Financing Receivables and Operating Leases (Schedule Of Financing Receivables) (Details) - USD ($) $ in Millions	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014	Jul. 27, 2013
Financing Receivables [Line Items]
Allowance for credit loss	$ (375)	$ (382)	$ (349)	$ (344)
Current	4,272	4,491
Noncurrent	4,158	3,858
Deferred revenue:	16,472	15,183
Lease Receivables
Financing Receivables [Line Items]
Financing Receivable Gross	3,272	3,361
Residual value	202	224
Unearned income	(174)	(190)
Allowance for credit loss	(230)	(259)
Current	1,490	1,468
Noncurrent	1,580	1,668
Total, net	3,070	3,136
Loan Receivables
Financing Receivables [Line Items]
Financing Receivable Gross	2,135	1,763
Residual value	0	0
Unearned income	0	0
Allowance for credit loss	(97)	(87)
Current	988	856
Noncurrent	1,050	820
Total, net	2,038	1,676
Financed Service Contracts and Other
Financing Receivables [Line Items]
Financing Receivable Gross	3,370	3,573
Residual value	0	0
Unearned income	0	0
Allowance for credit loss	(48)	(36)
Current	1,794	2,167
Noncurrent	1,528	1,370
Total, net	3,322	3,537
Total
Financing Receivables [Line Items]
Financing Receivable Gross	8,777	8,697
Residual value	202	224
Unearned income	(174)	(190)
Allowance for credit loss	(375)	(382)
Current	4,272	4,491
Noncurrent	4,158	3,858
Total, net	$ 8,430	$ 8,349

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Financing Receivables [Line Items]

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The estimate of the lease property's economic value at the end of the sales-type lease term excluding any amounts guaranteed by either the lessee or a third-party.

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Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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A valuation allowance for financing receivables that are expected to be uncollectible.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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