Leases - Operating Lease Balances (Details) - USD ($) $ in Millions	Oct. 25, 2025	Jul. 26, 2025
Leases [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating lease right-of-use assets	$ 1,303	$ 1,301
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Operating lease liabilities	$ 403	$ 375
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities	Other long-term liabilities
Operating lease liabilities	$ 1,145	$ 1,175
Total operating lease liabilities	$ 1,548	$ 1,550