Borrowings - Schedule of Short-Term Debt (Details) - USD ($) $ in Millions	Apr. 26, 2025	Jul. 27, 2024
Short-term Debt [Line Items]
Short-term debt	$ 6,422	$ 11,341
Senior Notes
Short-term Debt [Line Items]
Short-term debt	$ 2,247	$ 488
Effective Rate	4.48%	6.66%
Commercial paper
Short-term Debt [Line Items]
Short-term debt	$ 4,174	$ 10,853
Effective Rate	4.49%	5.43%
Current portion of other debt
Short-term Debt [Line Items]
Short-term debt	$ 1	$ 0
Effective Rate	1.13%	0.00%