Income Taxes (Provision For Income Taxes) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011
Income Taxes
Federal, Current	$ 601	$ 1,836	$ 914
Federal, Deferred	152	(270)	(168)
Federal,Total	753	1,566	746
State, Current	81	119	49
State, Deferred	48	(53)	83
State, Total	129	66	132
Foreign, Current	599	477	529
Foreign, Deferred	(237)	9	(72)
Foreign, Total	362	486	457
Provision for income taxes, total	$ 1,244	$ 2,118	$ 1,335