Earnings 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								12 Months Ended
	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Earnings Per Share [Abstract]
Net income for basic EPS computation	$ 13.8	$ 5.7	$ 8.2	$ (45.8)	$ (15.7)	$ (22.9)	$ 17.7	$ 24.9	$ (18.1)		$ 4.0		$ 54.5
Less: Net income allocated to participating securities									0.1	[1]	0	[1]	0	[1]
Net income (loss) for basic EPS computations									(18.2)	[2]	4.0	[2]	54.5	[2]
Weighted average shares outstanding for basic EPS computation									49.4	[3],[4]	49.7	[3],[4]	51.9	[3],[4]
Earnings (losses) per common share - basic (usd per share)	$ 0.28	$ 0.11	$ 0.17	$ (0.92)	$ (0.32)	$ (0.46)	$ 0.36	$ 0.50	$ (0.37)	[4]	$ 0.08	[4]	$ 1.05	[4]
Net income attributable to Company common shareholders	13.8	5.7	8.2	(45.8)	(15.7)	(22.9)	17.7	24.9	(18.1)		4.0		54.5
Add: Preferred stock dividends on convertible stock									0		0.3		0.3
Net income attributable to Company common shareholders - for diluted EPS computation	$ 13.9	$ 5.8	$ 8.3	$ (45.8)	$ (15.7)	$ (22.8)	$ 17.8	$ 25.0	$ (18.1)	[2]	$ 4.3	[2]	$ 54.8	[2]
Weighted average shares outstanding including nonvested shares									49.4	[3],[4]	49.7	[3],[4]	51.9	[3],[4]
Dilutive effect of convertible notes									0		0		0.6
Dilutive effect of stock options and restricted stock units									0		1.0		0.8
Dilutive effect of assumed conversion of preferred stock									0		0.4		0.4
Weighted average shares outstanding for diluted EPS computation									49.4	[3]	51.1	[3]	53.7	[3]
Earnings (losses) per common share - assuming dilution (usd per share)	$ 0.27	$ 0.11	$ 0.16	$ (0.92)	$ (0.32)	$ (0.46)	$ 0.35	$ 0.49	$ (0.37)		$ 0.08		$ 1.02

[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.

[2] Numerator

[3] Denominator

[4] 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).