849.749.249.349.548.748.941.944.845.345.145.945.644.445.545.545.445.243.455.055.856.556.458.5

us-gaap:Goodwill us-gaap:StatementBusinessSegments

asgn:TheCreativeCircle


Goodwillus-gaap:
Period End2020-10-31
Value358
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets asgn:TheCreativeCircle0.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:Trademarks, asgn:TheCreativeCircle


Indefinite
Period End2020-10-31
Value66
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0
Percentage of Assets0.0
Percentage of Assets us-gaap:Trademarks asgn:TheCreativeCircle0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4754754874964744874764644764934885025213453523613613693773883974084174294402452622692762822882482532582632753012930313025
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.714.314.915.515.516.116.216.417.017.518.218.919.518.619.520.020.521.121.622.022.423.023.623.924.520.220.621.321.622.522.922.223.223.624.025.127.57.17.47.77.97.4

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value232216229237215228217206218231226240258991061151151231321421521621721831956777839096102768186911031295.158
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.76.57.07.47.07.67.47.37.88.28.49.09.75.35.96.46.67.17.58.18.69.19.710.210.95.56.16.67.17.78.16.87.57.98.49.411.81.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

asgn:ContractorRelations


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.10.10.20.20.40.40.50.50.62.14.0326.0198.0071011131416192124262932356.347.9369.5741011128.0268.6999.3821010111.677
Percentage of FiniteLivedIntangibleAssetsNet0.00.00.10.10.20.20.20.20.30.91.82.53.110.111.212.112.613.514.515.215.816.517.217.718.19.510.211.411.712.212.610.510.710.811.010.48.932.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.10.20.20.30.50.70.80.81.01.11.21.41.51.71.82.00.50.60.80.80.91.00.70.80.90.91.01.10.4
Percentage of Assets asgn:ContractorRelations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value22420721822620321320519120020820120721478838887929710310911512112913644525660646866707579901153.186
Percentage of FiniteLivedIntangibleAssetsNet96.595.895.495.094.293.694.292.991.790.288.986.582.779.578.076.776.074.873.772.972.271.570.770.369.966.367.366.867.066.966.987.387.287.186.987.689.461.8
Percentage of Assets6.56.26.77.06.67.17.06.87.17.47.57.88.04.34.64.95.05.35.65.96.26.56.97.27.63.74.14.44.75.15.45.96.56.97.38.310.60.8
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value7.68.59.6109.710111011121213144.8955.255.75.185.5585.9396.3656.8147.2637.7118.1618.6061.521.7641.9732.1442.2932.4391.6691.7231.7891.9242.0512.1830.295
Percentage of FiniteLivedIntangibleAssetsNet3.33.94.24.44.54.75.15.25.45.55.45.55.54.94.94.94.54.54.54.54.54.54.54.44.42.32.32.32.42.42.42.22.12.12.12.01.75.7
Percentage of Assets0.20.30.30.30.30.40.40.40.40.50.50.50.50.30.30.30.30.30.30.40.40.40.40.50.50.10.10.20.20.20.20.10.20.20.20.20.20.1
Percentage of Assets us-gaap:NoncompeteAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.40.60.81.22.43.51.12.74.35.85.368.7170.0
Percentage of FiniteLivedIntangibleAssetsNet0.20.30.30.51.11.50.51.32.02.52.43.66.70.0
Percentage of Assets0.00.00.00.00.10.10.00.10.20.20.20.30.70.0
Percentage of Assets us-gaap:OrderOrProductionBacklog0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value607684939095948587910.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.82.32.62.92.93.23.23.03.13.20.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value212223211918181616151213128.5635.7495.9677.1937.3246.9586.8246.7636.657.0727.5947.9617.3398.1858.1088.6519.0739.3268.0587.816141516151.9982.0544.2264.6634.762
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.70.70.70.60.60.60.60.60.60.50.50.50.50.30.30.40.40.40.40.40.40.40.40.40.60.60.60.70.70.70.70.71.31.41.51.40.50.51.01.21.4

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value33293950373339272427432826146.876.1646.3147.3426.2666.0215.5546.1649.1326.6867.966.1578.8767.1665.5455.6878.376.3885.5995.4536.815.3786.0525.7814.1129.097.855.392
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.91.21.61.21.11.31.00.91.01.61.11.00.80.40.30.40.40.40.30.30.30.50.40.40.50.70.60.40.50.70.60.50.50.60.50.61.41.02.22.01.6

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4984284163893573613403533263133082912791821661891781671621741771751601821711541651721701571691391271281181291256256646045
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.412.912.712.111.712.011.612.511.711.111.510.910.49.89.210.510.19.69.39.910.09.99.110.19.512.713.013.613.412.513.412.411.711.810.811.811.514.913.716.015.713.2

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value222829312727252525260.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.70.80.91.00.90.90.90.90.90.90.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1028680718584554449384941502929242320272530404739431721222323271616171516188.2576.5645.8814.6264.193
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.02.62.52.22.82.81.91.61.81.41.81.61.91.61.61.41.41.21.61.41.72.32.72.22.41.51.71.81.91.82.21.41.51.61.41.51.72.01.61.41.21.2

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value103310331033103310321065103298510261107110011541240565575609579617640658691723755784830411
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.931.031.532.233.735.335.134.836.739.440.943.346.430.531.833.832.835.236.537.438.940.742.743.746.232.3

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1033103210651032985102611071100115412405655756095796176406586917237557848303163963853583753893473593734164294527581837261
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.533.735.335.134.836.739.440.943.346.430.531.833.832.835.236.537.438.940.742.743.746.226.031.130.428.129.930.931.133.034.237.939.041.418.019.920.418.818.1

Deferred Tax Liabilities Noncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value10810810810798989878787979716869697474747461616161666563675449494922222223151515149.8969.96210
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.13.33.33.33.23.33.42.82.82.83.02.72.63.73.84.14.24.24.23.53.53.53.53.73.75.25.34.33.94.03.92.12.12.12.11.41.43.83.62.42.63.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2020-12-312019-12-31
Value10898
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0
Percentage of Assets3.33.4

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value546269875017171616151717179.8277.3725.8376.7576.7836.5926.455.6945.0335.1165.1245.0948.0729.416111111125.6355.7816.25.965.7245.1223.3624.5394.3723.7271.773
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.92.12.71.60.60.60.60.60.60.60.70.70.50.40.30.40.40.40.40.30.30.30.30.30.70.70.90.90.91.00.50.50.60.50.50.50.81.11.11.00.5

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value445562706975756667700.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.31.61.92.22.32.52.62.42.42.50.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value25
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.8

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value20
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value12
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value5400000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value2700000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value9210191939699
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets2.83.53.23.33.40.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value99
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets3.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value6900000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.2

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value17191645158715241457139913761331128312271182112910681030991924927886868861840811784758725674634643685660640603574561532516490256246238232219226218
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 Assets49.749.448.447.547.546.446.847.045.943.644.042.440.055.454.851.252.550.649.648.947.345.744.442.240.355.449.850.753.752.750.853.952.751.448.547.044.861.060.158.760.764.30.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-2.9-4.2-1.0-4.9-7.9-9.5-7.0-8.8-6.4-7.4-6.342-5.1-4.8-2.1-3.639-10.023-8.162-4.570.116-1.205-2.0380.0041.1260.8
Percentage of StockholdersEquity-0.2-0.3-0.1-0.3-0.5-0.7-0.5-0.7-0.5-0.6-0.5-0.5-0.4-0.2-0.4-1.2-1.0-0.70.0-0.2-0.80.00.50.4
Percentage of Assets-0.1-0.1-0.0-0.2-0.3-0.3-0.2-0.3-0.2-0.3-0.2-0.2-0.2-0.1-0.2-0.6-0.5-0.40.0-0.1-0.50.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value683674661657645638638634625613601594581574566562542483493471229224220227
Percentage of StockholdersEquity39.741.041.743.244.345.646.447.648.750.050.952.654.455.857.164.869.276.377.188.593.0102.197.1104.1
Percentage of Assets19.720.220.220.521.121.221.722.422.321.822.422.321.830.931.332.130.738.039.143.055.965.70.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.50.50.50.50.50.50.50.50.50.50.5250.50.50.50.5210.5270.530.5140.5390.530.370.3650.3630.388
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.20.20.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value10399759268708187697447056646215865404914574283152491541466119-5.0215.0916
Percentage of StockholdersEquity60.459.258.457.156.255.054.153.051.750.649.647.846.044.443.236.331.824.422.811.67.7-2.32.27.4
Percentage of Assets30.029.228.327.126.725.525.324.923.722.121.820.318.424.623.718.014.112.111.65.64.6-1.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0525000.0524000.0523000.0523000.0521000.0520000.0528000.0528000.0527000.0531000.0535000.0533000.0530000.0528000.0526000.0517000.0514000.0523000.0544000.0543000.0539000.0538000.0535000.0532000.0530000.0525000.0519000.0376000.0370000.0369000.0370000.0365000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.1

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value683674661657645638638634625613601594581574566567569564562561557550542533525490483489503499493489481477471467459232229227227224
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.720.220.220.521.121.221.722.422.321.822.422.321.830.931.331.532.232.232.131.931.431.030.729.729.240.338.038.639.539.839.143.744.343.743.042.542.055.355.956.059.365.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value103997592687081876974470566462158654049145742836136333031530629026624923120619215415618016014611393866150322419114.008-5.021
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.029.228.327.126.725.525.324.923.722.121.820.318.424.623.720.020.618.918.017.416.315.014.112.911.515.812.112.314.212.811.610.28.67.95.64.63.05.84.62.81.0-1.5

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:StatementGeographical

asgn:Foreign


Retained
Period End2020-12-31
Value29
Percentage of RetainedEarningsAccumulatedDeficit3.2
Percentage of Assets0.9
Percentage of Assets asgn:Foreign0.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-2900000.0-4200000.0-1000000.0-4900000.0-7900000.0-9500000.0-7000000.0-8800000.0-6400000.0-7400000.0-6342000.0-5067000.0-4799000.0-2164000.0-3639000.0-4395000.0-6178000.0-9321000.0-10023000.0-7482000.0-7902000.0-6819000.0-8162000.0-7054000.0-7344000.0-8247000.0-4570000.0-2902000.0-37000.0116000.0116000.0-385000.0-1918000.0-2397000.0-1205000.0-1986000.0-2669000.0-941000.0-2038000.0-906000.01111000.04000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.1-0.1-0.0-0.2-0.3-0.3-0.2-0.3-0.2-0.3-0.2-0.2-0.2-0.1-0.2-0.2-0.3-0.5-0.6-0.4-0.4-0.4-0.5-0.4-0.4-0.7-0.4-0.2-0.00.00.0-0.0-0.2-0.2-0.1-0.2-0.2-0.2-0.5-0.20.30.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10108.27.18.28.98.17.81310.08.8918.58.74.9
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10108.27.18.28.98.17.81310.08.8918.58.74.9
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value841198787186648191964463927654585439435542603730343219284229-4.3213643263.5752623-15.8656.9738.3652.1097.1675.7786.4595.929
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.711.78.68.719.96.57.99.19.94.86.910.28.78.08.68.26.17.09.06.89.96.45.26.16.74.65.99.06.3-1.08.610.16.40.96.56.1-5.64.25.21.35.04.55.35.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-94.0-9.4-38.9-71.7-7.4-101.0-77.7-6.1-8.3-57.0-6.207-7.296-769.012-6.218-6.251-30.51-6.581-6.775-6.646-7.079-7.153-1.106-6.015-4.246-558.165106-5.825-4.503-5.342-3.89-86.383-4.694-1.69724-2.455-5.3-353.14-2.071-2.66-16.959-2.316-19.185-2.306-6.227
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-9.6-0.9-3.8-7.1-0.8-10.2-7.6-0.6-0.9-6.2-0.7-0.8-87.5-0.9-0.9-4.6-1.0-1.1-1.1-1.1-1.2-0.2-1.0-0.7-115.024.9-1.2-0.9-1.1-0.9-20.4-1.1-0.46.3-0.6-1.4-124.7-1.2-1.6-10.4-1.6-14.8-1.9-5.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2.82.9-4.64.8-35.36.123-57.1-84.37.4-56.218-88.466660-7.667-43.652-15.525-39.077-40.215-38.86-53.656-46.815-31.653-28.808-43.775491-81.487-20.115-38.718-16.9-5.35942-8.269-22.843-43.42-10.164-22.816370-5.184-0.9249.315-2.39511-15.94-0.162
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.30.3-0.50.5-3.80.62.3-5.7-8.70.8-6.0-9.875.1-1.1-6.4-2.3-6.0-6.4-6.3-8.5-7.7-5.4-5.0-7.7101.3-18.9-4.2-8.1-3.6-1.29.9-1.9-5.5-11.2-2.5-5.9130.7-3.1-0.65.7-1.78.9-13.2-0.1

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-11.11124421143-31.227274.5-6.2
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1.110.94.42.215.4-3.12.72.70.5-0.7

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value212224222121222223232328281415141414161515151615118.665109.6269.5048.9598.2247.2247.197.244-9.3238.4965.4642.063
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4.2-10.0-12.5133.7-3.9103.1-3.7-17.31313-9.0675.8250.45-0.177-0.670.7121.289-0.345-0.89-2.292.74-0.898-0.3630.2050.1331.0460.134-3.006-1.1950.864-0.16-1.0891.1860.193-0.6981.306-4.7691.2390.6241.0940.1670.245
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value66-30.33122-71.030-6.0313.6-4.642151813-1.475162510-4.096129.19725-0.938309.817145.0283.2662016-13.8370.6637.21626-5.6288.75223-7.72951-13.189-6.116-7.5118-6.834
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value841198787186648191964463927654585439435542603730343219284229-4.3213643263.5752623-15.8656.9738.3652.1097.1675.7786.4595.929
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.711.78.68.719.96.57.99.19.94.86.910.28.78.08.68.26.17.09.06.89.96.45.26.16.74.65.99.06.3-1.08.610.16.40.96.56.1-5.64.25.21.35.04.55.35.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value64485552484339574334454933296734332224292617192414392022201332207.3392411178.5155.3837.5017.7675.8653.164-13.6983.1630.94
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.64.75.55.25.24.43.85.74.43.84.95.43.84.29.95.25.13.63.94.74.33.03.34.42.99.14.34.64.43.27.74.71.86.32.84.53.03.24.64.84.12.4-11.32.70.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6448555248433957433445493329
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.199.9100.1100.0
Percentage of Revenues6.64.75.55.25.24.43.85.74.43.84.95.43.84.2
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value10108.3999999999999977.08.28.78.27.8139.59.1088.6198.874.8916.1016.3825.9915.577.2216.3456.5346.9246.0545.2363.9544.3084.6064.0953.194.0014.23.4862.7243.1323.0752.3081.1911.8431.8381.6211.6252.4312.099
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-94.0-9.4-38.9-71.7-7.4-101.0-77.7-6.1-8.3-57.0-6.207-7.296-769.012-6.218-6.251-30.51-6.581-6.775-6.646-7.079-7.153-1.106-6.015-4.246-558.165106-5.825-4.503-5.342-3.89-86.383-4.694-1.69724-2.455-5.3-353.14-2.071-2.66-16.959-2.316-19.185-2.306-6.227
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-9.6-0.9-3.8-7.1-0.8-10.2-7.6-0.6-0.9-6.2-0.7-0.8-87.5-0.9-0.9-4.6-1.0-1.1-1.1-1.1-1.2-0.2-1.0-0.7-115.024.9-1.2-0.9-1.1-0.9-20.4-1.1-0.46.3-0.6-1.4-124.7-1.2-1.6-10.4-1.6-14.8-1.9-5.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.39.34.35.77.3159.96.98.47.56.6087.58.3956.1986.2274.836.4166.7926.5876.6426.6277.2826.5124.8465.3318.05.4694.6225.6184.024.2384.9654.5432.7853.4713.7125.0522.1192.3651.3742.0222.652.1081.358
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2.82.9-4.64.8-35.36.123-57.1-84.37.4-56.218-88.466660-7.667-43.652-15.525-39.077-40.215-38.86-53.656-46.815-31.653-28.808-43.775491-81.487-20.115-38.718-16.9-5.35942-8.269-22.843-43.42-10.164-22.816370-5.184-0.9249.315-2.39511-15.94-0.162
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.30.3-0.50.5-3.80.62.3-5.7-8.70.8-6.0-9.875.1-1.1-6.4-2.3-6.0-6.4-6.3-8.5-7.7-5.4-5.0-7.7101.3-18.9-4.2-8.1-3.6-1.29.9-1.9-5.5-11.2-2.5-5.9130.7-3.1-0.65.7-1.78.9-13.2-0.1

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value0.00.00.0655949.06.0440.00.08220.00.0350.02.04.00.07.00.00.00.08750.021430.099460.03830.00.0230.015
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.00.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.00.0100.0100.00.0100.00.00.00.0100.00.0100.0100.00.0100.0100.00.0100.00.00.0100.00.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.03332558518938558813310.0355.53826233439333046359809.56316171054.0113974312501036.251.254.251.2513790.0
Percentage of RepaymentsOfLongTermDebt0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-31
Value0.00.00.0270.0200.00.00.00.00.00.01.116460.01219182.7870.0-0.0010.0010.01.64531680.00.00.00.00.2052.0
Percentage of PaymentsForRepurchaseOfCommonStock0.00.00.0100.00.0100.00.00.00.00.00.00.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.00.00.00.00.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value10898796974614832125.585
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-31
Value1300000.01300000.0389000.0430000.01293000.0814000.01434000.01439000.0376000.0200000.0200000.0200000.0358000.0397000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value500000.0800000.0999000.01255000.01209000.01044000.01114000.01511000.0916000.0670000.0
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:IncreaseDecreaseInOperatingLeaseLiability

asgn:IncreaseDecreaseInOperatingLeaseLiability


Increase
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
Value-10200000.0-6200000.0-7200000.0-7400000.0-5400000.0-7600000.0-20500000.06800000.00000
Percentage of IncreaseDecreaseInOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

asgn:IncreaseDecreaseInOperatingRightofUseAsset

asgn:IncreaseDecreaseInOperatingRightofUseAsset


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-8.9-53.236-7.2-7.2-7.1-7.0-20.76.80.00.00.00.0
Percentage of IncreaseDecreaseInOperatingRightofUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

asgn:NetIncomeFromContinuingOperations

asgn:NetIncomeFromContinuingOperations


Net
Period End2021-06-302020-06-30
Value5743
Percentage of NetIncomeFromContinuingOperations100.0100.0

asgn:NetIncomeFromDiscontinuedOperations

asgn:NetIncomeFromDiscontinuedOperations


Net
Period End2021-06-302020-06-30
Value6.95.3
Percentage of NetIncomeFromDiscontinuedOperations100.0100.0

asgn:NetIncomeFromDiscontinuedOperations us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Net
Period End2021-06-302020-06-30
Value6.95.3
Percentage of NetIncomeFromDiscontinuedOperations100.0100.0

asgn:OperatingLeaseRightOfUseAssetsObtainedInExchangeForOperatingLeaseLiabilities

asgn:OperatingLeaseRightOfUseAssetsObtainedInExchangeForOperatingLeaseLiabilities


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.20.31.98.5
Percentage of OperatingLeaseRightOfUseAssetsObtainedInExchangeForOperatingLeaseLiabilities100.0100.0100.0100.0

asgn:ProceedsFromSaleOfPropertyHeldForSaleNetTax us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

asgn:ProceedsFromSaleOfPropertyHeldForSaleNetTax

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Proceeds
Period End2021-06-30
Value415
Percentage of ProceedsFromSaleOfPropertyHeldForSaleNetTax100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2021-06-302020-06-30
Value2300000.01000000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302020-06-30
Value2300000.01000000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1000000.0600000.03600000.01100000.00-100000.01200000.0790000.0-37000.0-272000.01985000.0250000.0-86000.0-183000.02332000.0-977000.0841000.0287000.0287000.0-256000.0-382000.0616000.01011000.01631000.0662000.0-231000.0870000.0-387000.0-12000.0174000.0819000.0-376000.0-289000.0416000.0618000.0-163000.0160000.0-164000.0491000.0-384000.0359000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302020-06-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value7.16.51.861.8171.581.4291.5941.6771.6861.5481.4781.501
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation us-gaap:StatementBusinessSegments

asgn:CommercialBusiness


Depreciationus-gaap:
Period End2021-06-302020-06-30
Value3.43.6
Percentage of Depreciation47.955.4

asgn:FederalGovernmentBusiness


Depreciationus-gaap:
Period End2021-06-302020-06-30
Value2.21.9
Percentage of Depreciation31.029.2

us-gaap:DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-06-30
Value9271
Percentage of DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-06-30
Value100000.0200000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-06-30
Value3226
Percentage of DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-06-30
Value4133
Percentage of DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-06-30
Value8.56.9
Percentage of DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-06-30
Value134104
Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue100.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents


Effect
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value800000.0-1200000.01100000.0500000.0-400000.0500000.0-700000.0600000.0-600000.0-527000.0-89000.0-1127000.0385000.0334000.0455000.0823000.0151000.0-324000.0223000.049000.0-55000.0-420000.0197000.0-541000.0-703000.0-291000.0-600000.0271000.0-386000.0-62000.0308000.0125000.0-279000.0167000.035000.0-299000.0228000.0-287000.0-403000.0906000.0-694000.0-82000.0255000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillAcquiredDuringPeriod us-gaap:BusinessAcquisition

us-gaap:GoodwillAcquiredDuringPeriod

asgn:LeapFrog


Goodwill
Period End2020-08-31
Value42
Percentage of GoodwillAcquiredDuringPeriod100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1100000.01500000.01200000.0300000.0-1000000.0800000.0-900000.0200000.0-400000.0-379000.0-199000.0-1441000.0793000.0345000.0852000.01559000.0359000.0-1502000.096000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

asgn:ApexSegment


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-100000.0300000.0100000.0-200000.0-300000.000000080000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss9.120.08.3-66.730.00.00.00.00.00.0-0.083.3

asgn:OxfordSegment


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1000000.01200000.01100000.0500000.0-700000.0800000.0-900000.0200000.0-400000.0-379000.0-199000.0-1441000.0793000.0345000.0852000.01559000.0359000.0-1502000.016000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss90.980.091.7166.770.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.016.7

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2021-06-302021-03-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value3300000.0200000.0-560000.0539000.000823000.0-9000.01982000.0-991000.000
Percentage of GoodwillPurchaseAccountingAdjustments100.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:StatementBusinessSegments

asgn:ECS


Goodwill
Period End2021-03-31
Value200000.0
Percentage of GoodwillPurchaseAccountingAdjustments100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare


Income
Period End2021-06-302020-06-30
Value0.130.1
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare


Income
Period End2021-06-302020-06-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.130.10000000000.5-0.0200-0.010.27000.260.040.010.030.01
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare100.0100.00.00.00.00.00.00.00.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value7.49.9-1.1-15.9115.7-17.75.5-2.312-4.7141.9365.361-0.448-12.8131.7470.45311-11.7244.0167.9873.067-3.5956.081-9.626-0.539-6.1162.5078.031-12.445-8.8884.343-3.6452.431-8.7864.5023.1461.334-2.8280.11.0870.410.1670.689
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedSalaries

us-gaap:IncreaseDecreaseInAccruedSalaries


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3119-15.328-9.29.1-20.1248.3-7.8-1.5154.72156.473-13.2517.9896.1580.144-1.796-4.6097.32122-25.20912103.16-3.5376.6877.5260.599-2.3737.4345.297.203-7.0694.351-27.6292.2940.850.4311.673.449-0.531.175
Percentage of IncreaseDecreaseInAccruedSalaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingLeaseLiability

us-gaap:IncreaseDecreaseInOperatingLeaseLiability


Increase
Period End2021-03-312020-03-31
Value-9500000.0-7400000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiability100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-5.79999999999999914-142.478-23.6-0.4-5.83.6-10.910-4.1394.148-0.4991.991.273-3.4346.056-0.818-5.5727.5843.697
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-30
Value-3.8-3.0-25.732-5.6-7.918-3.4-1.66.9-2.294-0.48-3.784-8.21810-1.3851.8860.4570.407-1.978-1.015-3.8470.582
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value700000.0700000.0100000.0500000.0500000.0500000.0-100000.0600000.0600000.0600000.020000.0672000.0705000.0653000.043000.0673000.0650000.0591000.049000.0493000.0489000.0497000.040000.0650000.0655000.0690000.08000.0755000.0801000.0871000.030000.01004000.0949000.0990000.057000.01031000.01027000.0885000.0-8000.0768000.0747000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1300000.0-3200000.03900000.03000000.01600000.0-2500000.01800000.0-2400000.01000000.0-1100000.0-1272000.0-268000.0-2635000.01475000.01783000.03143000.0702000.0420000.0-1083000.01343000.0290000.0828000.0-3724000.0-2884000.0-160000.0-44000.0480000.01504000.0403000.0-1259000.0748000.0776000.0-1767000.01097000.0-1192000.0-1908000.0818000.0620000.0-154000.0777000.0-995000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-3800000.01000000.0-11300000.08900000.0-1800000.0-1700000.0-2200000.0-1300000.0-4000000.0-1500000.01395000.0-4575000.0-7235000.0-1236000.0-643000.0-2176000.0-801000.0-2990000.0-1577000.0-2052000.0-307000.0-1706000.0-4419000.0-1782000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOtherTaxes

us-gaap:PaymentsForOtherTaxes


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2.34.81.11.04.94.50.91.35.51.2471.2031.1442.0557.1010.9221.0815.7821.0560.7021.6763.592.2231.0631.5463.9910.9770.9771.2673.2771.0270.9711.9913.6110.3150.2250.1461.9410.4650.130.0951.5241.1040.167
Percentage of PaymentsForOtherTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value100000.0500000.0-600000.0100000.0200000.0-100000.0-800000.0200000.0700000.0-364000.060000.0100000.020000.0-88000.0-148000.0165000.0-17000.059000.0437000.0526000.0-176000.0-480000.0-600000.0596000.0-12000.0356000.0-119000.0-54000.0-352000.0-578000.0-271000.0183000.01689000.0-1016000.01292000.0641000.0-48000.0295000.0-126000.0294000.0-572000.0240000.0-228000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-09-302019-09-302018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302012-09-302011-09-30
Value-0.10.0-0.001220.00.8320.0382.4030.8890.00.0-0.003230.4860.0010.00.446-0.0040.5310.0
Percentage of PaymentsOfDebtIssuanceCosts100.00.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value34660.085670.0-0.348-0.037-0.2647600.00.112250.00.0-0.0170.00.0480.0-0.270.2221100.00.00.00.00.2963470.00.0150.0170.05.097
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.00.0100.00.0100.0100.0100.00.00.00.00.0100.0100.00.00.0100.00.0100.00.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired us-gaap:BusinessAcquisition

asgn:LeapFrog


Payments
Period End2020-08-31
Value66
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0

us-gaap:ProceedsFromIssuanceOrSaleOfEquity

us-gaap:ProceedsFromIssuanceOrSaleOfEquity


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.07.70.45.80.05.90.05.80.06.90.034.9230.0314.3880.0653.5420.0424.1060.33.5371.8984.0230.1932.5960.2473.5550.2152.8750.3012.9670.3312.8111.4692.4431.9453.8610.3952.1830.5210.7250.6430.8120.1590.018
Percentage of ProceedsFromIssuanceOrSaleOfEquity0.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyHeldForSale us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ProceedsFromSaleOfPropertyHeldForSale

us-gaap:SegmentDiscontinuedOperations, asgn:OxfordBusiness


Proceeds
Period End2021-06-30
Value525
Percentage of ProceedsFromSaleOfPropertyHeldForSale100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-03-31
Value100000.0
Percentage of ProceedsFromStockOptionsExercised100.0

us-gaap:ProceedsFromStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Proceeds
Period End2021-03-31
Value100000.0
Percentage of ProceedsFromStockOptionsExercised100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value8.48.80.49.82.08.4175.4
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value100000.0200000.0-100000.0300000.0100000.0200000.00100000.00100000.0-39593.0100000.00100000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.0100000.00100000.0100000.0100000.0100000.00200000.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.00.0100.0100.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.17.60.05.20.05.90.05.70.06.90.0254.50.04.3
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.17.60.05.20.05.90.05.70.06.90.0234.50.04.3
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.00.0100.00.0100.00.0100.092.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-4800000.0-5000000.0-1100000.0-1000000.0-4900000.0-4500000.0-800000.0-1300000.0-5500000.0-1295000.0-1200000.0-1200000.0-1000000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-4800000.0-5000000.0-1100000.0-1000000.0-4900000.0-4500000.0-800000.0-1300000.0-5500000.0-1297000.0-1200000.0-1200000.0-1000000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.2100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-31
Value0.40.60.00.10.0470.40.00.1
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.00.0100.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-31
Value0.40.60.00.10.0470.40.00.1
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.00.0100.0100.0100.00.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value000800000.00300000.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares0.00.00.0100.00.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.027-27.0270.0200.07470.01020193.62.2190.00.01.63168
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.00.00.09.20.03.90.029100.02.45.4855.41.0-1.5730.00.00.4-52.59421
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.00.0-0.033.00.019.541.422.50.023.826.828.427.8-70.90.00.025.0-165.131.4

us-gaap:RetainedEarnings


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.00.00.0180.0160.029370.07.714132.6-3.8450.00.01.2-115.62146
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.00.0-0.067.00.080.541.477.50.076.273.171.672.2-173.30.00.075.0-363.068.6

asgn:DeferredPayrollTaxesCARESActCurrentPortion

asgn:DeferredPayrollTaxesCARESActCurrentPortion


Deferred
Period End2020-12-31
Value42
Percentage of DeferredPayrollTaxesCARESActCurrentPortion100.0

asgn:DeferredPayrollTaxesCARESActTotalAmount

asgn:DeferredPayrollTaxesCARESActTotalAmount


Deferred
Period End2020-12-31
Value85
Percentage of DeferredPayrollTaxesCARESActTotalAmount100.0

asgn:DeferredTaxAssetsLeasingliabilities

asgn:DeferredTaxAssetsLeasingliabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value23250.0
Percentage of DeferredTaxAssetsLeasingliabilities100.0100.00.0

asgn:DeferredTaxAssetsOperatingLossCarryforwardsNoncurrentForeign

asgn:DeferredTaxAssetsOperatingLossCarryforwardsNoncurrentForeign


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value800000.0800000.0999000.01255000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsNoncurrentForeign100.0100.0100.0100.0

asgn:DeferredTaxAssetsOtherNoncurrent

asgn:DeferredTaxAssetsOtherNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3000000.03400000.05270000.04339000.05482000.05061000.01554000.01822000.01975000.0758000.0
Percentage of DeferredTaxAssetsOtherNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

asgn:DeferredTaxLiabilitiesNetOfDeferredTaxAssetsAndValuationAllowance

asgn:DeferredTaxLiabilitiesNetOfDeferredTaxAssetsAndValuationAllowance


Deferred
Period End2020-12-312019-12-31
Value10898
Percentage of DeferredTaxLiabilitiesNetOfDeferredTaxAssetsAndValuationAllowance100.0100.0

asgn:DeferredTaxLiabilityLeasingAsset

asgn:DeferredTaxLiabilityLeasingAsset


Deferred
Period End2020-12-312019-12-312018-12-31
Value22240.0
Percentage of DeferredTaxLiabilityLeasingAsset100.0100.00.0

asgn:DisposalGroupLeaseLiabilityCurrent us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

asgn:DisposalGroupLeaseLiabilityCurrent

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value4200000.05100000.0
Percentage of DisposalGroupLeaseLiabilityCurrent100.0100.0

asgn:DisposalGroupLeaseLiabilityNoncurrent us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

asgn:DisposalGroupLeaseLiabilityNoncurrent

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value5700000.07500000.0
Percentage of DisposalGroupLeaseLiabilityNoncurrent100.0100.0

asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest

asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest


Share
Period End2020-12-31
Value1100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest100.0

asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest us-gaap:AwardType

asgn:Awardswithperformanceandserviceconditions


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value600000.0700000.0859010.0615460.0865620.0826620.0355780.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest54.50.00.00.00.00.00.0

asgn:Awardwithserviceconditions


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value500000.0400000.0361250.0191200.0259410.0437700.0609660.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedAndExpectedToVest45.50.00.00.00.00.00.0

asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnvestedAndExpectedToVestWeightedAverageGrantDateFairValue us-gaap:AwardType

asgn:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnvestedAndExpectedToVestWeightedAverageGrantDateFairValue

asgn:RestrictedStockUnitsAndAwards


Share
Period End2020-12-31
Value63.51
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnvestedAndExpectedToVestWeightedAverageGrantDateFairValue100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-07-312021-04-302021-02-192020-11-02
Value52535352
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2020-12-312020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4700000.05700000.05600000.05100000.04700000.04600000.04840000.05120000.04880000.04932000.09909000.09504000.08809000.08280000.08093000.08035000.07758000.07284000.06682000.05908000.05186000.04476000.05220000.04741000.04374000.04557000.03067000.03209000.02979000.03165000.03970000.04439000.04602000.03190000.02777000.02676000.02398000.02175000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Assets
Period End2021-06-302020-12-31
Value341321
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent


Assets
Period End2021-06-302020-12-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value341770.00.00.00.034
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.00.00.00.00.0100.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount


Business
Period End2021-06-302019-10-17
Value5138
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount100.0100.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition

asgn:A2020Acquisitions


Business
Period End2020-12-31
Value77
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount0.0

asgn:A2021Acquisitions


Business
Period End2021-06-302020-12-31
Value4777
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount92.00.0

asgn:AccumulatedAcquisitionSince2019


Business
Period End2021-06-30
Value124
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount242.3

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments

asgn:A2021Acquisitions, asgn:CommercialBusiness


Business
Period End2021-06-30
Value51
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent us-gaap:Range

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent

srt:Maximum


Business
Period End2020-12-31
Value19
Percentage of BusinessCombinationContingentConsiderationLiabilityNoncurrent100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets

asgn:LeapFrog


Business
Period End2020-08-31
Value35
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-03-312020-12-312020-03-312019-12-31
Value1418188.4
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value10401040104010401000110010001124
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value131210111110106.2
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrent

us-gaap:DeferredCompensationLiabilityCurrent


Deferred
Period End2021-03-312020-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value14140.025.155.155.1510.09.2598.4241.2651.8961.82.1332.198
Percentage of DeferredCompensationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent


Deferred
Period End2020-12-312019-12-31
Value1411
Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent100.0100.0

us-gaap:DeferredCompensationPlanAssets us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DeferredCompensationPlanAssets

us-gaap:FairValueInputsLevel1


Deferred
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value14111110106.2
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value141413121011
Percentage of DeferredCompensationPlanAssets0.0100.00.00.00.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value188156111861078976583019
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenue

us-gaap:DeferredRevenue


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6.812148.46.48.93.89.756.839.080.56
Percentage of DeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value80583218342928271714
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign


Deferred
Period End2020-12-31
Value1700000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation


Deferred
Period End2020-12-312019-12-31
Value1412
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value8400000.09200000.09506000.04766000.09300000.07354000.03022000.03761000.02852000.03428000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1400000.01800000.01600000.02615000.03185000.02607000.02027000.01578000.01150000.01007000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther


Deferred
Period End2020-12-31
Value22
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312019-12-31
Value146112
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1413149.8511414136.1474.4493.867
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value9675
Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value1800000.01500000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value3927
Percentage of DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent

us-gaap:DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent


Disposal
Period End2020-12-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2440.00.00.00.073
Percentage of DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent100.00.00.00.00.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationCapitalLeasedAssets us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationCapitalLeasedAssets

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value9.511
Percentage of DisposalGroupIncludingDiscontinuedOperationCapitalLeasedAssets100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationGoodwill1 us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationGoodwill1

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value197197
Percentage of DisposalGroupIncludingDiscontinuedOperationGoodwill1100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationIntangibleAssets us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationIntangibleAssets

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value1718
Percentage of DisposalGroupIncludingDiscontinuedOperationIntangibleAssets100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherAssets us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherAssets

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value3000000.02400000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherAssets100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value1000000.0700000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value7300000.05600000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherLiabilities us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherLiabilities

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value3800000.04000000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherLiabilities100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities


Disposal
Period End2020-12-31
Value11
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value4000000.0800000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Disposal
Period End2021-06-302020-12-31
Value1314
Percentage of DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value278284266236206215203220196188194195179120114127118111111113118110881131028487908477767567625963592724242315
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

asgn:RestrictedStockUnitsAndAwards


Employee
Period End2020-12-312014-12-312013-12-312012-12-31
Value37141512
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0

us-gaap:EstimatedInsuranceRecoveries

us-gaap:EstimatedInsuranceRecoveries


Estimated
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1013141415151415151214141314141213
Percentage of EstimatedInsuranceRecoveries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue


Fair
Period End2020-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6.00.05.843212018203.03.03.03.03.03.667
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:BusinessAcquisition

asgn:LeapFrog


Fair
Period End2020-08-31
Value6.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue0.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value32635234034533131930729428226925624322420619819018117216415414413412411310295989286807368625752403634
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

asgn:ContractorRelations


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4571717070707070706967656361595755525048454240373432353333313029292827272625
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization13.920.120.820.521.322.123.023.924.925.626.126.828.129.729.830.130.430.630.731.131.531.932.232.833.734.535.736.938.339.841.543.946.549.553.267.171.275.1

us-gaap:ComputerSoftwareIntangibleAsset


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1818181818171615151413121211109.6668.8798.0917.3046.5165.7294.9414.1543.3662.581.8391.0510.263
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization5.55.75.96.26.26.26.26.26.26.46.66.56.36.26.05.95.75.65.45.25.04.84.43.42.82.11.30.4

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2322332222112001891791701621531451351291231191141081039892868074676056575349454136322723129.8447.891
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization71.266.265.461.260.459.558.657.957.457.056.655.857.760.060.160.060.060.060.160.059.959.959.959.759.258.958.758.357.656.956.254.251.548.444.730.626.723.1

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value191918171514131211109.9078.957.9727.0136.66.1455.7125.3084.9224.5194.0673.6263.1632.7552.3052.0622.01.8551.7161.571.4241.3261.2551.1831.0620.9240.7820.604
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization6.05.55.34.94.84.64.54.34.24.03.93.73.53.43.33.23.13.13.02.92.82.72.52.42.32.22.02.02.02.01.91.92.02.12.02.32.11.8

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2828282725242322201917178.70.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization8.98.18.47.97.87.87.87.67.37.16.97.23.90.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-312020-09-30
Value6079
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths


Finite
Period End2021-06-302021-03-31
Value2735
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-312020-09-30
Value4713
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive


Finite
Period End2021-06-302021-03-31
Value6960
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive


Finite
Period End2021-06-302021-03-31
Value2421
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour


Finite
Period End2021-06-302021-03-31
Value2926
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree


Finite
Period End2021-06-302021-03-31
Value3733
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo


Finite
Period End2021-06-302021-03-31
Value4339
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-312020-09-30
Value2126
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-312020-09-30
Value2633
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-312020-09-30
Value3338
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-312020-09-30
Value3946
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value55956956958354754752450050050148348348330530530529729629629729729729629729716217517617617617614414414414414416639
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:BusinessAcquisition

asgn:A2020Acquisitions


Finite
Period End2020-12-31
Value62
Percentage of FiniteLivedIntangibleAssetsGross11.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

asgn:ContractorRelations


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value717171717171717171717171717169696969696969696939424343434337373737373727
Percentage of FiniteLivedIntangibleAssetsGross12.512.213.013.013.614.214.214.214.714.714.723.323.323.323.523.523.523.523.523.523.523.423.424.224.424.724.724.724.726.326.326.326.326.322.869.5

us-gaap:CustomerRelationships


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value44143740340338436236236234634334320220220219619619619619619619619719710010910910911011010310310310310312511
Percentage of FiniteLivedIntangibleAssetsGross77.575.073.773.773.472.372.372.371.771.171.166.366.366.366.266.266.266.266.266.266.266.266.262.062.562.462.462.462.471.771.771.771.771.775.528.2

us-gaap:NoncompeteAgreements


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value27272525242323232222221111111010101010101010103.5823.7643.8283.863.8633.8632.9952.9782.9722.9862.9752.9650.899
Percentage of FiniteLivedIntangibleAssetsGross4.94.74.74.74.74.74.74.74.64.64.63.93.93.93.73.73.73.73.73.73.73.73.72.22.12.22.22.22.22.12.12.12.12.11.82.3

us-gaap:OrderOrProductionBacklog


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value29282828252525252326260.0
Percentage of FiniteLivedIntangibleAssetsGross5.14.95.25.24.85.05.05.04.85.45.40.0

us-gaap:GoodwillGross

us-gaap:GoodwillGross


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value1475161716181590154715471486144414451445142114201420894894893875873873875874875-874.906875878510570574574575574496495497620618596350321
Percentage of GoodwillGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillGross us-gaap:StatementBusinessSegments

asgn:ApexSegment


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value743-743.7745703703-703.5662662662-662.084662662662-662.084662644644-644.617644644644-644.6176456482862872882892892642642642662662662440.00.0
Percentage of GoodwillGross46.0-46.046.945.445.5-47.345.845.845.8-46.646.646.674.0-74.174.173.673.8-73.873.773.773.773.773.773.856.250.550.350.450.446.053.353.453.643.043.141.10.00.0

asgn:CommercialBusiness


Goodwill
Period End2021-06-302020-12-312019-12-31
Value829778738
Percentage of GoodwillGross56.248.149.7

asgn:ECS


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value6426426146146145525525525535280.0
Percentage of GoodwillGross39.739.738.639.739.737.238.338.238.337.20.0

asgn:FederalGovernmentBusiness


Goodwill
Period End2021-06-302020-12-312019-12-31
Value645642552
Percentage of GoodwillGross43.839.737.2

asgn:OxfordSegment


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value231-232.6231230229-230.5229230230-230.785231231232-232.011231230229-228.896230230230-230.289230230219220222221221220149149149149149149149149
Percentage of GoodwillGross14.3-14.414.514.914.9-15.515.916.015.9-16.216.316.326.0-25.925.926.426.2-26.226.326.326.326.326.326.243.138.638.738.638.638.430.130.230.024.124.225.142.646.5

us-gaap:IndefiniteLivedTrademarks

us-gaap:IndefiniteLivedTrademarks


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value24225825825825825825825825826226226226224524524524524524524524524524524524517818418518618618617117117117117117125
Percentage of IndefiniteLivedTrademarks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value802828828841806806783759759763745745745551551551543542542542542543542543543340341
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value32
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4000000.03900000.03900000.03900000.03900000.03900000.04400000.04390000.04390000.04400000.04000000.03500000.03500000.03500000.03500000.03700000.03700000.03200000.03200000.02900000.02900000.03000000.02700000.02500000.02500000.03000000.02800000.02600000.02600000.02400000.0
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:DiscontinuedOperationsHeldforsale, asgn:OxfordBusiness


Liabilities
Period End2021-06-302020-12-31
Value6251
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation100.0100.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent


Liabilities
Period End2021-06-302020-12-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value62390.00.00.00.020
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.00.00.00.00.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

asgn:A250MillionRevolvingCreditFacilityDueNovember2024


Line
Period End2020-09-30
Value250
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


Long
Period End2021-06-302021-03-312020-12-31
Value100010001100
Percentage of LongTermDebtFairValue100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value3.914.26
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OtherFiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OtherFiniteLivedIntangibleAssetsGross

asgn:ContractorRelations


Other
Period End2021-06-302021-03-312020-12-31
Value457171
Percentage of OtherFiniteLivedIntangibleAssetsGross100.0100.0100.0

us-gaap:CustomerRelationships


Other
Period End2021-06-302021-03-312020-12-31
Value457440441
Percentage of OtherFiniteLivedIntangibleAssetsGross1005.3620.1619.8

us-gaap:NoncompeteAgreements


Other
Period End2021-06-302021-03-312020-12-31
Value272727
Percentage of OtherFiniteLivedIntangibleAssetsGross59.839.139.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1220231015212910151611131510187.6448.7616.8176.3315.8967.8228.849126.5266.554.712145.6646.0916.3838.6867.4547.4696.7448.8393.764.4783.2123.7182.1843.6833.555
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value193165125967261514035
Percentage of PropertyPlantAndEquipmentOtherAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PurchaseObligation

us-gaap:PurchaseObligation


Purchase
Period End2020-12-31
Value37
Percentage of PurchaseObligation100.0

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInNextTwelveMonths


Purchase
Period End2020-12-31
Value16
Percentage of PurchaseObligationDueInNextTwelveMonths100.0

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInSecondYear


Purchase
Period End2020-12-31
Value14
Percentage of PurchaseObligationDueInSecondYear100.0

us-gaap:PurchaseObligationDueInThirdYear

us-gaap:PurchaseObligationDueInThirdYear


Purchase
Period End2020-12-31
Value7600000.0
Percentage of PurchaseObligationDueInThirdYear100.0

us-gaap:SelfInsuranceReserve

us-gaap:SelfInsuranceReserve


Self
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2.32.42.12.42.251.92.12.12.22.11.91.81.81.51.61.81.91.61.9101112111111111010101010
Percentage of SelfInsuranceReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeniorNotes

us-gaap:SeniorNotes


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-11-222018-12-31
Value5505505505505505505505500.0
Percentage of SeniorNotes100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

asgn:Awardswithperformanceandserviceconditions


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value600000.0700000.0893270.0652200.0916590.0881250.0381190.0394870.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0100.0

asgn:Awardwithserviceconditions


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value600000.0500000.0424680.0207770.0279260.0465370.0705370.0972360.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.071.447.531.930.552.8185.0246.2

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

asgn:RestrictedStockUnitsAndAwards


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value63.6663.2160.8744.2938.7836.3124.8818.914.318.99
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value100000.0100000.0148430.0191390.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType

asgn:RestrictedStockUnitsAndAwards


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value2600000.02900000.0927570.02130300.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant2600.02900.0624.91113.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:PlanName

asgn:EmployeeStockPurchasePlan


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value1300000.01700000.01925400.02085900.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant1300.01700.01297.21089.8

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnamortizedDebtIssuanceExpense


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value7.17.17.47.67.98.38.51921222324261212131414151617-17.781-18.492-19.203-19.915-3.3
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

asgn:AllowanceforWorkersCompensationLossReserves


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value13161714151515
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-312019-12-312018-12-312018-01-012017-12-312016-12-312015-12-31
Value4.75.14.8368.59.9098.0936.682
Percentage of ValuationAllowancesAndReservesBalance35.331.527.80.067.151.344.5

Line plots across dimensions of each concept


Gross Margin
us-gaap:StatementBusinessSegments
(None,)
Gross  Marginus-gaap: Statement Business Segments
Operating Margin
us-gaap:StatementBusinessSegments
(None,)
Operating  Marginus-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:GrossProfit
us-gaap:StatementBusinessSegments
(None,)
Gross Profitus-gaap: Statement Business Segments
us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments
(None,)
Operating Income Lossus-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:StatementBusinessSegments
(None,)
Revenuesus-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:MajorCustomers
(None,)
Revenuesus-gaap: Major Customers
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-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:AmortizationOfIntangibleAssets
us-gaap:StatementBusinessSegments
(None,)
Amortization Of Intangible Assetsus-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Netus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components