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	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	$ 0.7		$ (1.4)		$ 0.9
Gain/(Loss) Reclassified from Accumulated Other Comp. Loss into Income	1.0	[1]	1.0	[1]	0.8	[1]
Forward currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	3.5		(3.9)		0.1
Forward currency contracts | Costs Of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comp. Loss into Income	(0.9)	[1]	1.0	[1]	0.4	[1]
Option currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Other Comprehensive Income (Loss)	(2.8)		2.5		0.8
Option currency contracts | Costs Of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Reclassified from Accumulated Other Comp. Loss into Income	$ 1.9	[1]			$ 0.4	[1]

[1] The tax effect of the amount reclassified from accumulated other comprehensive loss to income was $0.1 million, $1.0 million and $0.1 million at December 31, 2012, 2011 and 2010, respectively.