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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. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Amortization of pension items [Abstract]
Pre-tax amount	$ 6.2	$ 1.7	$ 11.1	$ 5.5
Tax	(1.6)	(0.7)	(2.7)	(1.8)
Net of tax	$ 4.6	$ 1.0	$ 8.4	$ 3.7

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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