Percentage to be applied to the eligible wages for calculation of the CICE payroll tax credit.

No definition available.

Name:	man_CICEPayrollTaxCredit
Namespace Prefix:	man_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Multiplier to the French minimum wage for the purpose of determining eligibility for the French payroll tax credit. Credit d'Impot pur la Competitive et l'Emploi ("CICE"), French legislation, provides payroll tax credit on a percentage of wages paid to employees receiving less than this number times the French minimum wage.

+ References

No definition available.

+ Details

Name:	man_MultiplierForPayrollTaxCredits
Namespace Prefix:	man_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The carry-forward period after which the remaining CICE payroll tax credit will be paid.

+ References

No definition available.

+ Details

Name:	man_PaymentPeriodOfTheCICEPayrollTaxCredit
Namespace Prefix:	man_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash inflow from the sale of receivables classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfOtherReceivables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Summary of Significant Accounting Policies - Payroll Tax Credit (Details) € in Millions, $ in Millions	1 Months Ended						12 Months Ended
	Apr. 30, 2018 USD ($)	Apr. 30, 2018 EUR (€)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 EUR (€)	Mar. 31, 2016 USD ($)	Mar. 31, 2016 EUR (€)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
CICE payroll tax credit							6.00%	7.00%	6.00%	6.00%	6.00%	4.00%
Multiplier for payroll tax credits							2.5
Payment period							3 years
Net proceeds	$ 234.5	€ 190.9	$ 143.5	€ 133.0	$ 143.1	€ 129.9