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Summary of Significant Accounting Policies (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
CountryandTerritory
Office
Dec. 31, 2013
Dec. 31, 2012
Basis of consolidation [Abstract]      
Ownership interest to qualify for equity method, maximum (in hundredths) 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage    
Ownership interest to qualify for equity method, minimum (in hundredths) 20.00%man_EquityMethodInvestmentOwnershipPercentageMinimum    
Carrying value of equity method investments $ 132.3us-gaap_EquityMethodInvestments $ 140.2us-gaap_EquityMethodInvestments $ 85.3us-gaap_EquityMethodInvestments
Unremitted earnings from equity method investments 77.4us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions 74.4us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions  
Revenues and receivables [Abstract]      
Franchise fees 25.4us-gaap_FranchiseRevenue 24.4us-gaap_FranchiseRevenue 23.9us-gaap_FranchiseRevenue
Deferred revenue - current 35.5us-gaap_DeferredRevenueCurrent 48.5us-gaap_DeferredRevenueCurrent  
Deferred revenue - non-current 0us-gaap_DeferredRevenueNoncurrent 10.0us-gaap_DeferredRevenueNoncurrent  
Allowance for doubtful accounts [Abstract]      
Bad debt expense 18.9us-gaap_ProvisionForDoubtfulAccounts 24.1us-gaap_ProvisionForDoubtfulAccounts 29.2us-gaap_ProvisionForDoubtfulAccounts
Advertising costs [Abstract]      
Advertising expenses 25.7us-gaap_AdvertisingExpense 22.3us-gaap_AdvertisingExpense 27.2us-gaap_AdvertisingExpense
Goodwill [Abstract]      
Goodwill, Gross 1,075.2man_GrossGoodwill [1] 1,090.9man_GrossGoodwill [1]  
Accumulated Amortization 0man_GoodwillAccumulatedAmortization [1] 0man_GoodwillAccumulatedAmortization [1]  
Goodwill, Net 1,075.2us-gaap_Goodwill [1],[2] 1,090.9us-gaap_Goodwill [1],[2] 1,041.3us-gaap_Goodwill [2]
Nature of operations [Abstract]      
Number of offices worldwide 3,000man_NumberOfOfficesInWhichEntityOperates    
Number of countries and territories 80man_NumberOfCountriesAndTerritoriesInWhichEntityOperates    
Accumulated goodwill impairment loss 513.4us-gaap_GoodwillImpairedAccumulatedImpairmentLoss 513.4us-gaap_GoodwillImpairedAccumulatedImpairmentLoss 513.4us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Income approach weight for goodwill impairment for certain reporting units (in hundredths) 75.00%man_IncomeApproachWeightForGoodwillImpairmentForCertainReportingUnits    
Market approach weight for goodwill impairment for certain reporting units (in hundredths) 25.00%man_MarketApproachWeightForGoodwillImpairmentForCertainReportingUnits    
Finite-lived [Abstract]      
Finite-Lived Intangible Assets, Gross 411.7us-gaap_FiniteLivedIntangibleAssetsGross 405.3us-gaap_FiniteLivedIntangibleAssetsGross  
Finite-Lived Intangible Assets, Accumulated Amortization 276.2us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization 247.9us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization  
Finite-Lived Intangible Assets, Net 135.5us-gaap_FiniteLivedIntangibleAssetsNet 157.4us-gaap_FiniteLivedIntangibleAssetsNet  
Indefinite-lived [Abstract]      
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross 151.3man_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross 151.7man_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross  
Indefinite-Lived intangible assets, Accumulated Amortization 0man_AccumulatedAmortizationOnInfiniteIntangibleAssets 0man_AccumulatedAmortizationOnInfiniteIntangibleAssets  
Indefinite-Lived Intangible Assets (Excluding Goodwill) 151.3us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill 151.7us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill  
Intangible Assets (Excluding Goodwill) [Abstract]      
Intangible Assets, Gross (Excluding Goodwill), Total 563.0us-gaap_IntangibleAssetsGrossExcludingGoodwill 557.0us-gaap_IntangibleAssetsGrossExcludingGoodwill  
Intangible Assets, Accumulated Amortization (Excluding Goodwill), Total 276.2man_IntangibleAssetsAccumulatedAmortizationExcludingGoodwillTotal 247.9man_IntangibleAssetsAccumulatedAmortizationExcludingGoodwillTotal  
Intangible Assets, Net (Excluding Goodwill) 286.8us-gaap_IntangibleAssetsNetExcludingGoodwill 309.1us-gaap_IntangibleAssetsNetExcludingGoodwill  
Amortization expense related to intangibles 33.4us-gaap_AmortizationOfIntangibleAssets [3] 34.1us-gaap_AmortizationOfIntangibleAssets [3] 36.7us-gaap_AmortizationOfIntangibleAssets [3]
Future amortization expense [Abstract]      
2015 29.5us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
2016 26.3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
2017 23.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
2018 20.2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
2019 15.9us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Marketable securities [Abstract]      
Available-for-sale investments market value 0us-gaap_AvailableForSaleSecurities 0us-gaap_AvailableForSaleSecurities  
Ownership interest in our Swiss franchise (in hundredths) 49.00%us-gaap_MinorityInterestOwnershipPercentageByParent    
Swiss Franchise Investment Market Value 200.9man_SwissFranchiseInvestmentMarketValue 204.2man_SwissFranchiseInvestmentMarketValue  
Swiss franchise realized gains 2.5us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 3.6us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 0.1us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Swiss franchise realized losses 0.5us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses 1.4us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses 0.2us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Capitalized software for internal use [Abstract]      
Capitalized Software, Useful Life, Minimum 3 years    
Capitalized Software, Useful Life, Maximum 10 years    
Net capitalized software 5.3us-gaap_CapitalizedComputerSoftwareNet 4.6us-gaap_CapitalizedComputerSoftwareNet  
Amortization expense related to the capitalized software costs 2.2us-gaap_CapitalizedComputerSoftwareAmortization 5.6us-gaap_CapitalizedComputerSoftwareAmortization 7.3us-gaap_CapitalizedComputerSoftwareAmortization
Property and equipment [Abstract]      
Property and equipment, gross 633.5us-gaap_PropertyPlantAndEquipmentGross 706.2us-gaap_PropertyPlantAndEquipmentGross  
Shareholders' Equity [Abstract]      
Shares authorized to be repurchased (in shares) 8.0us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased    
Remaining number of shares authorized to be repurchased (in shares) 6.0us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased    
Shares repurchased (in shares) 2.0us-gaap_TreasuryStockSharesAcquired 0us-gaap_TreasuryStockSharesAcquired 3.6us-gaap_TreasuryStockSharesAcquired
Total cost of shares repurchased 143.5us-gaap_TreasuryStockValueAcquiredParValueMethod 0us-gaap_TreasuryStockValueAcquiredParValueMethod 138.2us-gaap_TreasuryStockValueAcquiredParValueMethod
Dividends declared (in dollars per share) $ 0.98us-gaap_CommonStockDividendsPerShareDeclared $ 0.92us-gaap_CommonStockDividendsPerShareDeclared $ 0.86us-gaap_CommonStockDividendsPerShareDeclared
Total dividend paid 77.3us-gaap_PaymentsOfDividendsCommonStock 72.0us-gaap_PaymentsOfDividendsCommonStock 67.8us-gaap_PaymentsOfDividendsCommonStock
Payroll Tax Credit [Abstract]      
Multiplier for payroll tax credits 2.5man_MultiplierForPayrollTaxCredits    
Percentage of eligible wages for tax credit (in hundredths) 6.00%man_CICEPayrollTaxCredit 4.00%man_CICEPayrollTaxCredit  
Payment period of the CICE payroll tax credit 3 years    
Net proceeds from sale of tax credits   104.0us-gaap_ProceedsFromSaleOfOtherReceivables  
Land [Member]      
Property and equipment [Abstract]      
Property and equipment, gross 5.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember		 6.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember		  
Buildings [Member]      
Property and equipment [Abstract]      
Property and equipment, gross 19.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember		 20.8us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember		  
Furniture, Fixtures and Autos [Member]      
Property and equipment [Abstract]      
Property and equipment, gross 178.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= man_FurnitureFixturesAndAutosMember		 194.1us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= man_FurnitureFixturesAndAutosMember		  
Computer Equipment [Member]      
Property and equipment [Abstract]      
Property and equipment, gross 153.0us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		 168.1us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		  
Leasehold Improvements [Member]      
Property and equipment [Abstract]      
Property and equipment, gross 277.4us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember		 317.0us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember		  
Trade Names [Member]      
Indefinite-lived [Abstract]      
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross 54.0man_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 [4] 54.0man_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 [4]  
Indefinite-Lived intangible assets, Accumulated Amortization 0man_AccumulatedAmortizationOnInfiniteIntangibleAssets
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 [4] 0man_AccumulatedAmortizationOnInfiniteIntangibleAssets
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 [4]  
Indefinite-Lived Intangible Assets (Excluding Goodwill) 54.0us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 [4] 54.0us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 [4]  
Accumulated Impairment Loss 139.5man_IndefiniteLivedIntangibleAssetsExcludingGoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		 139.5man_IndefiniteLivedIntangibleAssetsExcludingGoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember		  
Reacquired Franchise Rights [Member]      
Indefinite-lived [Abstract]      
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross 97.3man_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= man_ReacquiredFranchiseRightsMember		 97.7man_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= man_ReacquiredFranchiseRightsMember		  
Indefinite-Lived intangible assets, Accumulated Amortization 0man_AccumulatedAmortizationOnInfiniteIntangibleAssets
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= man_ReacquiredFranchiseRightsMember		 0man_AccumulatedAmortizationOnInfiniteIntangibleAssets
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= man_ReacquiredFranchiseRightsMember		  
Indefinite-Lived Intangible Assets (Excluding Goodwill) 97.3us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= man_ReacquiredFranchiseRightsMember		 97.7us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= man_ReacquiredFranchiseRightsMember		  
Technology [Member]      
Finite-lived [Abstract]      
Finite-Lived Intangible Assets, Gross 19.6us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember		 19.6us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember		  
Finite-Lived Intangible Assets, Accumulated Amortization 19.6us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember		 19.6us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember		  
Finite-Lived Intangible Assets, Net 0us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember		 0us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember		  
Weighted-average useful lives (in years) 5 years    
Franchise Agreements [Member]      
Finite-lived [Abstract]      
Finite-Lived Intangible Assets, Gross 18.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember		 18.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember		  
Finite-Lived Intangible Assets, Accumulated Amortization 18.0us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember		 17.9us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember		  
Finite-Lived Intangible Assets, Net 0us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember		 0.1us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember		  
Weighted-average useful lives (in years) 10 years    
Customer Relationships [Member]      
Finite-lived [Abstract]      
Finite-Lived Intangible Assets, Gross 359.9us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 351.5us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		  
Finite-Lived Intangible Assets, Accumulated Amortization 225.6us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 196.4us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		  
Finite-Lived Intangible Assets, Net 134.3us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 155.1us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		  
Weighted-average useful lives (in years) 14 years    
Other [Member]      
Finite-lived [Abstract]      
Finite-Lived Intangible Assets, Gross 14.2us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember		 16.2us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember		  
Finite-Lived Intangible Assets, Accumulated Amortization 13.0us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember		 14.0us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember		  
Finite-Lived Intangible Assets, Net 1.2us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember		 2.2us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember		  
Weighted-average useful lives (in years) 3 years    
Minimum [Member]      
Nature of operations [Abstract]      
Discount rate for goodwill impairment test (in hundredths) 11.70%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Minimum [Member] | Furniture, Fixtures and Autos [Member]      
Property and equipment [Abstract]      
Property, Plant and Equipment, Useful Life 2 years    
Minimum [Member] | Computer Equipment [Member]      
Property and equipment [Abstract]      
Property, Plant and Equipment, Useful Life 2 years    
Maximum [Member]      
Nature of operations [Abstract]      
Discount rate for goodwill impairment test (in hundredths) 17.80%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		    
Maximum [Member] | Buildings [Member]      
Property and equipment [Abstract]      
Property, Plant and Equipment, Useful Life 40 years    
Maximum [Member] | Furniture, Fixtures and Autos [Member]      
Property and equipment [Abstract]      
Property, Plant and Equipment, Useful Life 15 years    
Maximum [Member] | Computer Equipment [Member]      
Property and equipment [Abstract]      
Property, Plant and Equipment, Useful Life 15 years    
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Carrying Amount [Member]      
Fair Value Measurements [Abstract]      
Euro-denominated notes 423.4us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 480.9us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member]      
Fair Value Measurements [Abstract]      
Euro-denominated notes 471.6us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 520.1us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
Recurring Basis [Member]      
Assets [Abstract]      
Foreign currency forward contracts 0.1us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0.3us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Deferred compensation plan assets 81.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 71.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Total assets measured at fair value 81.5us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 71.9us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Recurring Basis [Member] | Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]      
Assets [Abstract]      
Foreign currency forward contracts 0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Deferred compensation plan assets 81.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 71.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Total assets measured at fair value 81.4us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 71.6us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Recurring Basis [Member] | Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member]      
Assets [Abstract]      
Foreign currency forward contracts 0.1us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0.3us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Deferred compensation plan assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Total assets measured at fair value 0.1us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0.3us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Recurring Basis [Member] | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member]      
Assets [Abstract]      
Foreign currency forward contracts 0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
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= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Deferred compensation plan assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		  
Total assets measured at fair value 0us-gaap_AssetsFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
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= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AssetsFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
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= us-gaap_FairValueMeasurementsRecurringMember		  
Allowance for Doubtful Accounts [Member]      
Allowance for doubtful accounts [Abstract]      
Bad debt expense 18.9us-gaap_ProvisionForDoubtfulAccounts
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= us-gaap_AllowanceForDoubtfulAccountsMember		 24.1us-gaap_ProvisionForDoubtfulAccounts
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= us-gaap_AllowanceForDoubtfulAccountsMember		 29.2us-gaap_ProvisionForDoubtfulAccounts
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= us-gaap_AllowanceForDoubtfulAccountsMember
Write-offs of accounts receivable $ 15.8us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= us-gaap_AllowanceForDoubtfulAccountsMember		 $ 26.4us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= us-gaap_AllowanceForDoubtfulAccountsMember		 $ 23.2us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= us-gaap_AllowanceForDoubtfulAccountsMember
[1] Balances were net of accumulated impairment loss of $513.4 as of both December 31, 2014 and 2013.
[2] Balances were net of accumulated impairment loss of $513.4 as of January 1, 2013, December 31, 2013 and December 31, 2014.
[3] Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses, and shown separately.
[4] Balances were net of accumulated impairment loss of $139.5 as of both December 31, 2014 and 2013.