Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2024 |
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| Reconciliation of Unrecognized Tax Benefits [Roll Forward] | |||
| Unrecognized tax benefits at beginning of year | $ 13 | $ 14 | $ 21 |
| Additions for tax positions provided in prior periods | 0 | 0 | 1 |
| Additions for tax positions provided in current period | 1 | 2 | 2 |
| Decreases for tax positions provided in prior years | (2) | 0 | (3) |
| Settlements of tax positions in the current period | 0 | 0 | (3) |
| Lapse of statutes of limitations | (1) | (3) | (4) |
| Unrecognized tax benefits at end of year | 11 | $ 13 | $ 14 |
| Unrecognized Tax Benefits [Abstract] | |||
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 8 | ||
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- Definition Unrecognized Tax Benefits [Abstract] No definition available.
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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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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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