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
Mar. 31, 2019	Apr. 01, 2018
Amortization of pension items [Abstract]
Pre-tax amount	$ 2.2	$ 2.4
Tax	(0.6)	(0.5)
Net of tax	$ 1.6	$ 1.9

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

Mar. 31, 2019

Apr. 01, 2018

Amortization of pension items [Abstract]

Pre-tax amount

$ 2.2

$ 2.4

Tax

(0.6)

(0.5)

Net of tax

$ 1.6

$ 1.9