Balance Sheet and Other Details - Deferred Revenue (Details) - USD ($) $ in Millions	Jan. 24, 2026	Jul. 26, 2025
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 28,403	$ 28,779
Current	16,199	16,416
Noncurrent	12,204	12,363
Product
Disaggregation of Revenue [Line Items]
Total deferred revenue	13,371	13,490
Services
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 15,032	$ 15,289