Accumulated Other Comprehensive Income - Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Accumulated other comprehensive income (loss):
Balance - beginning of period	$ (1,694.2)	$ (1,270.2)
Other comprehensive income (loss) before reclassifications	86.3	(259.0)
Reclassification adjustments to earnings	(6.5)	1.7
Net other comprehensive income (loss)	79.8	(257.3)
Balance - end of period	(1,614.4)	(1,527.5)
Currency translation adjustment and other
Accumulated other comprehensive income (loss):
Balance - beginning of period	(1,300.9)	(796.8)
Other comprehensive income (loss) before reclassifications	128.0	(314.2)
Reclassification adjustments to earnings	0.0	0.0
Net other comprehensive income (loss)	128.0	(314.2)
Balance - end of period	(1,172.9)	(1,111.0)
Unrealized losses on cash flow hedges, net of tax
Accumulated other comprehensive income (loss):
Balance - beginning of period	(52.1)	(50.9)
Other comprehensive income (loss) before reclassifications	(43.8)	21.2
Reclassification adjustments to earnings	(9.3)	(1.1)
Net other comprehensive income (loss)	(53.1)	20.1
Balance - end of period	(105.2)	(30.8)
Unrealized gains on net investment hedges, net of tax
Accumulated other comprehensive income (loss):
Balance - beginning of period	11.8	(37.2)
Other comprehensive income (loss) before reclassifications	1.6	22.9
Reclassification adjustments to earnings	0.0	0.0
Net other comprehensive income (loss)	1.6	22.9
Balance - end of period	13.4	(14.3)
Pension (losses) gains, net of tax
Accumulated other comprehensive income (loss):
Balance - beginning of period	(353.0)	(385.3)
Other comprehensive income (loss) before reclassifications	0.5	11.1
Reclassification adjustments to earnings	2.8	2.8
Net other comprehensive income (loss)	3.3	13.9
Balance - end of period	$ (349.7)	$ (371.4)