Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 28, 2013	Jul. 29, 2012	Jul. 31, 2011
Operating Leases, Rent Expense, Net	$ 54	$ 48	$ 50
Operating Leases, Future Minimum Payments Due, Next Twelve Months	45
Operating Leases, Future Minimum Payments, Due in Two Years	36
Operating Leases, Future Minimum Payments, Due in Three Years	32
Operating Leases, Future Minimum Payments, Due in Four Years	25
Operating Leases, Future Minimum Payments, Due in Five Years	19
Operating Leases, Future Minimum Payments, Due Thereafter	47
Number of bank loans guarantees related to independent distributors	2,000
Maximum potential amount of future payments	165
Segment, Discontinued Operations [Member]
Operating Leases, Rent Expense, Net	8	9	9
Operating Leases, Future Minimum Payments Due, Next Twelve Months	8
Operating Leases, Future Minimum Payments, Due in Two Years	6
Operating Leases, Future Minimum Payments, Due in Three Years	6
Operating Leases, Future Minimum Payments, Due in Four Years	3
Operating Leases, Future Minimum Payments, Due in Five Years	2
Operating Leases, Future Minimum Payments, Due Thereafter	$ 2