Cash Equivalents and Marketable Securities - Schedule of Unrealized Losses Aggregated by Investment Category (Details) - USD ($) $ in Millions |
Oct. 26, 2025 |
Jan. 26, 2025 |
|---|---|---|
| Estimated Fair Value | ||
| Less than 12 Months | $ 2,197 | $ 12,422 |
| Gross Unrealized Loss | ||
| Less than 12 Months | (1) | (56) |
| Debt securities issued by the U.S. Treasury | ||
| Estimated Fair Value | ||
| Less than 12 Months | 1,223 | 6,315 |
| Gross Unrealized Loss | ||
| Less than 12 Months | 0 | (22) |
| Corporate debt securities | ||
| Estimated Fair Value | ||
| Less than 12 Months | 899 | 5,291 |
| Gross Unrealized Loss | ||
| Less than 12 Months | (1) | (29) |
| Debt securities issued by U.S. government agencies | ||
| Estimated Fair Value | ||
| Less than 12 Months | 75 | 816 |
| Gross Unrealized Loss | ||
| Less than 12 Months | $ 0 | $ (5) |