Location and Fair Value of Derivative Instruments Designated as Hedging Instruments (Detail) (Derivatives Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 15.8	$ 15.3
Fair value of derivative liability	0.3	0.4
Forward currency contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	3.4	1.4
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	0.1	0.4
Forward currency contracts | Other Long-term Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	0.2	0
Option currency contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1.5	0.6
Option currency contracts | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0.6	0
Interest rate swap contract | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 10.1	$ 13.3