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Fair Value Measurements - Schedule of Long-Term Debt is Recorded at Amortized Cost (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value $ 5,584 $ 5,594
Fair Value, Recurring | Fair value, inputs, level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value 5,584 5,594
Fair Value $ 5,268 $ 5,386