Income Taxes - Summary of Reconciliation of Gross Unrecognized Tax Benefit (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2026 |
Jan. 31, 2025 |
Jan. 31, 2024 |
|
| Unrecognized Tax Benefits [Roll Forward] | |||
| Unrecognized tax benefits at the beginning of the period | $ 309 | $ 253 | $ 196 |
| Additions for tax positions taken in prior years | 3 | 15 | 30 |
| Additions for tax positions related to the current year | 30 | 41 | 27 |
| Reductions related to a lapse of applicable statute of limitations | (1) | 0 | 0 |
| Unrecognized tax benefits at the end of the period | $ 341 | $ 309 | $ 253 |
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|