| **Property and Equipment, Net Equipment Leased to Others (Details) (Details) (USD $)In Millions, unless otherwise specified** | Oct. 31, 2014                                                                                                                                                               | Oct. 31, 2013                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Property, Plant and Equipment [Line Items]**                                                                                |                                                                                                                                                                        |                                                                                                                                                                        |
| Property, Plant and Equipment, Gross                                                                                          | $ 4,097us-gaap_PropertyPlantAndEquipmentGross                                                                                                                               | $ 4,181us-gaap_PropertyPlantAndEquipmentGross                                                                                                                               |
| Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment                                          | 2,535us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment                                                                                       | 2,440us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment                                                                                       |
| Property and equipment, net                                                                                                   | 1,562us-gaap_PropertyPlantAndEquipmentNet                                                                                                                                   | 1,741us-gaap_PropertyPlantAndEquipmentNet                                                                                                                                   |
| Capital Leased Assets, Gross                                                                                                  | 70us-gaap_CapitalLeasedAssetsGross                                                                                                                                          | 93us-gaap_CapitalLeasedAssetsGross                                                                                                                                          |
| Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation                                         | 32us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation                                                                                           | 31us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation                                                                                           |
| Capital Leases, Balance Sheet, Assets by Major Class, Net                                                                     | 38us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet                                                                                                                    | 62us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet                                                                                                                    |
| Equipment Leased to Other Party [Member]                                                                                      |                                                                                                                                                                        |                                                                                                                                                                        |
| **Property, Plant and Equipment [Line Items]**                                                                                |                                                                                                                                                                        |                                                                                                                                                                        |
| Property, Plant and Equipment, Gross                                                                                          | 677us-gaap_PropertyPlantAndEquipmentGross/ us-gaap_PropertyPlantAndEquipmentByTypeAxis= us-gaap_EquipmentLeasedToOtherPartyMember                                           | 663us-gaap_PropertyPlantAndEquipmentGross/ us-gaap_PropertyPlantAndEquipmentByTypeAxis= us-gaap_EquipmentLeasedToOtherPartyMember                                           |
| Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment                                          | 210us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment/ us-gaap_PropertyPlantAndEquipmentByTypeAxis= us-gaap_EquipmentLeasedToOtherPartyMember | 191us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment/ us-gaap_PropertyPlantAndEquipmentByTypeAxis= us-gaap_EquipmentLeasedToOtherPartyMember |
| Property and equipment, net                                                                                                   | $ 467us-gaap_PropertyPlantAndEquipmentNet/ us-gaap_PropertyPlantAndEquipmentByTypeAxis= us-gaap_EquipmentLeasedToOtherPartyMember                                           | $ 472us-gaap_PropertyPlantAndEquipmentNet/ us-gaap_PropertyPlantAndEquipmentByTypeAxis= us-gaap_EquipmentLeasedToOtherPartyMember                                           |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
+ References
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| X                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
+ References
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| X                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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