Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Unrecognized Tax Benefits [Roll Forward] | |||
| Beginning gross unrecognized tax benefits | $ 821.2 | $ 792.4 | $ 848.0 |
| Decreases related to settlements with tax authorities | (62.6) | (0.7) | (5.8) |
| Decreases related to statute of limitation expirations | (8.2) | (6.9) | (3.3) |
| Increases related to current year tax positions | 16.4 | 27.1 | 37.4 |
| Increases related to prior year tax positions | 9.3 | ||
| (Decreases) related to prior year tax positions | (87.0) | (83.9) | |
| Ending gross unrecognized tax benefits | $ 679.8 | $ 821.2 | $ 792.4 |
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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 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 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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