Taxes on Earnings (Schedule of Deferred Tax Liabilities And Assets) (Details) (USD $) In Millions, unless otherwise specified	Jul. 28, 2013	Jul. 29, 2012
Deferred Tax Liabilities, Property, Plant and Equipment	$ 302	$ 279
Deferred Tax Liabilities, Goodwill and Intangible Assets	484	474
Deferred Tax Liabilities, Other	66	20
Deferred Tax Liabilities, Gross	852	773
Deferred Tax Liabilities, Net	351	145
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	316	311
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	61	194
Deferred Tax Assets, Operating Loss Carryforwards	95	69
Deferred Tax Assets, Capital Loss Carryforwards	104	117
Deferred Tax Assets, Other	73	79
Deferred Tax Assets, Gross	649	770
Deferred Tax Assets, Valuation Allowance	(148)	(142)
Deferred Tax Assets, Net of Valuation Allowance	$ 501	$ 628