Consolidated Statements Of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Consolidated Statements of Operations (Unaudited) [Abstract]
Revenues from services	$ 5,040.7	[1]	$ 5,206.7	[1]	$ 9,809.6	[1]	$ 10,303.1	[1]
Cost of services	4,204.3		4,345.0		8,183.1		8,594.0
Gross profit	836.4		861.7		1,626.5		1,709.1
Selling and administrative expenses	708.3		767.3		1,444.0		1,520.9
Operating profit	128.1		94.4		182.5		188.2
Interest and other expenses	10.3		11.3		21.8		23.1
Earnings before income taxes	117.8		83.1		160.7		165.1
Provision for income taxes	49.6		42.1		68.6		83.9
Net earnings	$ 68.2		$ 41.0		$ 92.1		$ 81.2
Net earnings per share - basic (in dollars per share)	$ 0.88		$ 0.51		$ 1.19		$ 1.01
Net earnings per share - diluted (in dollars per share)	$ 0.87		$ 0.51		$ 1.17		$ 1.01
Weighted average shares - basic (in shares)	77.4		80.1		77.3		80.1
Weighted average shares - diluted (in shares)	78.6		80.4		78.6		80.8

[1] Our consolidated revenues from services include fees received from our franchise offices of $6.1 million for both the three months ended June 30, 2013 and 2012, and $11.4 million and $11.5 million for the six months ended June 30, 2013 and 2012, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $272.3 million and $270.0 million for the three months ended June 30, 2013 and 2012, respectively, and $507.0 million and $523.9 million for the six months ended June 30, 2013 and 2012, respectively.