Consolidated Statements of Earnings (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Consolidated Statements of Earnings [Abstract]
Revenue from services	$ 1,409.8	$ 1,284.7	$ 4,154.7	$ 3,624.5
Cost of services	1,181.2	1,077.5	3,487.8	3,046.4
Gross profit	228.6	207.2	666.9	578.1
Selling, general and administrative expenses	206.5	192.9	621.9	555.4
Asset impairments				1.5
Earnings from operations	22.1	14.3	45.0	21.2
Other income (expense), net	1.0	(1.5)	(0.1)	(4.7)
Earnings from continuing operations before taxes	23.1	12.8	44.9	16.5
Income taxes	3.4	3.2	4.1	5.0
Earnings from continuing operations	19.7	9.6	40.8	11.5
Loss from discontinued operations, net of tax			(1.2)
Net earnings	$ 19.7	$ 9.6	$ 39.6	$ 11.5
Basic earnings (loss) per share:
Earnings from continuing operations	$ 0.52	$ 0.26	$ 1.09	$ 0.32
Loss from discontinued operations			$ (0.03)
Net earnings	$ 0.52	$ 0.26	$ 1.05	$ 0.32
Diluted earnings (loss) per share:
Earnings from continuing operations	$ 0.52	$ 0.26	$ 1.09	$ 0.32
Loss from discontinued operations			$ (0.03)
Net earnings	$ 0.52	$ 0.26	$ 1.05	$ 0.32
Dividends per share	$ 0.05	$ 0	$ 0.05	$ 0
Average shares outstanding (millions):
Basic	36.8	36.7	36.8	35.9
Diluted	36.8	36.7	36.8	35.9