Location and Amounts of Gains and Losses on Derivative Instruments Designated as Cash Flow Hedges (Detail) - Cash flow hedges - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	$ (3.8)	$ (18.9)	$ (33.9)	$ (8.1)
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(2.5)	2.9	(6.6)	8.0
Forward currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	(3.5)	(3.6)	(15.3)	(5.4)
Forward currency contracts | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(1.2)	(1.6)	(5.9)	(1.0)
Option currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	(0.3)	(2.4)	(3.3)	8.0
Option currency contracts | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(0.8)	4.5	0.2	9.0
Interest rate swap contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	0.0	(12.9)	(15.3)	(10.7)
Interest rate swap contract | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	$ (0.5)	$ 0.0	$ (0.9)	$ 0.0