| **Debt - Schedule of Debt Instruments (Details) - USD ($) $ in Millions**                                                                                  | Oct. 31, 2015 | Aug. 31, 2015 | Oct. 31, 2014 | Apr. 30, 2014 | Oct. 31, 2013 | Oct. 31, 2012 | Oct. 31, 2009 |
|------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|---------------|---------------|---------------|---------------|---------------|
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | $ 81          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 5,298         |          |          |          |          |          |          |
| Long-term Debt and Capital Lease Obligations                                                                                                               | 4,188         |          | $ 3,929       |          |          |          |          |
| Line of Credit [Member]                                                                                                                                    |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      |          | $ 10          |          |          |          |          |          |
| Convertible Subordinated Debt [Member] | Four Point Five Zero Senior Subordinated Convertible Notes [Member]                                               |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      |          |          |          |          | $ 1           |          |          |
| Convertible Subordinated Debt [Member] | Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member]                                     |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      |          |          |          | $ 1           |          |          |          |
| Financial Services Operations [Member]                                                                                                                     |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | 0             |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 2,100         |          |          |          |          |          |          |
| Long-term Debt and Capital Lease Obligations, Including Current Maturities                                                                                 | 2,100         |          | 2,266         |          |          |          |          |
| Long-term Debt and Capital Lease Obligations, Current                                                                                                      | 1,007         |          | 1,195         |          |          |          |          |
| Long-term Debt and Capital Lease Obligations                                                                                                               | 1,093         |          | 1,071         |          |          |          |          |
| Financial Services Operations [Member] | Secured Debt [Member]                                                                                             |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 870           |          | 914           |          |          |          |          |
| Financial Services Operations [Member] | Line of Credit [Member]                                                                                           |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 1,063         |          | 1,242         |          |          |          |          |
| Financial Services Operations [Member] | Commercial Paper [Member]                                                                                         |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 86            |          | 74            |          |          |          |          |
| Financial Services Operations [Member] | Borrowings Secured By Operating and Finance Leases [Member]                                                       |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 81            |          | 36            |          |          |          |          |
| Manufacturing Operations [Member]                                                                                                                          |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | 81            |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 3,198         |          |          |          |          |          |          |
| Long-term Debt and Capital Lease Obligations, Including Current Maturities                                                                                 | 3,198         |          | 2,958         |          |          |          |          |
| Long-term Debt and Capital Lease Obligations, Current                                                                                                      | 103           |          | 100           |          |          |          |          |
| Long-term Debt and Capital Lease Obligations                                                                                                               | 3,095         |          | 2,858         |          |          |          |          |
| Manufacturing Operations [Member] | Line of Credit [Member]                                                                                                |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | 17            |          | 3             |          |          |          |          |
| Long-term Debt                                                                                                                                             | 1,023         |          | 694           |          |          |          |          |
| Manufacturing Operations [Member] | Notes Payable to Banks [Member] | Eight Point Two Five Percent Senior Notes [Member]                                   |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | $ 18          |          | 20            |          |          |          |          |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                                          | 8.25%         |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | $ 1,182       |          | 1,180         |          |          |          |          |
| Manufacturing Operations [Member] | Convertible Subordinated Debt [Member] | Three Point Zero Percent Senior Subordinated Convertible Notes [Member]       |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                                          |          |          |          |          |          |          | 3.00%         |
| Manufacturing Operations [Member] | Convertible Subordinated Debt [Member] | Four Point Five Zero Senior Subordinated Convertible Notes [Member]           |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | $ 14          |          | 19            |          |          |          |          |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                                          | 4.50%         |          |          |          | 4.50%         |          |          |
| Long-term Debt                                                                                                                                             | $ 186         |          | 181           |          |          |          |          |
| Manufacturing Operations [Member] | Convertible Subordinated Debt [Member] | Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Unamortized Discount                                                                                                                      | $ 32          |          | 40            |          |          |          |          |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                                          | 4.75%         |          |          | 4.75%         |          |          |          |
| Long-term Debt                                                                                                                                             | $ 379         |          | 371           |          |          |          |          |
| Manufacturing Operations [Member] | Debt Of Majority Owned Dealerships [Member]                                                                            |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 28            |          | 30            |          |          |          |          |
| Manufacturing Operations [Member] | Financing Arrangements and Capital Lease Obligations [Member]                                                          |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | $ 49          |          | 54            |          |          |          |          |
| Manufacturing Operations [Member] | Tax Exempt Bond [Member]                                                                                               |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                                          | 6.50%         |          |          |          |          | 6.50%         |          |
| Long-term Debt                                                                                                                                             | $ 225         |          | 225           |          |          |          |          |
| Manufacturing Operations [Member] | Promissory Note [Member]                                                                                               |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 0             |          | 10            |          |          |          |          |
| Manufacturing Operations [Member] | Financed lease obligations [Member]                                                                                    |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | 111           |          | 184           |          |          |          |          |
| Manufacturing Operations [Member] | Notes Payable, Other Payables [Member]                                                                                 |          |          |          |          |          |          |          |
| **Debt Instrument [Line Items]**                                                                                                                           |          |          |          |          |          |          |          |
| Long-term Debt                                                                                                                                             | $ 15          |          | $ 29          |          |          |          |          |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Contractual interest rate for funds borrowed, under the debt agreement.
+ References
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.
+ References
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| - Definition
Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of long-term debt and capital lease obligations including current maturities.
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No definition available.
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