Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 26, 2013	Jun. 27, 2013	Mar. 28, 2013	Dec. 31, 2012	Sep. 27, 2012	Jun. 28, 2012	Mar. 29, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic EPS
(Loss) income available to common shareholders									$ (621.4)	$ 34.4	$ 189.2
(Loss) income available to common shareholders (in shares)									141,300,000	140,700,000	139,200,000
(Loss) earnings per share, basic (in dollars per share)	$ (4.15)	$ 0.66	$ (1.48)	$ 0.57	$ 0.43	$ (0.96)	$ 0.25	$ 0.52	$ (4.40)	$ 0.24	$ 1.36
Income allocated to participating securities									0	0.4	3.2
Income allocated to participating securities, shares									0	1,500,000	2,300,000
Net (loss) income	(586.9)	93.7	(209.4)	81.2	60.7	(134.4)	34.9	73.6	(621.4)	34.8	192.4
Diluted potential common shares (in shares)									0	500,000	800,000
Diluted EPS
Net (loss) income	(586.9)	93.7	(209.4)	81.2	60.7	(134.4)	34.9	73.6	(621.4)	34.8	192.4
Shares									141,300,000	142,700,000	142,300,000
(Loss) earnings per share, diluted (in dollars per share)	$ (4.15)	$ 0.65	$ (1.48)	$ 0.57	$ 0.43	$ (0.96)	$ 0.24	$ 0.52	$ (4.40)	$ 0.24	$ 1.35
Common Stock, Shares, Outstanding	144,800,000				143,700,000				144,800,000	143,700,000	142,900,000
Issued But Unvested Shares (in shares)	3,400,000				2,700,000				3,400,000	2,700,000	2,600,000
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)									1,000,000
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss)	(54.6)				(145.2)				(54.6)	(145.2)
Noncontrolling interest	0.5				0.5				0.5	0.5
Accumulated Defined Benefit Plans Adjustment [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss)	(52.7)				(132.0)				(52.7)	(132.0)
Accumulated SERP And Retiree Medical [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss)	3.1				(2.6)				3.1	(2.6)
Foreign Currency Impact On Long Term Intercompany Loan [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss)	(2.2)				(3.5)				(2.2)	(3.5)
Accumulated Translation Adjustment [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss)	$ (2.8)				$ (7.1)				$ (2.8)	$ (7.1)