Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011
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		234,000,000
Undistributed earnings of certain foreign subsidiaries on which tax is not provided	48,000,000,000
Income Tax Holiday, Aggregate Dollar Amount	1,400,000,000	1,300,000,000	1,300,000,000
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.26	$ 0.24	$ 0.24
IRS audit settlement and RD tax credit	1,000,000,000
Income Tax Examination, Penalties and Interest Expense, Reduced By Amount	230,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,500,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	115,000,000	146,000,000	38,000,000
Unrecognized Tax Benefits, Income Tax Penalties Expense	2,000,000	21,000,000	9,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	268,000,000	381,000,000	214,000,000
Unrecognized tax benefit that could be reduced in next 12 months	200,000,000
Deferred tax assets valuation allowances	98,000,000	60,000,000
Retroactive R&D Tax Credit [Member]
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	72,000,000		65,000,000
Federal
Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	259,000,000
Operating loss carry forwards, expiration	Jul. 28, 2018
Tax Credit Carryforward, Amount	7,000,000
Tax Credit Carryforward, Expiration Date	Jul. 26, 2014
State and Local Jurisdiction
Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	1,000,000,000
Operating loss carry forwards, expiration	Jul. 26, 2014
Deferred tax assets valuation allowances	19,000,000
Tax Credit Carryforward, Amount	640,000,000
Foreign Tax Authority [Member]
Income Tax [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	357,000,000
Operating loss carry forwards, expiration	Jul. 26, 2014
Deferred tax assets valuation allowances	79,000,000
Tax Credit Carryforward, Amount	13,000,000
Tax Credit Carryforward, Expiration Date	Jul. 31, 2027
Expiring at the end of Fiscal 2015 [Member]
Income Tax [Line Items]
Gross Income Tax Benefits Attributable To Tax Incentives		$ 500,000,000
Gross Income Tax Benefits Attributable To Tax Incentives Per Diluted Share	$ 0.10