Earnings (Loss) Per Common Share (Reconciliation Of The Numerator And Denominator Of Earnings (Loss) Per Common Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 27, 2014		Jun. 28, 2013		Jun. 27, 2014		Jun. 28, 2013
Earnings Per Share [Abstract]
Net income for basic EPS computation	$ (24.8)		$ 8.2		$ (340.2)		$ (37.6)
Less: Net income allocated to participating securities	0	[1]	0		0	[1]	0	[1]
Net income (loss) for basic EPS computations	(24.8)	[2]	8.2	[2]	(340.2)	[2]	(37.6)	[2]
Weighted average shares outstanding for basic EPS computation	48.7	[3]	49.5	[3]	48.9	[3]	49.6	[3]
Earnings per common share - basic	$ (0.51)	[4]	$ 0.17	[4]	$ (6.96)	[4]	$ (0.76)	[4]
Add: preferred stock dividends, if applicable	0		0.1		0		0
Net income for diluted EPS computation	$ (24.8)	[2]	$ 8.3	[2]	$ (340.2)	[2]	$ (37.6)	[2]
Weighted average shares outstanding including nonvested shares	48.7	[3]	49.5	[3]	48.9	[3]	49.6	[3]
Dilutive effect of convertible notes	0		1.2		0		0
Dilutive effect of stock options and restricted stock units	0		0.3		0		0
Weighted average shares outstanding for diluted EPS computation	48.7	[3]	51.0	[3]	48.9	[3]	49.6	[3]
Earnings per common share - assuming dilution	$ (0.51)		$ 0.16		$ (6.96)		$ (0.76)

[1] Outstanding unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities in undistributed earnings in the calculation above; however, the effect rounded to $0.0 million in the three and six months ended June 27, 2014.

[2] Numerator

[3] Denominator

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