Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period	$ (547.3)	$ (281.1)
Other comprehensive loss before reclassifications, net of tax	(72.1)	(0.9)
Reclassifications to net income, net of tax	5.7	4.2
Other comprehensive (loss) income, net of tax	(66.4)	3.3
Balance at end of the period	(613.7)	(277.8)
Cash Flow Hedges
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period		(1.0)
Reclassifications to net income, net of tax	(0.7)	(0.1)
Other comprehensive (loss) income, net of tax	(0.7)	(0.1)
Balance at end of the period	(0.7)	(1.1)
Pension and Other Postretirement Benefits
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period	(530.6)	(418.1)
Reclassifications to net income, net of tax	6.4	4.3
Other comprehensive (loss) income, net of tax	6.4	4.3
Balance at end of the period	(524.2)	(413.8)
Foreign Currency Translation
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period	(16.7)	138.0
Other comprehensive loss before reclassifications, net of tax	(72.1)	(0.9)
Other comprehensive (loss) income, net of tax	(72.1)	(0.9)
Balance at end of the period	$ (88.8)	$ 137.1