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Available-for-Sale Debt and Equity Investments - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jul. 30, 2022 | Jul. 31, 2021
Schedule of Investments [Line Items] |  |
Net unsettled investment sales | $ 70 |
Marketable equity securities | 241 | $ 137
Net unrealized gain (loss) on marketable securities | (38) | 8
Net gain on non-marketable equity securities measured using the measurement alternative | 32 | 39
Investments in privately held companies | 1,900 |
Funding commitments | 400 |
Variable Interest Entity, Not Primary Beneficiary |  |
Schedule of Investments [Line Items] |  |
Investments in privately held companies | 1,100 |
Net Asset Value (NAV) | Private equity funds |  |
Schedule of Investments [Line Items] |  |
Non-marketable equity securities included in other assets | $ 1,100 | $ 900

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