Income Taxes (Breakdown Between Current And Noncurrent Net Deferred Tax Assets) (Details) (USD $) In Millions, unless otherwise specified	Jul. 26, 2014	Jul. 27, 2013
Income Tax Disclosure [Abstract]
Deferred tax assets—current	$ 2,808	$ 2,616
Deferred tax liabilities—current	(134)	(114)
Deferred tax assets—noncurrent	1,700	1,539
Deferred tax liabilities—noncurrent	(369)	(399)
Total net deferred tax assets	$ 4,005	$ 3,642

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed within one year or operating cycle, if longer.

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