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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. 27, 2019 | Jul. 28, 2018 | Jul. 29, 2017
Deferred Compensation Plans |  |  |
401(k) and Deferred Compensation Plan [Line Items] |  |  |
Employer matching contribution | 4.50% |  |
Maximum annual contributions | $ 1,500,000.0 |  |
Deferred compensation liability | $ 678,000,000 | $ 651,000,000 |
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 | $ 12,600 |  |
Total matching contribution by the Company for the period | $ 283,000,000 | 269,000,000 | $ 265,000,000
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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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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