Income Taxes (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
Federal:
Current	$ 865	$ 1,583	$ 1,672
Deferred	(93)	43	(383)
Total	772	1,626	1,289
State:
Current	78	130	176
Deferred	13	(20)	(64)
Total	91	110	112
Foreign:
Current	1,432	530	692
Deferred	(114)	(46)	(231)
Total	1,318	484	461
Total	$ 2,181	$ 2,220	$ 1,862