Investments - Cumulative Adjustments (Details) - USD ($) $ in Millions |
Apr. 25, 2026 |
Jul. 26, 2025 |
|---|---|---|
| Equity Securities without Readily Determinable Fair Value [Line Items] | ||
| Initial cost of non-marketable equity securities measured under the measurement alternative | $ 1,102 | $ 975 |
| Cumulative upward adjustments | 440 | 195 |
| Cumulative downward adjustments, including impairments | (602) | (597) |
| Non-marketable equity securities under measurement alternative | 940 | 573 |
| Total | 2,946 | 1,921 |
| Restricted equity securities | ||
| Equity Securities without Readily Determinable Fair Value [Line Items] | ||
| Total | 379 | 0 |
| Consolidated investments | ||
| Equity Securities without Readily Determinable Fair Value [Line Items] | ||
| Total | 702 | 508 |
| Non-marketable equity securities under net asset value (NAV), equity method and other | ||
| Equity Securities without Readily Determinable Fair Value [Line Items] | ||
| Total | $ 925 | $ 840 |