Taxes On Earnings (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 28, 2013	Jul. 29, 2012	Jul. 31, 2011
Operating Loss Carryforwards	$ 423
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Operating Loss Carryforwards, Valuation Allowance	145
Valuation Allowance, Deferred Tax Asset, Change in Amount	6	(14)
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	7
Undistributed Earnings Non-Domestic Subsidiaries For Which Deferred US Income Taxes Have Not Been Provided	714
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	23	18	16
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2	6
Income Tax Examination, Penalties and Interest Accrued	2	8
Tax Loss Carryforwards Expiring 2014 to 2033 [Member]
Operating Loss Carryforwards	183
Tax Loss Carryfowards Indefinitely [Member]
Operating Loss Carryforwards	240
Minimum [Member]
Operating Loss Carryforwards, Expiration Dates	2014
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	15.00%
Maximum [Member]
Operating Loss Carryforwards, Expiration Dates	2033
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Non-U.S. [Member]
Tax Credit Carryforward, Expiration Date	Jul. 31, 2023	Jul. 31, 2022
Capital Loss Carryforward [Member] | Non-U.S. [Member]
Other Tax Carryforward, Gross Amount	342
Capital Loss Carryforward [Member] | United States [Member]
Other Tax Carryforward, Gross Amount	1
Other Tax Carryforward, Expiration Dates	2017
State and Local Jurisdiction [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign		3
Deferred Tax Assets, Tax Credit Carryforwards	$ 10
State and Local Jurisdiction [Member] | Minimum [Member]
Tax Credit Carryforward, Expiration Date	Aug. 03, 2014	Aug. 03, 2014
State and Local Jurisdiction [Member] | Maximum [Member]
Tax Credit Carryforward, Expiration Date	Jul. 31, 2022	Aug. 01, 2021