Balance Sheet and Other Details - Deferred Revenue (Details) - USD ($) $ in Millions	Oct. 25, 2025	Jul. 26, 2025
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 27,969	$ 28,779
Current	15,801	16,416
Noncurrent	12,168	12,363
Product
Disaggregation of Revenue [Line Items]
Total deferred revenue	13,252	13,490
Services
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 14,717	$ 15,289