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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total net derivative liability designated as hedging instruments $ (1.5) $ (20.5)
Foreign Exchange Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Total net derivative liability designated as hedging instruments 2.3 (6.5)
Foreign Exchange Forward Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 3.0  
Derivative liabilities (0.7) (6.5)
Interest Rate Hedge [Member] | Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 3.7  
Derivative liabilities $ (7.5) $ (14.0)