Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2018	Jun. 29, 2017	Jun. 28, 2018	Jun. 29, 2017	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.12	$ 0.10	$ 0.22	$ 0.20
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (144.4)		$ (144.4)		$ (128.5)
Basic EPS
Income available to common shareholders	$ 145.1	$ (56.8)	$ 270.4	$ 84.8
Income available to common shareholders, shares	110.0	118.2	111.4	118.8
Income available to common shareholders, per share amount	$ 1.32	$ (0.48)	$ 2.43	$ 0.71
Income allocated to participating securities	$ 0.1	$ 0.0	$ 0.2	$ 0.1
Income allocated to participating securities, shares	0.1	0.0	0.1	0.1
Net income (loss)	$ 145.2	$ (56.8)	$ 270.6	$ 84.9
Diluted potential common shares	0.9	0.0	1.1	0.0
Diluted EPS
Net income (loss)	$ 145.2	$ (56.8)	$ 270.6	$ 84.9
Shares	111.0	118.2	112.6	118.9
Diluted (in dollars per share)	$ 1.31	$ (0.48)	$ 2.40	$ 0.71
Equity Textuals [Abstract]
Common shares outstanding issued but unvested	1.4	1.5	1.4	1.5
Noncontrolling interest	$ 0.5		$ 0.5		0.5
Pension [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(75.9)		(75.9)		(75.9)
SERP and Retiree medical [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	16.5		16.5		17.7
Foreign currency impact on long term intercompany loan [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(15.5)		(15.5)		(14.2)
Currency translation adjustment [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (69.5)		(69.5)		$ (56.1)
Accelerated Share Repurchase Program [Member]
Derivatives, Fair Value [Line Items]
Treasury Stock, Value, Acquired, Cost Method			$ 725.0