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
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Amortization of pension items [Abstract]
Pre-tax amount	$ 5.7	$ 7.0	$ 9.0	$ 9.7
Tax	(1.4)	(1.7)	(2.2)	(2.3)
Net of tax	$ 4.3	$ 5.3	$ 6.8	$ 7.4