Short-Term Borrowings And Long-Term Debt (Schedule Of Short-Term Borrowings) (Details) (USD $) In Millions, unless otherwise specified	Jul. 29, 2012		Jul. 31, 2011
Long-term Debt, Unclassified [Abstract]
Commercial paper	$ 352		$ 563
Notes Payable, Current	400		0
Variable-rate bank borrowings	30		92
Fixed-rate borrowings	0		1
Capital leases	0		1
Other	4	[1]	0	[1]
Total short-term borrowings	$ 786		$ 657

[1] Other includes amounts related to interest rate swaps designated as fair-value hedges. For additional information on fair-value interest rate swaps, see Note 12.