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Derivative Instruments - Narrative (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2022
USD ($)
counterparty
Mar. 31, 2022
USD ($)
Derivative [Line Items]      
Foreign currency cash flow hedge gain to be reclassified during next 12 months $ 17 $ 17  
Number of counterparties with concentration of credit risk | counterparty   10  
Maximum exposure to loss   $ 38  
Designated as Hedging Instrument      
Derivative [Line Items]      
Pretax gain (loss) on derivatives designated for hedge accounting included other comprehensive income (7) (10)  
Pretax gain (loss) on derivative instruments 5 9  
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Currency Forward Contracts      
Derivative [Line Items]      
Notational amount of derivative 801 801 $ 727
Designated as Hedging Instrument | Net Investment Hedging | Foreign Currency Denominated Debt      
Derivative [Line Items]      
Notational amount of derivative 200 200 300
Pretax gain (loss) on derivatives designated for hedge accounting included other comprehensive income 17 33  
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts      
Derivative [Line Items]      
Notational amount of derivative $ 1,900 $ 1,900 $ 2,100