Net Income (Loss) Per Common Share (Reconciliation of basic and diluted EPS) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010 participating_security	Mar. 08, 2011 Common stock	Dec. 26, 2010 Common stock	Mar. 08, 2011 Series B Convertible Preferred Stock	Dec. 26, 2010 Series B Convertible Preferred Stock
Class of Stock [Line Items]
Number of classes of participating securities before conversion			2
Percentage of outstanding shares represented by each class of stock					99.00%		1.00%
Number of shares of preferred stock converted						(10,000)
Number of shares of common stock issued upon conversion of preferred stock				100,000
Earnings Per Share Reconciliation [Abstract]
Net income (loss) from continuing operations	$ (112.9)	$ (23.5)	$ 14.6
Less net income from continuing operations allocated to preferred shareholders	0	0	(0.1)
Net income (loss) from continuing operations allocated to common shareholders (A)	$ (112.9)	$ (23.5)	$ 14.5
Weighted average outstanding shares of common stock (B)	46,900,000	27,400,000	16,500,000
Weighted average shares from preferred stock	0	0	100,000
Basic weighted average outstanding shares of common stock and participating securities	46,900,000	27,400,000	16,600,000
Dilutive effect of employee stock options and awards	0	0	300,000
Common stock and common stock equivalents (C)	46,900,000	27,400,000	16,900,000
Basic (A/B) (in dollars per share)	$ (2.41)	$ (0.86)	$ 0.88
Diluted (A/C) (in dollars per share)	$ (2.41)	$ (0.86)	$ 0.87