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Available-for-Sale Debt and Equity Investments - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Oct. 30, 2021 | Jul. 31, 2021
Schedule of Investments [Line Items] |  |
Net unrealized gains on marketable securities | $ 5 |
Net loss (gain) on non-marketable equity securities measured using the measurement alternative | (2) |
Investments in privately held companies | 1,700 | $ 1,500
Funding commitments | 200 |
Variable Interest Entity, Not Primary Beneficiary |  |
Schedule of Investments [Line Items] |  |
Investments in privately held companies | 1,000 |
Private equity funds | Fair value measured at NAV per share |  |
Schedule of Investments [Line Items] |  |
Equity interests held in certain private equity funds | $ 1,000 | $ 900

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