Income Taxes (Additional Information) (Details) (USD $)	9 Months Ended
Apr. 25, 2015
Income Tax Disclosure [Abstract]
R&D tax benefit related to FY 2014	$ 91,000,000
Unrecognized Tax Benefits	2,000,000,000us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,800,000,000
Unrecognized tax benefit that could be reduced in next 12 months	$ 900,000,000

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Unrecognized Tax Benefit

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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