Balance Sheet and Other Details - Deferred Revenue (Details) - USD ($) $ in Millions	Jul. 27, 2024	Jul. 29, 2023
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 28,475	$ 25,550
Current	16,249	13,908
Noncurrent	12,226	11,642
Product
Disaggregation of Revenue [Line Items]
Deferred revenue	13,219	11,505
Services
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 15,256	$ 14,045