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Employee Benefit Plans - Additional Information - Employee 401(k) Plans and Deferred Compensation Plans (Details) - USD ($) | 12 Months Ended
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Jul. 31, 2021 | Jul. 25, 2020 | Jul. 27, 2019
Deferred Compensation Plans |  |  |
401(k) and Deferred Compensation Plan [Line Items] |  |  |
Employer matching contribution | 4.50% |  |
Maximum annual contributions | $ 1,500,000 |  |
Deferred compensation liability | $ 845,000,000 | $ 704,000,000 |
401(K) Plan |  |  |
401(k) and Deferred Compensation Plan [Line Items] |  |  |
Allowed employee contributions (up to) | 75.00% |  |
Employer matching contribution, percentage of the first 4.5% of eligible earnings | 100.00% |  |
Employer matching contribution | 4.50% |  |
Maximum matching contribution | $ 13,050 |  |
Total matching contribution by the Company for the period | $ 290,000,000 | 295,000,000 | $ 283,000,000
401(k) Catch Up Contribution |  |  |
401(k) and Deferred Compensation Plan [Line Items] |  |  |
Allowed employee contributions (up to) | 75.00% |  |
Total matching contribution by the Company for the period | $ 0 | $ 0 | $ 0

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