Accumulated Other Comprehensive Income - Changes in AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014
Accumulated other comprehensive income (loss):
Balance - beginning of period	$ (1,270.2)	$ (499.0)
Other comprehensive (loss) income before reclassifications	(259.0)	1.0
Reclassification adjustments to earnings	1.7	3.8
Net other comprehensive (loss) income	(257.3)	4.8
Balance - end of period	(1,527.5)	(494.2)
Currency translation adjustment and other
Accumulated other comprehensive income (loss):
Balance - beginning of period	(796.8)	(70.5)
Other comprehensive (loss) income before reclassifications	(314.2)	7.6
Reclassification adjustments to earnings	0	0
Net other comprehensive (loss) income	(314.2)	7.6
Balance - end of period	(1,111.0)	(62.9)
Unrealized (losses) gains on cash flow hedges, net of tax
Accumulated other comprehensive income (loss):
Balance - beginning of period	(50.9)	(77.3)
Other comprehensive (loss) income before reclassifications	21.2	(1.5)
Reclassification adjustments to earnings	(1.1)	2.3
Net other comprehensive (loss) income	20.1	0.8
Balance - end of period	(30.8)	(76.5)
Unrealized (losses) gains on net investment hedges, net of tax
Accumulated other comprehensive income (loss):
Balance - beginning of period	(37.2)	(76.8)
Other comprehensive (loss) income before reclassifications	22.9	(6.7)
Reclassification adjustments to earnings	0	0
Net other comprehensive (loss) income	22.9	(6.7)
Balance - end of period	(14.3)	(83.5)
Pension (losses) gains, net of tax
Accumulated other comprehensive income (loss):
Balance - beginning of period	(385.3)	(274.4)
Other comprehensive (loss) income before reclassifications	11.1	1.6
Reclassification adjustments to earnings	2.8	1.5
Net other comprehensive (loss) income	13.9	3.1
Balance - end of period	$ (371.4)	$ (271.3)