Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			$ (547.3)	$ (281.1)
Other comprehensive (loss) income before reclassifications, net of tax			(68.8)	(6.6)
Reclassifications to net income, net of tax			12.7	9.1
Other comprehensive income (loss), net of tax	$ 10.3	$ (0.8)	(56.1)	2.5
Balance at end of the period	(603.4)	(278.6)	(603.4)	(278.6)
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) income before reclassifications, net of tax			(69.1)	(4.0)
Other comprehensive income (loss), net of tax			(69.1)	(4.0)
Balance at end of the period	(85.8)	134.0	(85.8)	134.0
Pension and Other Postretirement Benefits
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			(530.6)	(418.1)
Other comprehensive (loss) income before reclassifications, net of tax			0.5	(1.0)
Reclassifications to net income, net of tax			13.1	8.0
Other comprehensive income (loss), net of tax			13.6	7.0
Balance at end of the period	(517.0)	(411.1)	(517.0)	(411.1)
Cash Flow Hedges
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period				(1.0)
Other comprehensive (loss) income before reclassifications, net of tax			(0.2)	(1.6)
Reclassifications to net income, net of tax			(0.4)	1.1
Other comprehensive income (loss), net of tax			(0.6)	(0.5)
Balance at end of the period	$ (0.6)	$ (1.5)	$ (0.6)	$ (1.5)