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Employee Benefit Plans - Additional Information - Employee 401(k) Plans and Deferred Compensation Plans (Details) - USD ($)	12 Months Ended
	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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

+ References

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

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- Definition

Maximum amount the employee may contribute to a defined contribution plan.

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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