Summary of Significant Accounting Policies (Adjustments in Consolidated Statement of Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Accounting Policies [Abstract]
Cost of sales									$ 5,400.1		$ 5,259.0		$ 4,319.2
Operating income									194.8		230.1		214.1
Income tax provision									(74.2)		(42.7)		(46.7)
Net income including noncontrolling interest									9.8		67.1		69.1
Net income attributable to Company common shareholders	$ (17.2)	$ (20.6)	$ 18.8	$ 22.7	$ 0.6	$ (2.1)	$ 33.2	$ 34.0	$ 3.7	[1]	$ 65.7	[1]	$ 61.4	[1]
Earnings per common share - basic	$ (0.35)	$ (0.41)	$ 0.38	$ 0.46	$ 0.01	$ (0.04)	$ 0.64	$ 0.65	$ 0.07	[2]	$ 1.27	[2]	$ 1.18	[2]
Earnings per common share - assuming dilution	$ (0.35)	$ (0.41)	$ 0.37	$ 0.45	$ 0.01	$ (0.04)	$ 0.61	$ 0.63	$ 0.08		$ 1.23		$ 1.16

[1] Numerator

[2] Under the two class method, Earnings per share — basic reflects undistributed earnings per share for both common stock and unvested share-based payment awards (restricted stock).