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Stockholders' Equity - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Jul. 31, 2021 | Jul. 25, 2020 | Jul. 27, 2019
Stockholders' Equity Note [Abstract] |  |  |
Cash dividends paid per common share (in dollars per share) | $ 1.46 | $ 1.42 | $ 1.36
Payment of dividends | $ 6,163,000,000 | $ 6,016,000,000 | $ 5,979,000,000
Remaining authorized repurchase amount | 7,900,000,000 |  |
Stock repurchase program |  |  |
Class of Stock [Line Items] |  |  |
Stock repurchases pending settlement | $ 25,000,000 | $ 0 | $ 40,000,000

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