| **Allowance for Doubtful Accounts - Retail, Wholesale, Trade & Other (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                                                      | 12 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                                                                                                                                                                                                                                                                                                   | $ 51            |  | $ 50 |  | $ 96 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                       | 20              |  | 14 |  | (6) | [1] |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                   | (11)            | [2] | (13) | [2] | (40) | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                         | 60              |  | 51 |  | 50 |  |
| Loss on Contract Termination for Default                                                                                                                                                                                                                                                                                                                 | 2               |  | 6 |  | 20 |  |
| Retail Portfolio [Member]                                                                                                                                                                                                                                                                                                                                |            |  |   |  |   |  |
| **Financing Receivable, Allowance for Credit Losses [Line Items]**                                                                                                                                                                                                                                                                                       |            |  |   |  |   |  |
| Allowance for doubtful accounts at beginning of period                                                                                                                                                                                                                                                                                                   | 27              |  | 31 |  | 58 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                       | 4               |  | 3 |  | (5) | [1] |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                   | (10)            | [2] | (7) | [2] | (22) | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                         | 21              |  | 27 |  | 31 |  |
| Wholesale Portfolio [Member]                                                                                                                                                                                                                                                                                                                             |            |  |   |  |   |  |
| **Financing Receivable, Allowance for Credit Losses [Line Items]**                                                                                                                                                                                                                                                                                       |            |  |   |  |   |  |
| Allowance for doubtful accounts at beginning of period                                                                                                                                                                                                                                                                                                   | 0               |  | 2 |  | 2 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                       | 2               |  | (2) |  | 0 | [1] |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                   | 0               | [2] | 0 | [2] | 0 | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                         | 2               |  | 0 |  | 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              |  | 17 |  | 36 |  |
| Provision for doubtful accounts, net of recoveries                                                                                                                                                                                                                                                                                                       | 14              |  | 13 |  | (1) | [1] |
| Charge-off of accounts                                                                                                                                                                                                                                                                                                                                   | (1)             | [2] | (6) | [2] | (18) | [2] |
| Allowance for doubtful accounts at end of period                                                                                                                                                                                                                                                                                                         | $ 37            |  | $ 24 |  | $ 17 |  |
|                                                                                                                                                                                                                                                                                                                                                          |
| [1]Amounts include currency translation.[2]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 $2 million, $6 million, and $20 million in 2013, 2012, and 2011, respectively. |

| X                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing Receivable By Class Number of Portfolio Segments
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing Receivable Number Of Classes Of Receivables In Each Portfolio
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
A valuation allowance for financing receivables that are expected to be uncollectible.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524
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| X                                                                                                                                                                                        |
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of direct write-downs of financing receivables charged against the allowance.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the loss on termination of a contract for default.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.
+ References
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