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Hedging Activities - Schedule of Fair Value of Derivatives (Details) - Derivatives designated for hedge accounting - USD ($) $ in Millions | Sep. 30, 2023 | Mar. 31, 2023
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Fair value of derivative, asset | $ 79 | $ 80
Fair value of derivative, liability | 52 | 17
Net Investment Hedges | Prepaid expenses and other |  |
Derivatives, Fair Value [Line Items] |  |
Fair value of derivative, asset | 6 | 5
Fair value of derivative, liability | 0 | 0
U.S. Dollar notional amount, asset | 301 | 301
Net Investment Hedges | Other non-current assets/liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Fair value of derivative, asset | 73 | 74
Fair value of derivative, liability | 1 | 2
U.S. Dollar notional amount, asset | 2,760 | 2,760
Floating interest rate swaps | Other non-current assets/liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Fair value of derivative, asset | 0 | 1
Fair value of derivative, liability | 51 | 15
U.S. Dollar, notional amount, liability | $ 1,250 | $ 1,700

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