Location and Fair Value of Derivative Instruments Designated as Hedging Instruments (Detail) (Derivatives Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 12.2	$ 11.4
Fair value of derivative liability	1.7	0.5
Forward currency contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0.8	1.2
Forward currency contracts | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0.2	0
Forward currency contracts | Accrued Expenses
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	1.3	0.5
Forward currency contracts | Other Long-term Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	0.4	0
Option currency contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	4.3	1.3
Option currency contracts | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1.2	0
Interest rate swap contract | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 5.7	$ 8.9