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Financing Receivables And Guarantees (Schedule Of Financing Receivables Categorized By Internal Credit Risk Rating) (Detail) (USD $)
In Millions, unless otherwise specified
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Oct. 27, 2012
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Jul. 28, 2012
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Oct. 29, 2011
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Loan Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases |
$ 1,816 |
$ 1,796 |
$ 1,468 |
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Financed Service Contracts And Other [Member]
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|
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| Financing Receivables And Guarantees [Line Items] |
|
|
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| Capital Leases, Net Investment in Direct Financing Leases |
2,639 |
2,651 |
2,557 |
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Rating One To Four [Member]
|
|
|
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| Financing Receivables And Guarantees [Line Items] |
|
|
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
4,078 |
3,915 |
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Rating One To Four [Member] | Lease Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
1,602 |
1,532 |
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Rating One To Four [Member] | Loan Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
945 |
831 |
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Rating One To Four [Member] | Financed Service Contracts And Other [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
1,531 |
1,552 |
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Rating Five To Six [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
3,261 |
3,293 |
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Rating Five To Six [Member] | Lease Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
1,417 |
1,342 |
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Rating Five To Six [Member] | Loan Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
834 |
921 |
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Rating Five To Six [Member] | Financed Service Contracts And Other [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
1,010 |
1,030 |
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Rating Seven And Higher [Member]
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| Financing Receivables And Guarantees [Line Items] |
|
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
177 |
144 |
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Rating Seven And Higher [Member] | Lease Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
42 |
31 |
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Rating Seven And Higher [Member] | Loan Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
37 |
44 |
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Rating Seven And Higher [Member] | Financed Service Contracts And Other [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
98 |
69 |
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Total Internal Credit Risk Rating [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
7,516 |
7,352 |
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Total Internal Credit Risk Rating [Member] | Lease Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
|
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
3,061 |
2,905 |
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Total Internal Credit Risk Rating [Member] | Loan Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
|
|
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
1,816 |
1,796 |
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Total Internal Credit Risk Rating [Member] | Financed Service Contracts And Other [Member]
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| Financing Receivables And Guarantees [Line Items] |
|
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| Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received |
2,639 |
2,651 |
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Residual Value [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property |
279 |
274 |
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Residual Value [Member] | Lease Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property |
279 |
274 |
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Residual Value [Member] | Loan Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property |
0 |
0 |
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Residual Value [Member] | Financed Service Contracts And Other [Member]
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| Financing Receivables And Guarantees [Line Items] |
|
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| Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property |
0 |
0 |
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Internal Credit Risk Rating [Member]
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|
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases |
7,795 |
7,626 |
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Financing Receivable, Recorded Investment, Class of Financing Receivable [Domain] | Lease Receivables [Member]
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| Financing Receivables And Guarantees [Line Items] |
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| Capital Leases, Net Investment in Direct Financing Leases |
$ 3,340 |
$ 3,179 |
$ 2,849 |