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
Apr. 04, 2021	Mar. 29, 2020
Amortization of pension items [Abstract]
Pre-tax amount	$ 3.3	$ 2.7
Tax	(0.8)	(0.6)
Net of tax	$ 2.5	$ 2.1

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

Apr. 04, 2021

Mar. 29, 2020

Amortization of pension items [Abstract]

Pre-tax amount

$ 3.3

$ 2.7

Tax

(0.8)

(0.6)

Net of tax

$ 2.5

$ 2.1