| **Allowance for Doubtful Accounts - Retail, Wholesale, Trade & Other (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                                                                                                                                                  | 3 Months Ended | 6 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Financing Receivable, Allowance for Credit Losses [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                   |           |                |   |  |   |  |   |  |
| Financing Receivable By Class Number of Portfolio Segments                                                                                                                                                                                                                                                                                                                                                                                           |           |                |   |  | 2 |  |   |  |
| Allowance for doubtful accounts at beginning of period                                                                                                                                                                                                                                                                                                                                                                                               | $ 49           |                | $ 47 |  | $ 51 |  | $ 50 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                                                                                                                   | 11             |                | 0 |  | 11 |  | 0 |  |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                                                                                                               | (3)            | [1]            | (2) | [1] | (6) | [1] | (5) | [1] |
| Financing Receivable, Allowance for Credit Losses, Other                                                                                                                                                                                                                                                                                                                                                                                             | 1              | [2]            | 0 | [2] | 2 | [2] | 0 | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                                                                                                                     | 58             |                | 45 |  | 58 |  | 45 |  |
| Loss on Contract Termination for Default                                                                                                                                                                                                                                                                                                                                                                                                             | 1              |                | 2 |  | 1 |  | 3 |  |
| Retail Portfolio [Member]                                                                                                                                                                                                                                                                                                                                                                                                                            |           |                |   |  |   |  |   |  |
| **Financing Receivable, Allowance for Credit Losses [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                   |           |                |   |  |   |  |   |  |
| Allowance for doubtful accounts at beginning of period                                                                                                                                                                                                                                                                                                                                                                                               | 23             |                | 28 |  | 27 |  | 31 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                                                                                                                   | 1              |                | 0 |  | (1) |  | (2) |  |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                                                                                                               | (3)            | [1]            | (2) | [1] | (6) | [1] | (3) | [1] |
| Financing Receivable, Allowance for Credit Losses, Other                                                                                                                                                                                                                                                                                                                                                                                             | 1              | [2]            | 0 | [2] | 2 | [2] | 0 | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                                                                                                                     | 22             |                | 26 |  | 22 |  | 26 |  |
| Wholesale Portfolio [Member]                                                                                                                                                                                                                                                                                                                                                                                                                         |           |                |   |  |   |  |   |  |
| **Financing Receivable, Allowance for Credit Losses [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                   |           |                |   |  |   |  |   |  |
| Allowance for doubtful accounts at beginning of period                                                                                                                                                                                                                                                                                                                                                                                               | 2              |                | 3 |  | 0 |  | 3 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                                                                                                                   | 0              |                | (1) |  | 2 |  | (1) |  |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                                                                                                               | 0              | [1]            | 0 | [1] | 0 | [1] | 0 | [1] |
| Financing Receivable, Allowance for Credit Losses, Other                                                                                                                                                                                                                                                                                                                                                                                             | 0              | [2]            | 0 | [2] | 0 | [2] | 0 | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                                                                                                                     | 2              |                | 2 |  | 2 |  | 2 |  |
| Financing Receivable Number Of Classes Of Receivables In Each Portfolio                                                                                                                                                                                                                                                                                                                                                                              |           |                |   |  | 1 |  |   |  |
| Trade and Other Receivables [Member]                                                                                                                                                                                                                                                                                                                                                                                                                 |           |                |   |  |   |  |   |  |
| **Financing Receivable, Allowance for Credit Losses [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                   |           |                |   |  |   |  |   |  |
| Allowance for doubtful accounts at beginning of period                                                                                                                                                                                                                                                                                                                                                                                               | 24             |                | 16 |  | 24 |  | 16 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                                                                                                                   | 10             |                | 1 |  | 10 |  | 3 |  |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                                                                                                               | 0              | [1]            | 0 | [1] | 0 | [1] | (2) | [1] |
| Financing Receivable, Allowance for Credit Losses, Other                                                                                                                                                                                                                                                                                                                                                                                             | 0              | [2]            | 0 | [2] | 0 | [2] | 0 | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                                                                                                                     | $ 34           |                | $ 17 |  | $ 34 |  | $ 17 |  |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| [1]We repossess sold and leased vehicles on defaulted finance receivables and leases, and place them into Inventories. Losses recognized at the time of repossession and charged against the allowance for doubtful accounts were less than $1 million for both the three and six months ended April 30, 2013 and $2 million and $3 million for the three and six months ended April 30, 2012, respectively.[2]Amounts include currency translation. |

| X                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing Receivable, Allowance for Credit Losses, Other
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| X                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing Receivable By Class Number of Portfolio Segments
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| X                                                                                                                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
A valuation allowance for financing receivables that are expected to be uncollectible.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of direct write-downs of financing receivables charged against the allowance.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the loss on termination of a contract for default.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.
+ References
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