Investments - Schedule of Non-Marketable Equity Investments (Details) - USD ($) $ in Millions |
Apr. 30, 2026 |
Jan. 31, 2026 |
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| Total initial cost | $ 198 | $ 205 |
| Cumulative net unrealized gains | 22 | 25 |
| Carrying value | $ 220 | $ 230 |