Taxes on Earnings Schedule of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Millions	Jul. 31, 2016	Aug. 02, 2015
Income Tax Disclosure [Abstract]
Deferred Tax Liabilities, Property, Plant and Equipment	$ 362	$ 306
Deferred Tax Liabilities, Goodwill and Intangible Assets	541	541
Deferred Tax Liabilities, Other	23	17
Deferred Tax Liabilities, Gross	926	864
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	266	298
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	185	92
Deferred Tax Assets, Operating Loss Carryforwards	37	44
Deferred Tax Assets, Capital Loss Carryforwards	88	85
Deferred Tax Assets, Other	113	101
Deferred Tax Assets, Gross	689	620
Deferred Tax Assets, Valuation Allowance	(118)	(122)
Deferred Tax Assets, Net of Valuation Allowance	571	498
Deferred Tax Liabilities, Net	$ 355	$ 366