Consolidated Statements of Earnings (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Revenue from services	$ 1,366.9	$ 1,366.1	$ 2,681.7	$ 2,720.9
Cost of services	1,146.2	1,142.9	2,244.1	2,274.0
Gross profit	220.7	223.2	437.6	446.9
Selling, general and administrative expenses	202.6	199.4	412.4	408.4
Asset impairments	1.7		1.7
Earnings from operations	16.4	23.8	23.5	38.5
Other expense, net	1.6	0.5	2.6	1.1
Earnings from continuing operations before taxes	14.8	23.3	20.9	37.4
Income tax expense (benefit)	4.8	8.3	(2.0)	13.2
Earnings from continuing operations	10.0	15.0	22.9	24.2
Earnings from discontinued operations, net of tax	0	0	0	0.4
Net earnings	$ 10.0	$ 15.0	$ 22.9	$ 24.6
Basic earnings per share:
Earnings from continuing operations (in Dollars per share)	$ 0.26	$ 0.40	$ 0.60	$ 0.64
Earnings from discontinued operations (in Dollars per share)	$ 0	$ 0	$ 0	$ 0.01
Net earnings (in Dollars per share)	$ 0.26	$ 0.40	$ 0.60	$ 0.65
Diluted earnings per share:
Earnings from continuing operations (in Dollars per share)	$ 0.26	$ 0.40	$ 0.60	$ 0.64
Earnings from discontinued operations (in Dollars per share)	$ 0	$ 0	$ 0	$ 0.01
Net earnings (in Dollars per share)	$ 0.26	$ 0.40	$ 0.60	$ 0.65
Dividends per share (in Dollars per share)	$ 0.05	$ 0.05	$ 0.10	$ 0.10
Average shares outstanding (millions):
Basic (in Shares)	37.2	37.0	37.2	36.9
Diluted (in Shares)	37.2	37.0	37.2	37.0