Comprehensive Income, Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Details) - Pension Costs [Member] - Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax amount	$ 1.8	$ 1.9	$ 3.7	$ 3.9
Tax	(0.5)	(0.6)	(1.2)	(1.3)
Net of tax	$ 1.3	$ 1.3	$ 2.5	$ 2.6