Comprehensive Income (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Income tax expense (benefit) allocated to other comprehensive income (loss)
Pension and other postretirement benefits	$ 4.5	$ 2.7	$ 5.7	$ 3.9
Cash flow hedges	0.2	(0.1)	(0.1)	(0.1)
Income tax expense related to components of other comprehensive income (loss)	$ 4.7	$ 2.6	$ 5.6	$ 3.8