Segment Data (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	$ 5,667.3	[1]	$ 4,585.6	[1]	$ 10,739.7	[1]	$ 8,684.9	[1]
Franchise fees	5.7		5.8		11.6		10.4
Franchise revenue	249.6		237.3		524.1		431.2
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	1,171.0		1,032.7		2,283.7		1,809.9
Americas [Member] | United States [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	791.6	[2]	726.6	[2]	1,542.5	[2]	1,209.3	[2]
Franchise fees	3.2		3.4		5.9		5.9
Franchise revenue	163.2		155.8		311.7		288.0
Americas [Member] | Other Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	379.4		306.1		741.2		600.6
Southern Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	2,182.6		1,683.2		4,001.0		3,183.3
Southern Europe [Member] | France [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	1,644.0		1,255.9		2,997.8		2,363.4
Southern Europe [Member] | Italy [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	344.9		258.8		629.5		493.0
Southern Europe [Member] | Other Southern Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	193.7		168.5		373.7		326.9
Northern Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	1,566.3		1,265.2		3,022.9		2,486.4
APME [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	662.8		505.7		1,265.7		1,003.2
Right Management [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from services	$ 84.6		$ 98.8		$ 166.4		$ 202.1

[1] Our consolidated Revenues from Services include fees received from our franchise offices of $5.7 and $5.8 for the three months ended June 30, 2011 and 2010, respectively, and $11.6 and $10.4 for six months ending June 30, 2011 and 2010, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $249.6 and $237.3 for the three months ended June 30, 2011 and 2010, respectively and $524.1 and $431.2 for the six months ended June 30, 2011 and 2010, 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 $3.2 and $3.4 for the three months ended June 30, 2011 and 2010, respectively, and $5.9 for the six months ended June 30, 2011 and 2010. These fees are primarily based on revenues generated by the franchise offices, which were $163.2 and $155.8 for the three months ended June 30, 2011 and 2010, respectively, and $311.7 and $288.0 for the six months ended June 30, 2011 and 2010, respectively.