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		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Amortization of pension items [Abstract]
Pre-tax amount	$ 5.1	$ 2.2	$ 14.8	$ 6.6
Tax	(1.4)	(0.6)	(3.7)	(1.7)
Net of tax	$ 3.7	$ 1.6	$ 11.1	$ 4.9