Balance Sheet and Other Details - Deferred Revenue (Details) - USD ($) $ in Millions	Jan. 25, 2025	Jul. 27, 2024
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 27,795	$ 28,475
Current	15,999	16,249
Noncurrent	11,796	12,226
Product
Disaggregation of Revenue [Line Items]
Total deferred revenue	13,033	13,219
Services
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 14,762	$ 15,256