Cash Equivalents and Marketable Securities - Schedule of Unrealized Losses Aggregated by Investment Category (Details) - USD ($) $ in Millions |
Apr. 26, 2026 |
Jan. 25, 2026 |
|---|---|---|
| Estimated Fair Value | ||
| Less than 12 months | $ 16,187 | $ 13,132 |
| Gross Unrealized Loss | ||
| Less than 12 months | (17) | (6) |
| Debt securities issued by the U.S. Treasury | ||
| Estimated Fair Value | ||
| Less than 12 months | 12,238 | 10,666 |
| Gross Unrealized Loss | ||
| Less than 12 months | (8) | (3) |
| Corporate debt securities | ||
| Estimated Fair Value | ||
| Less than 12 months | 2,658 | 1,332 |
| Gross Unrealized Loss | ||
| Less than 12 months | (8) | (3) |
| Debt securities issued by U.S. government agencies | ||
| Estimated Fair Value | ||
| Less than 12 months | 1,291 | 1,134 |
| Gross Unrealized Loss | ||
| Less than 12 months | $ (1) | $ 0 |