Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities - Gains (Losses) Relating to Derivative Instruments Not Designated As Hedging Instruments Recorded to Income (Detail)

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Derivative Instruments and Hedging Activities - Gains (Losses) Relating to Derivative Instruments Not Designated As Hedging Instruments Recorded to Income (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Foreign exchange currency contracts [Member] | Derivatives not designated as hedging instruments [Member] | Selling, general and administrative expenses [Member]      
Derivative Instruments Gain Loss [Line Items]      
Amount of (Loss) Gain Recognized in Income $ 2.5 $ 1.0 $ (4.0)