Consolidated Statements Of Operations (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Income Statement [Abstract]
Revenues from services	$ 5,667.3	[1]	$ 4,585.6	[1]	$ 10,739.7	[1]	$ 8,684.9	[1]
Cost of services	4,705.1		3,788.6		8,919.9		7,186.4
Gross profit	962.2		797.0		1,819.8		1,498.5
Selling and administrative expenses	811.4		717.9		1,583.4		1,386.8
Operating profit	150.8		79.1		236.4		111.7
Interest and other expenses	11.8		11.9		22.9		24.8
Earnings before income taxes	139.0		67.2		213.5		86.9
Provision for income taxes	66.3		34.5		105.1		51.4
Net earnings	$ 72.7		$ 32.7		$ 108.4		$ 35.5
Net earnings per share - basic	$ 0.89		$ 0.40		$ 1.32		$ 0.44
Net earnings per share - diluted	$ 0.87		$ 0.40		$ 1.30		$ 0.44
Weighted average shares - basic	82.0		81.5		82.0		80.1
Weighted average shares - diluted	83.3		82.5		83.7		81.2

[1] Our consolidated Revenues from Services include fees received from our franchise offices of $5.7 and $5.8 for the three months ended June 30, 2011 and 2010, respectively, and $11.6 and $10.4 for six months ending June 30, 2011 and 2010, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $249.6 and $237.3 for the three months ended June 30, 2011 and 2010, respectively and $524.1 and $431.2 for the six months ended June 30, 2011 and 2010, respectively.