Goodwill and Other Intangible Assets, Changes in Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended						3 Months Ended				3 Months Ended
	Mar. 31, 2014		Mar. 31, 2014 France [Member]	Dec. 31, 2013 France [Member]	Mar. 31, 2014 Italy [Member]	Dec. 31, 2013 Italy [Member]	Mar. 31, 2014 Americas [Member]		Mar. 31, 2014 Americas [Member] United States [Member]	Dec. 31, 2013 Americas [Member] United States [Member]	Mar. 31, 2014 Southern Europe [Member]		Mar. 31, 2014 Northern Europe [Member]	Mar. 31, 2014 APME [Member]	Mar. 31, 2014 Right Management [Member]	Mar. 31, 2014 Corporate [Member]		Mar. 31, 2014 Jefferson Wells [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 1,090.9	[1]	$ 87.5	$ 87.3	$ 5.7	$ 5.7	$ 465.9	[2]	$ 448.5	$ 448.5	$ 107.8	[3]	$ 318.2	$ 72.0	$ 62.1	$ 64.9	[4]	$ 55.5
Goodwill acquired	7.2						0	[2]			0	[3]	6.5	0.7	0	0	[4]
Currency and other impacts	0.8						(0.7)	[2]			0.2	[3]	(0.6)	1.9	0	0	[4]
Goodwill, end of period	$ 1,098.9	[1]	$ 87.5	$ 87.3	$ 5.7	$ 5.7	$ 465.2	[2]	$ 448.5	$ 448.5	$ 108.0	[3]	$ 324.1	$ 74.6	$ 62.1	$ 64.9	[4]	$ 55.5

[1] Balances were net of accumulated impairment loss of $513.4 as of both March 31, 2014 and December 31, 2013.

[2] Balances related to the United States were $448.5 as of both January 1, 2014 and March 31, 2014.

[3] Balances related to France were $87.3 and $87.5 as of January 1, 2014 and March 31, 2014, respectively. Balances related to Italy were $5.7 as of both January 1, 2014 and March 31, 2014.

[4] The majority of the Corporate balance relates to goodwill attributable to our acquisition of Jefferson Wells ($55.5) which is now part of the United States reporting unit. For purposes of monitoring our total assets by segment, we do not allocate the Corporate balance to the respective reportable segments as this is commensurate with how we operate our business. We do, however, include these balances within the appropriate reporting units for our goodwill impairment testing. See table below for the breakout of goodwill balances by reporting unit.