Balance Sheet and Other Details - Deferred Revenue (Details) - USD ($) $ in Millions	Apr. 26, 2025	Jul. 27, 2024
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 27,991	$ 28,475
Current	16,081	16,249
Noncurrent	11,910	12,226
Product
Disaggregation of Revenue [Line Items]
Total deferred revenue	13,170	13,219
Services
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 14,821	$ 15,256