Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Derivative Instruments and Hedging Activities - Gains Relating to Derivative Instruments Not Designated As Hedging Instruments Recorded to Income (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
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 Gain Recognized in Income $ 4.2 $ 0.4 $ 5.9 $ 0.2