Restructuring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 France [Member]	Dec. 31, 2012 France [Member]	Mar. 31, 2013 Italy [Member]	Dec. 31, 2012 Italy [Member]	Mar. 31, 2013 United States [Member]	Dec. 31, 2012 United States [Member]	Mar. 31, 2013 Americas [Member]		Mar. 31, 2013 Southern Europe [Member]		Mar. 31, 2013 Northern Europe [Member]	Mar. 31, 2013 APME [Member]	Mar. 31, 2013 Right Management [Member]	Mar. 31, 2013 Corporate [Member]
Restructuring Costs [Abstract]
Net restructuring costs	$ 34.8	$ 0.1
Restructuring reserve [Roll Forward]
Beginning balance	41.4		3.5	3.8	0.2	0.9	4.1	3.8	4.5	[1]	4.7	[2]	15.6	0	6.6	10.0
Severance costs	24.1								5.8	[1]	1.2	[2]	9.6	1.2	2.1	4.2
Office closure costs	10.7								0.1	[1]	0	[2]	7.5	1.2	1.7	0.2
Costs paid or utilized	(24.8)								(5.8)	[1]	(2.2)	[2]	(8.0)	(0.2)	(1.0)	(7.6)
Ending balance	$ 51.4		$ 3.5	$ 3.8	$ 0.2	$ 0.9	$ 4.1	$ 3.8	$ 4.6	[1]	$ 3.7	[2]	$ 24.7	$ 2.2	$ 9.4	$ 6.8

[1] Balances related to the United States were $3.8 and $4.1 as of January 1, 2013 and March 31, 2013, respectively.

[2] Balances related to France were $3.8 and $3.5 as of January 1, 2013 and March 31, 2013, respectively. Balances related to Italy were $0.9 and $0.2 as of January 1, 2013 and March 31, 2013, respectively.