Financial Instruments - Non-Marketable Equity Securities (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2024 |
Jan. 31, 2023 |
Jan. 31, 2022 |
|
| Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract] | |||
| Upward adjustments | $ 0 | $ 6 | $ 7 |
| Negative adjustments, including impairments | (28) | (9) | (17) |
| Net adjustments | (28) | $ (3) | $ (10) |
| Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount [Abstract] | |||
| Upward adjustments | 29 | ||
| Negative adjustments, including impairments | (114) | ||
| Net adjustments | $ (85) | ||
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cumulative loss from downward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cumulative impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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