v2.4.0.6

Financing Receivables and Guarantees (Schedule Of Financing Receivables Categorized By Internal Credit Risk Rating) (Detail) (USD $) In Millions, unless otherwise specified	Jul. 28, 2012	Jul. 30, 2011
Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	$ 3,179	$ 2,861
Loan Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	1,796	1,468
Financed Service Contracts & Other
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	2,651	2,637
Internal Credit Risk Rating 1 To 4
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	3,915	3,534
Internal Credit Risk Rating 1 To 4 | Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	1,532	1,249
Internal Credit Risk Rating 1 To 4 | Loan Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	831	662
Internal Credit Risk Rating 1 To 4 | Financed Service Contracts & Other
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	1,552	1,623
Internal Credit Risk Rating 5 To 6
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	3,293	3,000
Internal Credit Risk Rating 5 To 6 | Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	1,342	1,275
Internal Credit Risk Rating 5 To 6 | Loan Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	921	767
Internal Credit Risk Rating 5 To 6 | Financed Service Contracts & Other
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	1,030	958
Internal Credit Risk Rating 7 And Higher
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	144	136
Internal Credit Risk Rating 7 And Higher | Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	31	41
Internal Credit Risk Rating 7 And Higher | Loan Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	44	39
Internal Credit Risk Rating 7 And Higher | Financed Service Contracts & Other
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	69	56
Total Internal Credit Risk Rating
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	7,352	6,670
Total Internal Credit Risk Rating | Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	2,905	2,565
Total Internal Credit Risk Rating | Loan Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	1,796	1,468
Total Internal Credit Risk Rating | Financed Service Contracts & Other
Financing Receivable, Recorded Investment [Line Items]
Gross receivables net of unearned income	2,651	2,637
Residual Value
Financing Receivable, Recorded Investment [Line Items]
Residual Value	274	296
Residual Value | Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Residual Value	274	296
Gross Receivables, Net Of Unearned Income
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	7,626	6,966
Gross Receivables, Net Of Unearned Income | Lease Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	3,179	2,861
Gross Receivables, Net Of Unearned Income | Loan Receivables
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	1,796	1,468
Gross Receivables, Net Of Unearned Income | Financed Service Contracts & Other
Financing Receivable, Recorded Investment [Line Items]
Gross Receivables, Net of Unearned Income	$ 2,651	$ 2,637

X

- Definition

The net investment in direct financing leases as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph a(i)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6952072&loc=d3e45377-112738

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under direct financing leases, including any guarantee of residual value and executory costs. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph a(i)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6952072&loc=d3e45377-112738

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

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

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph a(i)(b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6952072&loc=d3e45377-112738

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration