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. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Amortization of pension items [Abstract]
Pre-tax amount	$ 7.0	$ 2.2	$ 9.7	$ 4.4
Tax	(1.7)	(0.5)	(2.3)	(1.1)
Net of tax	$ 5.3	$ 1.7	$ 7.4	$ 3.3