Earnings (Loss) per Share - Reconciliations Between Basic and Diluted Loss Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share [Abstract]
Net earnings (loss)	$ (12.5)	$ 4.7	$ 18.5	$ (1.2)	$ (0.8)	$ (2.1)	$ (31.9)	$ (21.1)	$ 9.5	$ (55.9)	$ (13.4)
Weighted average common shares outstanding (in shares)									15,152,286	15,122,976	15,000,000
Dilutive effect of common share equivalents (in shares)									378,919	0	0
Dilutive shares outstanding (in shares)									15,531,205	15,122,976	15,000,000
Basic earnings (loss) per share	$ (0.82)	$ 0.31	$ 1.22	$ (0.08)	$ (0.05)	$ (0.14)	$ (2.11)	$ (1.40)	$ 0.63	$ (3.70)	$ (0.89)
Diluted earnings (loss) per share	$ (0.82)	$ 0.30	$ 1.19	$ (0.08)	$ (0.05)	$ (0.14)	$ (2.11)	$ (1.40)	$ 0.61	$ (3.70)	$ (0.89)