Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			$ (542.3)	$ (281.2)
Other comprehensive loss before reclassifications, net of tax			(128.6)	(81.6)
Reclassifications to net income, net of tax			15.8	13.2
Net current-period other comprehensive (loss) income, net of tax	$ (55.7)	$ (74.0)	(112.8)	(68.4)
Balance at end of the period	(655.1)	(349.6)	(655.1)	(349.6)
Foreign Currency Translation
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			(16.7)	137.1
Other comprehensive loss before reclassifications, net of tax			(129.7)	(82.6)
Net current-period other comprehensive (loss) income, net of tax			(129.7)	(82.6)
Balance at end of the period	(146.4)	54.5	(146.4)	54.5
Pension and Other Postretirement Benefits
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			(525.6)	(417.3)
Other comprehensive loss before reclassifications, net of tax			0.5	2.2
Reclassifications to net income, net of tax			17.2	12.1
Net current-period other comprehensive (loss) income, net of tax			17.7	14.3
Balance at end of the period	(507.9)	(403.0)	(507.9)	(403.0)
Cash Flow Hedges
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period				(1.0)
Other comprehensive loss before reclassifications, net of tax			0.6	(1.2)
Reclassifications to net income, net of tax			(1.4)	1.1
Net current-period other comprehensive (loss) income, net of tax			(0.8)	(0.1)
Balance at end of the period	$ (0.8)	$ (1.1)	$ (0.8)	$ (1.1)