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Financial Instruments - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2019
Foreign exchange forward contracts | Cash flow hedge | Designated as hedging instrument        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Aggregate notional amount   $ 71,000,000 $ 65,000,000  
Foreign currency option contracts, purchase risk        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Aggregate notional amount   25,000,000 39,000,000  
Foreign currency option contracts, translation risk        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Aggregate notional amount   $ 10,000,000 $ 24,000,000  
Cross-currency swaps | Net investment hedge | Designated as hedging instrument        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Aggregate notional amount       $ 225,000,000
Proceeds from settlement of swap contracts $ 11,000,000      
Component of proceeds that was previously in net accrued interest receivable $ 1,000,000