Net Income (Loss) Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013	Jun. 24, 2012
Earnings Per Share [Abstract]
Loss from continuing operations available for common stockholders (A)	$ (7.1)	$ (14.9)	$ (15.5)	$ (17.4)
Weighted average outstanding shares of common stock (B) (in shares)	56.6	41.7	56.6	37.1
Dilutive effect of employee stock options and awards (in shares)	0	0	0	0
Common stock and common stock equivalents (C) (in shares)	56.6	41.7	56.6	37.1
Basic (A/B) (in dollars per share)	$ (0.12)	$ (0.36)	$ (0.27)	$ (0.47)
Diluted (A/C) (in dollars per share)	$ (0.12)	$ (0.36)	$ (0.27)	$ (0.47)