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v2.4.1.9

Segment Data (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services | $ 5,121.1 us-gaap_SalesRevenueServicesNet |  | $ 5,416.0 us-gaap_SalesRevenueServicesNet | $ 5,321.7 us-gaap_SalesRevenueServicesNet | $ 4,904.0 us-gaap_SalesRevenueServicesNet | $ 5,252.1 us-gaap_SalesRevenueServicesNet |  | $ 5,188.8 us-gaap_SalesRevenueServicesNet | $ 5,040.7 us-gaap_SalesRevenueServicesNet | $ 4,768.9 us-gaap_SalesRevenueServicesNet | $ 20,762.8 us-gaap_SalesRevenueServicesNet | [1] | $ 20,250.5 us-gaap_SalesRevenueServicesNet | [1] | $ 20,678.0 us-gaap_SalesRevenueServicesNet | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 859.1 man_OperatingUnitProfitLoss |  | 639.2 man_OperatingUnitProfitLoss |  | 560.4 man_OperatingUnitProfitLoss |
Corporate expenses |  |  |  |  |  |  |  |  |  |  | (105.8)us-gaap_OperatingExpenses |  | (93.2)us-gaap_OperatingExpenses |  | (112.0)us-gaap_OperatingExpenses |
Intangible asset amortization expense |  |  |  |  |  |  |  |  |  |  | (33.4)us-gaap_AmortizationOfIntangibleAssets | [2] | (34.1)us-gaap_AmortizationOfIntangibleAssets | [2] | (36.7)us-gaap_AmortizationOfIntangibleAssets | [2]
Interest and other expenses |  |  |  |  |  |  |  |  |  |  | (38.3)man_InterestAndOtherNonoperatingExpenses |  | (36.4)man_InterestAndOtherNonoperatingExpenses |  | (43.3)man_InterestAndOtherNonoperatingExpenses |
Earnings before income taxes |  |  |  |  |  |  |  |  |  |  | 681.6 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  | 475.5 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  | 368.4 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
Franchise fees |  |  |  |  |  |  |  |  |  |  | 25.4 us-gaap_FranchiseRevenue |  | 24.4 us-gaap_FranchiseRevenue |  | 23.9 us-gaap_FranchiseRevenue |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 7,182.5 us-gaap_Assets |  |  |  |  | 7,288.3 us-gaap_Assets |  |  |  |  | 7,182.5 us-gaap_Assets |  | 7,288.3 us-gaap_Assets |  | 7,012.6 us-gaap_Assets |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 83.8 us-gaap_DepreciationDepletionAndAmortization |  | 94.3 us-gaap_DepreciationDepletionAndAmortization |  | 100.5 us-gaap_DepreciationDepletionAndAmortization |
Amortization of intangible assets |  |  |  |  |  |  |  |  |  |  | 33.4 us-gaap_AmortizationOfIntangibleAssets | [2] | 34.1 us-gaap_AmortizationOfIntangibleAssets | [2] | 36.7 us-gaap_AmortizationOfIntangibleAssets | [2]
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 3.0 us-gaap_IncomeLossFromEquityMethodInvestments |  | 7.2 us-gaap_IncomeLossFromEquityMethodInvestments |  | 2.5 us-gaap_IncomeLossFromEquityMethodInvestments |
Equity Investments | 132.3 us-gaap_EquityMethodInvestments |  |  |  |  | 140.2 us-gaap_EquityMethodInvestments |  |  |  |  | 132.3 us-gaap_EquityMethodInvestments |  | 140.2 us-gaap_EquityMethodInvestments |  | 85.3 us-gaap_EquityMethodInvestments |
Long-Lived Assets | 154.4 us-gaap_NoncurrentAssets | [3] |  |  |  | 170.6 us-gaap_NoncurrentAssets | [3] |  |  |  | 154.4 us-gaap_NoncurrentAssets | [3] | 170.6 us-gaap_NoncurrentAssets | [3] | 195.4 us-gaap_NoncurrentAssets | [3]
Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 52.0 us-gaap_NoncurrentAssets / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 44.7 us-gaap_NoncurrentAssets / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 52.0 us-gaap_NoncurrentAssets / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 44.7 us-gaap_NoncurrentAssets / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 72.0 us-gaap_NoncurrentAssets / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Americas Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 4,583.7 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [1] | 4,510.2 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [1] | 4,595.9 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 181.6 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 143.7 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 111.4 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 1,816.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  |  |  |  | 1,743.2 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  |  |  |  | 1,816.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 1,743.2 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 1,828.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 13.5 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 16.8 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 17.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |
Equity Investments | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  |  |  |  | 3.0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 3.0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |  | 3.0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember |
Long-Lived Assets | 33.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [3] |  |  |  | 36.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [3] |  |  |  | 33.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [3] | 36.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [3] | 44.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember | [3]
Americas Reportable Segment [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 13.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 10.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 13.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 10.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 16.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Americas Reportable Segment [Member] | United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 3,086.4 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [1],[4] | 2,967.0 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [1],[4] | 3,010.5 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [1],[4]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 125.4 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 99.8 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 60.8 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |
Franchise fees |  |  |  |  |  |  |  |  |  |  | 16.1 us-gaap_FranchiseRevenue / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 15.2 us-gaap_FranchiseRevenue / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 14.6 us-gaap_FranchiseRevenue / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 1,532.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  | 1,476.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  | 1,532.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 1,476.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 1,511.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 9.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 12.3 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 13.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |
Equity Investments | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  | 3.0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 3.0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |  | 3.0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US |
Long-Lived Assets | 25.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [3] |  |  |  | 25.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [3] |  |  |  | 25.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [3] | 25.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [3] | 32.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US | [3]
Americas Reportable Segment [Member] | United States [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 9.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 6.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 9.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 6.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 11.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Americas Reportable Segment [Member] | Other Americas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 1,497.3 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [1] | 1,543.2 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [1] | 1,585.4 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 56.2 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 43.9 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 50.6 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 284.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  |  |  |  | 266.9 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  |  |  |  | 284.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 266.9 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 317.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 4.1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 4.5 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 4.2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |
Equity Investments | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember |
Long-Lived Assets | 8.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [3] |  |  |  | 10.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [3] |  |  |  | 8.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [3] | 10.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [3] | 11.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember | [3]
Americas Reportable Segment [Member] | Other Americas [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 3.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 4.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 3.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 4.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 5.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AmericasMember / us-gaap_StatementGeographicalAxis = man_OtherAmericasReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Southern Europe Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 7,509.7 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [1] | 7,237.0 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [1] | 7,250.9 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 361.7 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 264.6 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 185.1 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 2,371.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  |  |  |  | 2,377.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  |  |  |  | 2,371.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 2,377.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 2,245.2 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 17.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 18.9 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 18.2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0.4 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 0.3 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |
Equity Investments | 0.9 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  |  |  |  | 0.4 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  |  |  |  | 0.9 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 0.4 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |  | 0.1 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember |
Long-Lived Assets | 60.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [3] |  |  |  | 73.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [3] |  |  |  | 60.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [3] | 73.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [3] | 75.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember | [3]
Southern Europe Reportable Segment [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 13.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 16.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 13.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 16.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 29.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Southern Europe Reportable Segment [Member] | France [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 5,351.6 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [1] | 5,284.9 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [1] | 5,425.6 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 275.5 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 198.9 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 129.6 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 1,922.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  |  |  |  | 1,950.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  |  |  |  | 1,922.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 1,950.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 1,756.2 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 13.0 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 14.1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 13.1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0.4 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 0.3 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |
Equity Investments | 0.7 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  |  |  |  | 0.4 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  |  |  |  | 0.7 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 0.4 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |  | 0.1 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR |
Long-Lived Assets | 44.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [3] |  |  |  | 56.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [3] |  |  |  | 44.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [3] | 56.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [3] | 59.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR | [3]
Southern Europe Reportable Segment [Member] | France [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 7.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 10.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 7.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 10.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 25.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_FR / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Southern Europe Reportable Segment [Member] | Italy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 1,178.8 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [1] | 1,087.6 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [1] | 1,056.8 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 64.2 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 53.8 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 45.4 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 230.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  |  |  |  | 218.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  |  |  |  | 230.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 218.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 301.2 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 2.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 2.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 2.7 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |
Equity Investments | 0.2 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  |  |  |  | 0.2 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT |
Long-Lived Assets | 4.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [3] |  |  |  | 6.5 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [3] |  |  |  | 4.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [3] | 6.5 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [3] | 7.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT | [3]
Southern Europe Reportable Segment [Member] | Italy [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 1.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 1.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 1.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 1.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 1.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = country_IT / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Southern Europe Reportable Segment [Member] | Other Southern Europe [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 979.3 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [1] | 864.5 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [1] | 768.5 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 22.0 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 11.9 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 10.1 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 218.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  |  |  |  | 209.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  |  |  |  | 218.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 209.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 187.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 2.2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 2.2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 2.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |
Equity Investments | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember |
Long-Lived Assets | 11.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [3] |  |  |  | 10.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [3] |  |  |  | 11.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [3] | 10.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [3] | 8.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember | [3]
Southern Europe Reportable Segment [Member] | Other Southern Europe [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 4.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 3.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 4.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 3.7 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 2.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_SouthernEuropeMember / us-gaap_StatementGeographicalAxis = man_OtherSouthernEuropeReportableSegmentMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Northern Europe Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 6,048.1 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [1] | 5,738.8 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [1] | 5,773.9 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 198.1 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 139.7 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 159.8 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 1,862.6 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  |  |  |  | 1,951.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  |  |  |  | 1,862.6 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 1,951.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 1,732.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 11.2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 14.0 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 15.8 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 2.6 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 6.9 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 2.5 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |
Equity Investments | 131.1 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  |  |  |  | 136.5 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  |  |  |  | 131.1 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 136.5 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |  | 81.5 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember |
Long-Lived Assets | 29.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [3] |  |  |  | 30.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [3] |  |  |  | 29.0 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [3] | 30.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [3] | 40.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember | [3]
Northern Europe Reportable Segment [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 13.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 8.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 13.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 8.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 12.8 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_NorthernEuropeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
APME Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 2,327.1 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [1] | 2,447.7 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [1] | 2,728.8 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 84.2 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 70.8 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 90.7 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 501.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  |  |  |  | 466.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  |  |  |  | 501.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 466.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 491.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 4.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 4.8 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 4.9 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |
Equity Investments | 0.3 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  |  |  |  | 0.3 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  |  |  |  | 0.3 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 0.3 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |  | 0.7 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember |
Long-Lived Assets | 20.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [3] |  |  |  | 19.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [3] |  |  |  | 20.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [3] | 19.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [3] | 22.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember | [3]
APME Reportable Segment [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 7.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 4.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 7.9 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 4.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 5.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_ApmeMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Right Management Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 294.2 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [1] | 316.8 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [1] | 328.5 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [1]
Operating Unit Profit |  |  |  |  |  |  |  |  |  |  | 33.5 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 20.4 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 13.4 man_OperatingUnitProfitLoss / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 139.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  |  |  |  | 134.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  |  |  |  | 139.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 134.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 95.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 3.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 4.3 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 5.1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |
Earnings from Equity Investments |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |
Equity Investments | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember |
Long-Lived Assets | 10.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [3] |  |  |  | 11.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [3] |  |  |  | 10.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [3] | 11.3 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [3] | 12.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember | [3]
Right Management Reportable Segment [Member] | Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 3.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 4.5 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  |  |  |  | 3.6 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 4.5 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |  | 7.4 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_RightManagementMember / us-gaap_SubsegmentsAxis = man_AdditionsMember |
Corporate Expenses Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 491.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [5] |  |  |  | 614.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [5] |  |  |  | 491.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [5] | 614.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [5] | 619.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [5]
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 0.1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember |  | 1.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember |  | 2.2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember |
Long-Lived Assets | 0.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [3] |  |  |  | 0.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [3] |  |  |  | 0.1 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [3] | 0.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [3] | 1.2 us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = man_CorporateReportableSegmentMember | [3]
Geographical Components [Member] | United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 3,190.6 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |  | 3,080.8 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |  | 3,132.0 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 30.2 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  | 30.6 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  | 30.2 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |  | 30.6 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |  | 39.7 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US |
Geographical Components [Member] | France [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 5,378.6 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |  | 5,313.6 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |  | 5,448.3 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 46.0 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |  |  |  |  | 57.8 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |  |  |  |  | 46.0 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |  | 57.8 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |  | 61.0 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_FR |
Geographical Components [Member] | Italy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 1,183.4 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |  | 1,093.0 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |  | 1,061.6 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 4.7 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |  |  |  |  | 6.5 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |  |  |  |  | 4.7 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |  | 6.5 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |  | 7.1 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_IT |
Geographical Components [Member] | United Kingdom [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 2,168.6 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |  | 1,884.5 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |  | 1,898.1 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | 10.3 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |  |  |  |  | 7.4 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |  |  |  |  | 10.3 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |  | 7.4 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |  | 11.0 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_GB |
Geographical Components [Member] | Total Foreign [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  |  |  |  | 17,572.2 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |  | 17,169.7 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |  | 17,546.0 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |
Other segment disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | $ 124.2 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |  |  |  |  | $ 140.0 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |  |  |  |  | $ 124.2 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |  | $ 140.0 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |  | $ 155.7 us-gaap_NoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = man_TotalForeignMember |
[1] | Further breakdown of revenues from services by geographical region is as follows: Revenues from Services 2014 2013 2012 United States $3,190.6 $3,080.8 $3,132.0 France 5,378.6 5,313.6 5,448.3 Italy 1,183.4 1,093.0 1,061.6 United Kingdom 2,168.6 1,884.5 1,898.1 Total Foreign 17,572.2 17,169.7 17,546.0
[2] | Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses, and shown separately.
[3] | Further breakdown of long-lived assets by geographical region was as follows: Long-Lived Assets 2014 2013 2012 United States $30.2 $30.6 $39.7 France 46.0 57.8 61.0 Italy 4.7 6.5 7.1 United Kingdom 10.3 7.4 11.0 Total Foreign 124.2 140.0 155.7
[4] | The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $16.1, $15.2 and $14.6 for 2014, 2013 and 2012, respectively.
[5] | Corporate assets include assets that were not used in the operations of any segment, the most significant of which were purchased intangibles and cash.

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