Comprehensive Income, Reclassification Out of Accumulated Other Comprehensive Loss (Details) - Pension Costs [Member] - Reclassification out of Accumulated Other Comprehensive Loss [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Amortization of pension items [Abstract]
Pre-tax amount	$ 2.2	$ 2.4	$ 4.4	$ 4.9
Tax	(0.5)	(0.5)	(1.1)	(1.2)
Net of tax	$ 1.7	$ 1.9	$ 3.3	$ 3.7