Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended					9 Months Ended
	Sep. 26, 2019	Jun. 27, 2019	Sep. 27, 2018	Jun. 28, 2018	Mar. 29, 2018	Sep. 26, 2019	Sep. 27, 2018	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Treasury Stock, Shares, Acquired						0.8
Common Stock, Dividends, Per Share, Declared		$ 0.12		$ 0.12	$ 0.10
Stock Repurchased During Period, Value						$ 75.0
Basic EPS
Income available to common shareholders	$ 131.2		$ 168.7			$ 462.1	$ 439.1
Income available to common shareholders, shares	103.5		105.1			103.6	109.3
Income available to common shareholders, per share amount	$ 1.27		$ 1.61			$ 4.46	$ 4.02
Income allocated to participating securities	$ 0.1		$ 0.1			$ 0.3	$ 0.3
Income allocated to participating securities, shares	0.1		0.1			0.1	0.1
Net income	$ 131.3		$ 168.8			$ 462.4	$ 439.4
Diluted potential common shares	1.0		0.9			1.1	0.9
Diluted EPS
Net income	$ 131.3		$ 168.8			$ 462.4	$ 439.4
Shares	104.6		106.1			104.8	110.3
Diluted (in dollars per share)	$ 1.26		$ 1.59			$ 4.41	$ 3.98
Equity Textuals [Abstract]
Common shares outstanding issued but unvested	1.4					1.4
Noncontrolling interest	$ 0.5					$ 0.5		$ 0.5
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(188.1)					(188.1)		(196.6)
Pension [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(90.7)					(90.7)		(116.7)
SERP and Retiree medical [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	19.0					19.0		17.2
Foreign currency impact on long term intercompany loan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(18.6)					(18.6)		(17.4)
Currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (96.3)					$ (96.3)		$ (79.7)