Investments - Gross Realized Gains and Gross Realized Losses Related to Available-for-Sale Investment (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Apr. 25, 2026 |
Apr. 26, 2025 |
Apr. 25, 2026 |
Apr. 26, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | ||||
| Gross realized gains | $ 3 | $ 1 | $ 14 | $ 9 |
| Gross realized losses | (3) | (31) | (22) | (84) |
| Total | $ 0 | $ (30) | $ (8) | $ (75) |