Shareholders' Equity - Schedule of Fair Value of Restricted Stock (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2026 |
Jan. 31, 2025 |
Jan. 31, 2024 |
|
| Restricted Stock Units | |||
| Additional information related to restricted stock and performance share awards and restricted stock units | |||
| Fair value | $ 2,111 | $ 1,848 | $ 1,345 |
| Unrecognized compensation cost | $ 2,239 | $ 2,243 | $ 1,686 |
| Weighted average remaining period to expense, (years) | 9 months 18 days | 10 months 24 days | 10 months 24 days |
| Restricted stock and performance-based restricted stock units | |||
| Additional information related to restricted stock and performance share awards and restricted stock units | |||
| Fair value | $ 652 | $ 602 | $ 477 |
| Unrecognized compensation cost | $ 670 | $ 669 | $ 656 |
| Weighted average remaining period to expense, (years) | 1 year 3 months 18 days | 1 year 3 months 18 days | 1 year 3 months 18 days |