Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($)		Jun. 30, 2016		Dec. 31, 2015
Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Nominal volume	[1]	$ 94,200,000		$ 69,300,000
Derivatives Designated as Hedging Instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	[1]	3,700,000		200,000
Derivatives Designated as Hedging Instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	[1]	0		300,000
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Nominal volume		321,800,000		482,400,000
Not Designated as Hedging Instrument | Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset		1,300,000		2,500,000
Not Designated as Hedging Instrument | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		400,000		5,100,000
Less Than One Year | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Nominal volume	[1]	64,200,000		58,000,000
Less Than One Year | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other current assets | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative asset	[1]	2,100,000		200,000
Less Than One Year | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other current liabilities | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability	[1]	0		200,000
Less Than Two Years | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Nominal volume	[1]	30,000,000		11,300,000
Less Than Two Years | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other Non-Current Asset | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative asset	[1]	1,600,000		0
Less Than Two Years | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other Non-Current Liabilities | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability	[1]	0		100,000
Less Than Six Months | Not Designated as Hedging Instrument | Foreign Exchange Swaps
Derivatives, Fair Value [Line Items]
Nominal volume		321,800,000	[2]	482,400,000	[3]
Less Than Six Months | Not Designated as Hedging Instrument | Foreign Exchange Swaps | Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset		1,300,000	[4]	2,500,000	[5]
Less Than Six Months | Not Designated as Hedging Instrument | Foreign Exchange Swaps | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		$ 400,000	[6]	$ 5,100,000	[7]

[1] There is no netting since there are no offsetting contracts.

[2] Net nominal amount after deducting for offsetting swaps under ISDA agreements is $290.6 million.

[3] Net nominal amount after deducting for offsetting swaps under ISDA agreements is $435.8 million.

[4] Net amount after deducting for offsetting swaps under ISDA agreements is $1.3 million.

[5] Net amount after deducting for offsetting swaps under ISDA agreements is $2.4 million.

[6] Net amount after deducting for offsetting swaps under ISDA agreements is $0.3 million.

[7] Net amount after deducting for offsetting swaps under ISDA agreements is $4.9 million.