Reorganization Costs (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended								6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 France [Member]	Dec. 31, 2011 France [Member]	Jun. 30, 2012 Italy [Member]	Dec. 31, 2011 Italy [Member]	Jun. 30, 2012 United States [Member]	Dec. 31, 2011 United States [Member]	Jun. 30, 2012 Americas [Member]		Jun. 30, 2012 Southern Europe [Member]		Jun. 30, 2012 Northern Europe [Member]	Jun. 30, 2012 APME [Member]	Jun. 30, 2012 Right Management [Member]	Jun. 30, 2012 Corporate [Member]
Reorganization Costs [Abstract]
Net reorganization costs	$ 21.0	$ 1.6
Restructuring reserve [Roll Forward]
Beginning balance	29.4		3.4	3.5	0.2	0.4	7.9	3.3	4.0	[1]	4.2	[2]	11.8	1.2	8.2	0
Severance costs, net	9.9								4.8	[1]	0.2	[2]	1.9	0	3.0	0
Office closure costs, net	11.1								3.5	[1]	0.5	[2]	(0.3)	0	7.4	0
Costs paid or utilized	(14.5)								(2.6)	[1]	(1.4)	[2]	(4.4)	(1.2)	(4.9)	0
Ending balance	$ 35.9		$ 3.4	$ 3.5	$ 0.2	$ 0.4	$ 7.9	$ 3.3	$ 9.7	[1]	$ 3.5	[2]	$ 9.0	$ 0	$ 13.7	$ 0

[1] Balances related to the United States were $3.3 and $7.9 as of January 1, 2012 and June 30, 2012, respectively.

[2] Balances related to France were $3.5 and $3.4 as of January 1, 2012 and June 30, 2012, respectively. Balances related to Italy were $0.4 and $0.2 as of January 1, 2012 and June 30, 2012, respectively.