Reorganization Costs (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended								9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 France [Member]	Dec. 31, 2011 France [Member]	Sep. 30, 2012 Italy [Member]	Dec. 31, 2011 Italy [Member]	Sep. 30, 2012 United States [Member]	Dec. 31, 2011 United States [Member]	Sep. 30, 2012 Americas [Member]		Sep. 30, 2012 Southern Europe [Member]		Sep. 30, 2012 Northern Europe [Member]	Sep. 30, 2012 APME [Member]	Sep. 30, 2012 Right Management [Member]
Reorganization Costs [Abstract]
Net reorganization costs	$ 22.2	$ 2.1
Restructuring reserve [Roll Forward]
Beginning balance	29.4		3.4	3.5	0.4	0.4	5.5	3.3	4.0	[1]	4.2	[2]	11.8	1.2	8.2
Severance costs, net	11.1								5.4	[1]	0.5	[2]	2.0	0.2	3.0
Office closure costs, net	11.1								3.5	[1]	0.5	[2]	(0.3)	0	7.4
Costs paid or utilized	(23.8)								(6.9)	[1]	(1.4)	[2]	(6.2)	(1.4)	(7.9)
Ending balance	$ 27.8		$ 3.4	$ 3.5	$ 0.4	$ 0.4	$ 5.5	$ 3.3	$ 6.0	[1]	$ 3.8	[2]	$ 7.3	$ 0	$ 10.7

[1] Balances related to the United States were $3.3 and $5.5 as of January 1, 2012 and September 30, 2012, respectively.

[2] Balances related to France were $3.5 and $3.4 as of January 1, 2012 and September 30, 2012, respectively. Balances related to Italy were $0.4 both as of January 1, 2012 and September 30, 2012.