Segment Data (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	$ 5,321.7	[1]	$ 5,040.7	[1]	$ 10,225.7	[1]	$ 9,809.6	[1]
Operating profit	187.4		128.1		314.3		182.5
Interest and other expenses	(7.9)		(10.3)		(17.1)		(21.8)
Earnings before income taxes	179.5		117.8		297.2		160.7
Franchise fees	6.4		6.1		11.9		11.4
Franchise revenue	286.6		272.3		543.2		507.0
Americas [Member] | United States [Member] | Reportable Subsegments [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	775.9	[2]	748.5	[2]	1,496.4	[2]	1,454.6	[2]
Operating Unit Profit (Loss)	29.7	[3]	30.6	[3]	43.1	[3]	38.0	[3]
Americas [Member] | Other Americas [Member] | Reportable Subsegments [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	375.2		387.2		725.8		774.1
Operating Unit Profit (Loss)	14.0	[3]	11.9	[3]	26.6	[3]	20.6	[3]
Southern Europe [Member] | France [Member] | Reportable Subsegments [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	1,412.1		1,320.6		2,629.4		2,465.8
Operating Unit Profit (Loss)	71.9	[3]	40.9	[3]	123.1	[3]	70.6	[3]
Southern Europe [Member] | Italy [Member] | Reportable Subsegments [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	313.9		278.4		588.6		536.3
Operating Unit Profit (Loss)	18.3	[3]	14.7	[3]	30.9	[3]	26.4	[3]
Southern Europe [Member] | Other Southern Europe [Member] | Reportable Subsegments [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	243.0		203.0		473.0		396.4
Operating Unit Profit (Loss)	5.7	[3]	1.2	[3]	10.3	[3]	3.5	[3]
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Operating Unit Profit (Loss)	219.5	[3]	160.1	[3]	380.8		247.3
Operating Segments [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	1,151.1		1,135.7		2,222.2		2,228.7
Operating Unit Profit (Loss)	43.7	[3]	42.5	[3]	69.7	[3]	58.6	[3]
Operating Segments [Member] | Americas [Member] | United States [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Franchise fees	3.9		3.8		7.3		7.0
Franchise revenue	190.3		175.3		359.4		330.4
Operating Segments [Member] | Southern Europe [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	1,969.0		1,802.0		3,691.0		3,398.5
Operating Unit Profit (Loss)	95.9	[3]	56.8	[3]	164.3	[3]	100.5	[3]
Operating Segments [Member] | Northern Europe [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	1,527.8		1,398.8		2,991.7		2,769.1
Operating Unit Profit (Loss)	46.2	[3]	33.2	[3]	84.6	[3]	43.8	[3]
Operating Segments [Member] | APME [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	594.0		623.3		1,167.7		1,255.8
Operating Unit Profit (Loss)	21.0	[3]	20.2	[3]	41.2	[3]	35.0	[3]
Operating Segments [Member] | Right Management [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Revenues from services	79.8		80.9		153.1		157.5
Operating Unit Profit (Loss)	12.7	[3]	7.4	[3]	21.0	[3]	9.4	[3]
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Corporate expenses	(23.7)		(23.6)		(49.9)		(48.0)
Segment Reconciling Items [Member]
Segment Reporting, Reconciling Item for Operating Profit from Segment to Consolidated [Line Items]
Intangible asset amortization expense	$ (8.4)	[3]	$ (8.4)	[3]	$ (16.6)	[3]	$ (16.8)	[3]

[1] Our consolidated revenues from services include fees received from our franchise offices of $6.4 and $6.1 for the three months ended June 30, 2014 and 2013, and $11.9 and $11.4 for the six months ended June 30, 2014 and 2013, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $286.6 and $272.3 for the three months ended June 30, 2014 and 2013, respectively, and $543.2 and $507.0 for the six months ended June 30, 2014 and 2013, respectively.

[2] In the United States, where a majority of our franchises operate, revenues from services included fees received from the related franchise offices of $3.9 and $3.8 for the three months ended June 30, 2014 and 2013, and $7.3 and $7.0 for the six months ended June 30, 2014 and 2013, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $190.3 and $175.3 for the three months ended June 30, 2014 and 2013, respectively, and $359.4 and $330.4 for the six months ended June 30, 2014 and 2013, respectively.

[3] We evaluate segment performance based on operating unit profit (“OUP”), which is equal to segment revenues less cost of services and branch and national headquarters operating costs. This profit measure does not include goodwill and intangible asset impairment charges or amortization of intangibles related to acquisitions, interest and other income and expense amounts or income taxes.