Borrowings (Schedule Of Short-Term Debt) (Details) - USD ($) $ in Millions	Jul. 25, 2015	Jul. 26, 2014
Short-term Debt [Line Items]
Amount	$ 3,897	$ 508
Current portion of long-term debt
Short-term Debt [Line Items]
Amount	$ 3,894	$ 500
Effective Rate	2.48%	3.11%
Other notes and borrowings
Short-term Debt [Line Items]
Amount	$ 3	$ 8
Effective Rate	2.44%	2.67%