Income Taxes - Unrecognized Tax Benefits Reconciliation (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2024 |
Jan. 31, 2023 |
Jan. 31, 2022 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Gross unrecognized tax benefits at the beginning of the fiscal year | $ 238 | $ 217 | $ 198 |
| Increases for tax positions of prior years | 23 | 9 | 9 |
| Decreases for tax positions of prior years | (11) | (3) | 0 |
| Increases for tax positions related to the current year | 13 | 21 | 10 |
| Decreases relating to settlements with taxing authorities | 0 | (5) | 0 |
| Reductions as a result of lapse of the statute of limitations | (2) | (1) | 0 |
| Gross unrecognized tax benefits at the end of the fiscal year | $ 261 | 238 | 217 |
| Increase of unrecognized tax benefits related to transfer pricing matters | $ 15 | $ 10 | |