Location and Fair Value of Derivative Instruments Designated as Hedging Instruments (Detail) - Derivatives Designated as Hedging Instruments - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 11.6	$ 16.1
Fair value of derivative liability	19.2	6.6
Forward currency contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	2.7	1.9
Forward currency contracts | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0.6	0.0
Forward currency contracts | Accrued Expenses
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	7.3	6.6
Forward currency contracts | Other Long-term Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	1.4	0.0
Option currency contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	6.2	9.3
Option currency contracts | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0.7	0.0
Interest rate swap contract | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1.4	0.0
Interest rate swap contract | Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0.0	4.9
Interest rate swap contract | Accrued Expenses
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	$ 10.5	$ 0.0