Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2024 |
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| Unrecognized Tax Benefits [Roll Forward] | |||
| Balance at beginning of year | $ 5 | $ 5 | $ 5 |
| Gross increases related to prior period positions | 0 | 0 | 0 |
| Gross decreases related to prior period positions | 0 | 0 | 0 |
| Gross decreases related to expiration of statute of limitations | (2) | 0 | 0 |
| Foreign exchange | 0 | 0 | 0 |
| Balance at end of year | $ 3 | $ 5 | $ 5 |
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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 increase in unrecognized tax benefits resulting from foreign currency translation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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