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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	$ (18.9)	$ 0.2	$ (8.1)	$ 1.1
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	2.9	(0.5)	8.0	(0.7)
Forward currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	(3.6)	(1.7)	(5.4)	(0.8)
Forward currency contracts | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(1.6)	0.1	(1.0)	0.9
Option currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	(2.4)	1.9	8.0	1.9
Option currency contracts | Cost of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	4.5	(0.6)	9.0	(1.6)
Interest rate swap contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	(12.9)	0.0	(10.7)	0.0
Interest rate swap contract | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	$ 0.0	$ 0.0	$ 0.0	$ 0.0