Financing Receivables and Operating Leases (Schedule Of Aging Analysis Of Financing Receivables) (Details) (USD $) In Millions, unless otherwise specified	Jan. 24, 2015	Jul. 26, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	$ 345	$ 338
61-90 days past due (includes billed and unbilled)	240	307
90 days or over past due ( includes billed and unbilled)	786	452
Total Past Due	1,371	1,097
Current	6,535	7,090
Total	7,906	8,187
Nonaccrual Financing Receivables	116	79
Impaired Financing Receivables	89	69
Lease Receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	171	63
61-90 days past due (includes billed and unbilled)	63	48
90 days or over past due ( includes billed and unbilled)	224	203
Total Past Due	458	314
Current	2,705	2,980
Total	3,163	3,294
Nonaccrual Financing Receivables	53	48
Impaired Financing Receivables	48	41
Loan Receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	30	7
61-90 days past due (includes billed and unbilled)	42	21
90 days or over past due ( includes billed and unbilled)	177	28
Total Past Due	249	56
Current	1,425	1,627
Total	1,674	1,683
Nonaccrual Financing Receivables	33	19
Impaired Financing Receivables	33	19
Financed Service Contracts and Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	144	268
61-90 days past due (includes billed and unbilled)	135	238
90 days or over past due ( includes billed and unbilled)	385	221
Total Past Due	664	727
Current	2,405	2,483
Total	3,069	3,210
Nonaccrual Financing Receivables	30	12
Impaired Financing Receivables	$ 8	$ 9

FInancing receivables net of unearned income

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- Definition

Financing receivables that are less than 60 days past due but more than 29 days past due.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524

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Financing receivables that are less than 90 days past due but more than 59 days past due.

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Financing receivables that are current.

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Financing receivables that are equal to or greater than 90 days past due.

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

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Recorded Investment in financing receivables that are past due at the balance sheet date.

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524

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