Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Summary Of Significant Accounting Policies [Line Items]
Average lease term	4 years
Financing receivable, threshold period past due	31 days
Financing receivable, threshold for not accruing interest	120 days
Depreciation and amortization expenses	$ 800	$ 800	$ 900
Allowance for future sales returns	43	55
Advertising costs	$ 219	$ 268	$ 187
Minimum
Summary Of Significant Accounting Policies [Line Items]
Loan receivables and financed service contracts term	1 year
Channel partners revolving short-term financing payment term	60 days
Maximum
Summary Of Significant Accounting Policies [Line Items]
Loan receivables and financed service contracts term	3 years
Channel partners revolving short-term financing payment term	90 days