Borrowings (Schedule Of Short-Term Debt) (Details) - USD ($) $ in Millions	Oct. 24, 2015	Jul. 25, 2015
Short-term Debt [Line Items]
Amount	$ 3,027	$ 3,897
Current portion of long-term debt
Short-term Debt [Line Items]
Amount	$ 3,025	$ 3,894
Effective Rate	3.09%	2.48%
Other short-term debt
Short-term Debt [Line Items]
Amount	$ 2	$ 3
Effective Rate	2.08%	2.44%