Investments - Schedule of Non-Marketable Equity Investments (Details) - USD ($) $ in Millions |
Jan. 31, 2026 |
Jan. 31, 2025 |
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| Total initial cost | $ 205 | $ 217 |
| Cumulative net unrealized gains | 25 | 27 |
| Carrying value | $ 230 | $ 244 |