Taxes - Reconciliation of Unrecognized Tax Benefits from Continuing Operations (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2026 |
Jan. 31, 2025 |
Jan. 31, 2024 |
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| Reconciliation of Unrecognized Tax Benefits | |||
| Gross unrecognized tax benefits, beginning of year | $ 3,757 | $ 3,540 | $ 3,307 |
| Increases related to prior year tax positions | 342 | 445 | 336 |
| Decreases related to prior year tax positions | (1,360) | (228) | (74) |
| Increases related to current year tax positions | 94 | 93 | 102 |
| Settlements during the period | (328) | (77) | (102) |
| Lapse in statutes of limitations | (65) | (16) | (29) |
| Gross unrecognized tax benefits, end of year | $ 2,440 | $ 3,757 | $ 3,540 |
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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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