Location and Amounts of Gains and Losses on Derivative Instruments Designated as Cash Flow Hedges (Detail) (Cash flow hedges, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income	$ 0.1	$ (4.1)	$ 2.1		$ (4.1)
Gain/(Loss) Reclassified from Accumulated Other Comp. Loss into Income	0.2	(0.1)	0.9	[1]	0.8	[1]
Forward currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income	1.2	(4.3)	3.3		(4.2)
Forward currency contracts | Costs Of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comp. Loss into Income	(0.3)	(0.1)	(0.2)		0.8
Option currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income	(1.1)	0.2	(1.2)		0.1
Option currency contracts | Costs Of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comp. Loss into Income	$ 0.5		$ 1.1

[1] The tax effect of the amount reclassified from accumulated other comprehensive loss to income was $0.2 million and $0.7 million at September 30, 2012 and 2011, respectively.