Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2021	Oct. 01, 2020	Jul. 01, 2021	Jul. 02, 2020	Sep. 30, 2021	Oct. 01, 2020	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 925.0				$ 925.0
Common Stock, Dividends, Per Share, Declared	$ 0.01				$ 0.03
Basic EPS
Income available to common shareholders	$ (113.6)	$ (155.5)			$ (420.5)	$ (574.4)
Income available to common shareholders, shares	104,300,000	103,900,000			104,200,000	103,800,000
Income available to common shareholders, per share amount	$ (1.09)	$ (1.50)			$ (4.04)	$ (5.53)
Income allocated to participating securities, shares	0	0			0	0
Net Income (Loss) Attributable to Parent	$ (113.6)	$ (155.5)	$ (306.9)	$ (418.9)	$ (420.5)	$ (574.4)
Diluted potential common shares	0	0			0	0
Diluted EPS
Net Income (Loss) Attributable to Parent	$ (113.6)	$ (155.5)	$ (306.9)	$ (418.9)	$ (420.5)	$ (574.4)
Shares	104,300,000	103,900,000			104,200,000	103,800,000
Diluted (in dollars per share)	$ (1.09)	$ (1.50)			$ (4.04)	$ (5.53)
Equity Textuals [Abstract]
Noncontrolling interest	$ 0.5				$ 0.5		$ 0.5
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(163.3)				(163.3)		(154.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	$ 0.4	$ 0.7			$ 1.6	$ 2.0
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	400,000	900,000			500,000	700,000
Earnings Per Share, Potentially Dilutive Securities		0.3				0.3
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	$ 0.0	$ 0.0			$ 0.0	$ 0.0
Pension [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(107.0)				(107.0)		(112.0)
Accumulated Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	0.0				0.0		(0.9)
SERP and Retiree medical [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	13.2				13.2		14.5
Foreign currency impact on long term intercompany loan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(12.4)				(12.4)		(11.8)
Currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(51.5)				(51.5)		(43.9)
Accumulated Foreign Exchange Forward [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (5.6)				$ (5.6)		$ 0.0