Derivative Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Not Designated as Hedging Instrument - Fair Value, Measurements, Recurring - USD ($)	Jun. 30, 2020		Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Nominal volume	$ 650,100,000		$ 934,200,000
Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset (Other current assets)	5,200,000		6,000,000.0
Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability (Other current liabilities)	2,600,000		1,800,000
Less Than Six Months | Foreign Exchange Swaps
Derivatives, Fair Value [Line Items]
Nominal volume	650,100,000	[1]	934,200,000	[2]
Less Than Six Months | Other current assets | Foreign Exchange Swaps
Derivatives, Fair Value [Line Items]
Derivative asset (Other current assets)	5,200,000	[3]	6,000,000.0	[4]
Less Than Six Months | Other current liabilities | Foreign Exchange Swaps
Derivatives, Fair Value [Line Items]
Derivative liability (Other current liabilities)	$ 2,600,000	[5]	$ 1,800,000	[6]

[1] Net nominal amount after deducting for offsetting swaps under ISDA agreements is $626.0 million.

[2] Net nominal amount after deducting for offsetting swaps under ISDA agreements is $860.6 million.

[3] Net amount after deducting for offsetting swaps under ISDA agreements is $5.2 million.

[4] Net amount after deducting for offsetting swaps under ISDA agreements is $5.8 million.

[5] Net amount after deducting for offsetting swaps under ISDA agreements is $2.6 million.

[6] Net amount after deducting for offsetting swaps under ISDA agreements is $1.6 million.