Goodwill and Other Intangible Assets, Changes in Goodwill (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 984.7	[1]
Goodwill acquired	33.1
Currency and other impacts	(3.8)
Goodwill, end of period	1,014.0	[1]
Accumulated impairment loss	513.4		513.4
Americas [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	461.8	[2]
Goodwill acquired	4.8
Currency and other impacts	0.1
Goodwill, end of period	466.7	[2]
United States [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period			448.3
Goodwill, end of period	448.5		448.3
Southern Europe [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	59.5	[3]
Goodwill acquired	28.3
Currency and other impacts	(1.4)
Goodwill, end of period	86.4	[3]
France [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period			42.1
Goodwill, end of period	69.5		42.1
Italy [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period			5.4
Goodwill, end of period	5.2		5.4
Northern Europe [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	260.7
Goodwill acquired	0
Currency and other impacts	(0.6)
Goodwill, end of period	260.1
APME [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	77.5
Goodwill acquired	0
Currency and other impacts	(2.2)
Goodwill, end of period	75.3
Right Management [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	60.3
Goodwill acquired	0
Currency and other impacts	0.3
Goodwill, end of period	60.6
Corporate [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	64.9	[4]
Goodwill acquired	0
Currency and other impacts	0
Goodwill, end of period	64.9	[4]
Jefferson Wells [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period			55.5
Goodwill, end of period	$ 55.5		$ 55.5

[1] Balances were net of accumulated impairment loss of $513.4 as of both January 1, 2012 and June 30, 2012.

[2] Balances related to the United States were $448.3 and $448.5 as of January 1, 2012 and June 30, 2012, respectively.

[3] Balances related to France were $42.1 and $69.5 as of January 1, 2012 and June 30, 2012, respectively. Balances related to Italy were $5.4 and $5.2 as of January 1, 2012 and June 30, 2012, respectively.

[4] The majority of the Corporate balance relates to goodwill attributable from 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.