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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Mar. 31, 2025
Tax Credit Carryforward [Line Items] |  |  |
Effective income tax rate (as a percent) | (25.50%) | 22.90% |
Reduction of uncertain tax positions | $ 89 |  |
Increase (decrease) in income tax reserves | (86) |  |
Accrual of interest on long term receivable | 20 |  |
Long-term income tax receivable | 172 |  | $ 152
Research and Development Tax Credits |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Income tax reserves | $ 53 |  | $ 142

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