Goodwill and Other Intangible Assets (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011		Dec. 31, 2010
Schedule Of Intangible Assets [Line Items]
Goodwill	$ 989.0	[1]
Amortizable intangible assets [Abstract]
Gross	380.9		361.0
Accumulated Amortization	166.6		138.1
Net	214.3		222.9
Non-amortizable intangible assets [Abstract]
Non-amortizable intangible assets	153.1		153.3
Accumulated impairment loss	513.4
Intangible assets [Abstract]
Gross	534.0		514.3
Accumulated Amortization	166.6		138.1
Net	367.4		376.2
Goodwill [Roll Forward]
Balance, beginning of period	954.1	[1]
Goodwill acquired	41.8
Currency and other impacts	(6.9)
Balance, end of period	989.0	[1]
Accumulated impairment loss, beginning of period	513.4
Accumulated impairment loss, end of period	513.4
Technology [Member]
Amortizable intangible assets [Abstract]
Gross	19.6		19.6
Accumulated Amortization	19.6		19.6
Net	0		0
Intangible assets [Abstract]
Accumulated Amortization	19.6		19.6
Franchise Agreements [Member]
Amortizable intangible assets [Abstract]
Gross	18.0		18.0
Accumulated Amortization	13.8		12.5
Net	4.2		5.5
Intangible assets [Abstract]
Accumulated Amortization	13.8		12.5
Customer Relationships [Member]
Amortizable intangible assets [Abstract]
Gross	329.8		309.4
Accumulated Amortization	121.2		94.3
Net	208.6		215.1
Intangible assets [Abstract]
Accumulated Amortization	121.2		94.3
Other Intangible Assets [Member]
Amortizable intangible assets [Abstract]
Gross	13.5		14.0
Accumulated Amortization	12.0		11.7
Net	1.5		2.3
Intangible assets [Abstract]
Accumulated Amortization	12.0		11.7
Tradenames [Member]
Non-amortizable intangible assets [Abstract]
Non-amortizable intangible assets	55.3	[2]	55.3	[2]
Accumulated impairment loss	139.5		139.5
Goodwill [Roll Forward]
Accumulated impairment loss, beginning of period			139.5
Accumulated impairment loss, end of period	139.5		139.5
Reacquired Franchise Rights [Member]
Non-amortizable intangible assets [Abstract]
Non-amortizable intangible assets	97.8		98.0
Americas [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	461.4	[3]
Goodwill [Roll Forward]
Balance, beginning of period	465.5	[3]
Goodwill acquired	0
Currency and other impacts	(4.1)
Balance, end of period	461.4	[3]
Americas [Member] | United States [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	448.3		451.7
Goodwill [Roll Forward]
Balance, beginning of period			451.7
Balance, end of period	448.3		451.7
Southern Europe [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	60.4	[4]
Goodwill [Roll Forward]
Balance, beginning of period	33.1	[4]
Goodwill acquired	27.7
Currency and other impacts	(0.4)
Balance, end of period	60.4	[4]
Southern Europe [Member] | France [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	43.5		15.8
Goodwill [Roll Forward]
Balance, beginning of period			15.8
Balance, end of period	43.5		15.8
Southern Europe [Member] | Italy [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	4.6		4.6
Goodwill [Roll Forward]
Balance, beginning of period			4.6
Balance, end of period	4.6		4.6
Northern Europe [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	263.7
Goodwill [Roll Forward]
Balance, beginning of period	265.1
Goodwill acquired	0
Currency and other impacts	(1.4)
Balance, end of period	263.7
APME [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	78.9
Goodwill [Roll Forward]
Balance, beginning of period	64.9
Goodwill acquired	14.1
Currency and other impacts	(0.1)
Balance, end of period	78.9
Right Management [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	59.7
Goodwill [Roll Forward]
Balance, beginning of period	60.6
Goodwill acquired	0
Currency and other impacts	(0.9)
Balance, end of period	59.7
Corporate [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	64.9	[5]
Goodwill [Roll Forward]
Balance, beginning of period	64.9	[5]
Goodwill acquired	0
Currency and other impacts	0
Balance, end of period	64.9	[5]
Goodwill attributable from acquisition of Jefferson Wells	55.5
Other reporting units [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	220.6		181.2
Goodwill [Roll Forward]
Balance, beginning of period			181.2
Balance, end of period	220.6		181.2
United States [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	503.8		507.2
Goodwill [Roll Forward]
Balance, beginning of period			507.2
Balance, end of period	503.8		507.2
Elan [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	123.0		123.2
Goodwill [Roll Forward]
Balance, beginning of period			123.2
Balance, end of period	123.0		123.2
Netherlands (Vitae) [Member]
Schedule Of Intangible Assets [Line Items]
Goodwill	81.9		81.9
Goodwill [Roll Forward]
Balance, beginning of period			81.9
Balance, end of period	$ 81.9		$ 81.9

[1] Balances were net of accumulated impairment loss of $513.4 as of both January 1, 2011 and September 30, 2011.

[2] Balances were net of accumulated impairment loss of $139.5 as of both September 30, 2011 and December 31, 2010.

[3] Balances related to the United States were $451.7 and $448.3 as of January 1, 2011 and September 30, 2011, respectively.

[4] Balances related to France were $15.8 and $43.5 as of January 1, 2011 and September 30, 2011, respectively. Balances related to Italy were $4.6 as of both January 1, 2011 and September 30, 2011.

[5] 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.