Fair Value Measurements and Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current	$ 1.6	$ 0.9
Noncurrent	254.1	256.8
Currency forward contracts	(2.0)	1.8
Quoted Prices in Active Markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current
Noncurrent	1.9	3.5
Currency forward contracts	(2.0)	1.8
Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current	1.6	0.9
Noncurrent	2.2	3.3
Currency forward contracts
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current
Noncurrent	250.0	250.0
Currency forward contracts