Cash Equivalents and Marketable Securities - Schedule of Unrealized Losses Aggregated by Investment Category (Details) - USD ($) $ in Millions |
Jul. 27, 2025 |
Jan. 26, 2025 |
|---|---|---|
| Estimated Fair Value | ||
| Less than 12 Months | $ 11,626 | $ 12,422 |
| Gross Unrealized Loss | ||
| Less than 12 Months | (22) | (56) |
| Debt securities issued by the U.S. Treasury | ||
| Estimated Fair Value | ||
| Less than 12 Months | 7,319 | 6,315 |
| Gross Unrealized Loss | ||
| Less than 12 Months | (11) | (22) |
| Corporate debt securities | ||
| Estimated Fair Value | ||
| Less than 12 Months | 3,539 | 5,291 |
| Gross Unrealized Loss | ||
| Less than 12 Months | (9) | (29) |
| Debt securities issued by U.S. government agencies | ||
| Estimated Fair Value | ||
| Less than 12 Months | 768 | 816 |
| Gross Unrealized Loss | ||
| Less than 12 Months | $ (2) | $ (5) |