Taxes On Earnings (Schedule Of Deferred Tax Liabilities And Assets) (Details) (USD $) In Millions	Jul. 31, 2011	Aug. 01, 2010
Taxes On Earnings
Depreciation	$ 253	$ 221
Amortization	474	449
Other	14	13
Deferred tax liabilities	741	683
Benefits and compensation	307	319
Pension benefits	93	134
Tax loss carryforwards	84	67
Capital loss carryforwards	122	101
Other	83	76
Gross deferred tax assets	689	697
Deferred tax asset valuation allowance	(156)	(123)
Net deferred tax assets	533	574
Net deferred tax liability	$ 208	$ 109