Balance Sheet and Other Details - Deferred Revenue (Details) - USD ($) $ in Millions	Jan. 27, 2024	Jul. 29, 2023
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 25,771	$ 25,550
Current	14,011	13,908
Noncurrent	11,760	11,642
Product
Disaggregation of Revenue [Line Items]
Total deferred revenue	11,640	11,505
Service
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 14,131	$ 14,045