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Schedule of Notional Amount of Derivatives (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts $ 56.3 $ 20.5
Buy Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (48.3) (62.2)
Sell Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 104.6 82.7
Japanese Yen    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (14.1) (29.3)
Japanese Yen | Buy Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (14.1) (29.3)
Taiwan Dollar    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (27.9) (18.4)
Taiwan Dollar | Buy Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (27.9) (18.4)
Korean Won    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (5.3) (10.7)
Korean Won | Buy Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (5.3) (10.7)
British Pound Sterling    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (1.0) (3.8)
British Pound Sterling | Buy Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Liability, Notional amounts (1.0) (3.8)
Euro    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 43.9 47.8
Euro | Sell Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 43.9 47.8
Singapore Dollar    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 52.3 25.3
Singapore Dollar | Sell Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 52.3 25.3
Philippines, Pesos    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 5.0 5.2
Philippines, Pesos | Sell Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 5.0 5.2
China, Yuan Renminbi    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts 3.4 4.4
China, Yuan Renminbi | Sell Position    
Intercompany Foreign Currency Balance [Line Items]    
Derivative Asset, Notional amounts $ 3.4 $ 4.4