Borrowings - Schedule of Short-Term Debt (Details) - USD ($) $ in Millions	Jan. 25, 2025	Jul. 27, 2024
Short-term Debt [Line Items]
Short-term debt	$ 11,413	$ 11,341
Senior Notes
Short-term Debt [Line Items]
Short-term debt	$ 496	$ 488
Effective Rate	5.66%	6.66%
Commercial paper
Short-term Debt [Line Items]
Short-term debt	$ 10,916	$ 10,853
Effective Rate	4.75%	5.43%
Current portion of other debt
Short-term Debt [Line Items]
Short-term debt	$ 1	$ 0
Effective Rate	1.13%	0.00%