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Financing Arrangement - Schedule Of Interest Expense Related To Notes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Debt Disclosure [Abstract]        
Amortization of debt issuance costs $ 0 $ 0 $ (1) $ (1)
Coupon interest expense (14) (14) (28) (28)
Total interest expense $ (14) $ (14) $ (29) $ (29)