Income Taxes - Reconciliation of Potential Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Reconciliation of the beginning and ending amount of potential tax benefits | |||
| Beginning of year | $ 125 | $ 104 | $ 548 |
| Increases in prior year position | 21 | 4 | 41 |
| Increases in current year position | 17 | 17 | 13 |
| Decreases in prior year position | (20) | 0 | (474) |
| Settlements with taxing authorities | (63) | 0 | (24) |
| Lapse of statute of limitations | (9) | 0 | 0 |
| End of year | $ 71 | $ 125 | $ 104 |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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