Taxes on Earnings Taxes on Earnings (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2016	Aug. 02, 2015	Aug. 03, 2014
Operating Loss Carryforwards	$ 173
Operating Loss Carryforwards, Subject to Expiration	157
Operating Loss Carryforwards, Not Subject to Expiration	16
Operating Loss Carryforwards, Valuation Allowance	143
Tax Credit Carryforward, Amount	88	$ 85
Valuation Allowance, Deferred Tax Asset, Change in Amount	(4)	(29)
Undistributed Earnings of Foreign Subsidiaries	638
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	42	39	$ 23
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	5	5
Income Tax Examination, Penalties and Interest Expense	3	1	$ 1
Income Tax Examination, Penalties and Interest Accrued	6	3
State and Local Jurisdiction [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Other	2	$ 2
Non-U.S. [Member] | Capital Loss Carryforward [Member]
Tax Credit Carryforward, Amount	$ 307
Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Date	Jul. 30, 2017
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Tax Credit Carryforward, Expiration Date	Jul. 29, 2018	Jul. 29, 2018
Latest Tax Year [Member]
Operating Loss Carryforwards, Expiration Date	Jul. 31, 2036
Latest Tax Year [Member] | State and Local Jurisdiction [Member]
Tax Credit Carryforward, Expiration Date	Jul. 28, 2025	Jul. 28, 2024