Income Taxes (Additional Information) (Details) (USD $)	12 Months Ended
	Jul. 26, 2014	Jul. 27, 2013	Jul. 28, 2012
Income Tax [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions		$ 794,000,000
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount		184,000,000
Undistributed earnings of certain foreign subsidiaries on which tax is not provided	52,700,000,000
Income Tax Holiday, Aggregate Dollar Amount	1,300,000,000	1,400,000,000	1,300,000,000
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.25	$ 0.26	$ 0.24
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,700,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	29,000,000	115,000,000	146,000,000
Unrecognized Tax Benefits, Income Tax Penalties Expense	8,000,000	2,000,000	21,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	304,000,000	268,000,000	381,000,000
Unrecognized tax benefit that could be reduced in next 12 months	300,000,000
Deferred tax assets valuation allowances	114,000,000	98,000,000
Retroactive R&D Tax Credit
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount		72,000,000
Federal
Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	233,000,000
Operating loss carry forwards, expiration	Jul. 28, 2018
Tax Credit Carryforward, Amount	8,000,000
Tax Credit Carryforward, Expiration Date	Jul. 26, 2014
State and Local Jurisdiction
Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	658,000,000
Deferred tax assets valuation allowances	43,000,000
Tax Credit Carryforward, Amount	710,000,000
Foreign Tax Authority [Member]
Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	699,000,000
Operating loss carry forwards, expiration	Jul. 25, 2015
Deferred tax assets valuation allowances	71,000,000
Tax Credit Carryforward, Amount	13,000,000
Tax Credit Carryforward, Expiration Date	Jul. 31, 2027
Expiring at the end of Fiscal 2015
Income Tax [Line Items]
Income Tax Holiday, Aggregate Dollar Amount	$ 500,000,000
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.10