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Available-for-Sale Debt and Equity Investments - Maturities of Available-for-Sale Debt Investments (Details) - USD ($) $ in Millions | Oct. 29, 2022 | Jul. 30, 2022
--- | --- | ---
Amortized Cost |  |
Within 1 year | $ 4,483 |
After 1 year through 5 years | 6,478 |
After 5 years through 10 years | 56 |
After 10 years | 1 |
Mortgage-backed securities with no single maturity | 2,071 |
Amortized Cost | 13,089 | $ 12,467
Fair Value |  |
Within 1 year | 4,399 |
After 1 year through 5 years | 6,002 |
After 5 years through 10 years | 47 |
After 10 years | 1 |
Mortgage-backed securities with no single maturity | 1,798 |
Fair Value | $ 12,247 | $ 11,947

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