| **Goodwill and other intangible assets, net (Details)In Millions, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 12 Months Ended |     | 12 Months Ended |     |        |     |        |        |     |        |     |        |     |        |     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|-----|-----------------|-----|--------|-----|--------|--------|-----|--------|-----|--------|-----|--------|-----|
||
| **Goodwill [Roll Forward]**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |            |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Goodwill, Beginning Balance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | $ 324           |     | $ 318           |     | $ 297  |     |   | $ 81   |     | $ 74   |     | $ 84   |     | $ 205  |     | $ 206 |  | $ 175 |  | $ 38 |  | $ 38 |  | $ 38 |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Impairments                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | 0               |     |            |     | (2)    |     |   | 0      |     |   |     | (2)    |     |   |     |   |  | 0 |  |   |  |   |  | 0 |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Currency Translation                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 2               |     | 5               |     | 36     |     |   | 0      |     | 0      |     | 0      |     | 2      |     | 5 |  | 36 |  | 0 |  | 0 |  | 0 |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Adjustments                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | (7)             | [1] | (6)             | [1] | (12)   | [1] |   | 0      | [1] | 0      | [1] | (7)    | [1] | (7)    | [1] | (6) | [1] | (5) | [1] | 0 | [1] | 0 | [1] | 0 | [1] |   |   |   |   |   |   |   |   |   |   |   |   |
| Dispositions                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |            |     |            |     | (1)    |     |   |   |     |   |     | (1)    |     |   |     |   |  | 0 |  |   |  |   |  | 0 |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Acquisitions                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 0               |     | 7               |     |   |     |   | 0      |     | 7      |     |   |     | 0      |     | 0 |  |   |  | 0 |  | 0 |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Goodwill, Ending Balance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 319             |     | 324             |     | 318    |     |   | 81     |     | 81     |     | 74     |     | 200    |     | 205 |  | 206 |  | 38 |  | 38 |  | 38 |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Indefinite-Lived Intangible Assets (Excluding Goodwill)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | 67              |     | 69              |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  | 7 | 10 | 60 | 59 |   |   |   |   |   |   |   |   |
| Royalty Guarantees, Commitments, Amount                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |            |     |            |     |   |     | 30     |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Accrued Royalties                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 13              |     |            |     |   |     | 9      |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| **Intangible assets subject to amortization**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |            |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| Gross carrying value                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 266             |     | 317             |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   | 135 | 194 | 17 | 59 | 27 | 27 | 87 | 37 |
| Accumulated amortization                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | (99)            |     | (124)           |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   | (52) | (69) | (1) | (15) | (27) | (27) | (19) | (13) |
| Net of amortization                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 167             |     | 193             |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   | 83 | 125 | 16 | 44 | 0 | 0 | 68 | 24 |
| Amortization of Intangible Assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 29              |     | 27              |     | 27     |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| **Estimated amortization expense:**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |            |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| 2012                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 26              |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| 2013                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 25              |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| 2014                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 24              |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| 2015                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 19              |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
| 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | $ 18            |     |            |     |   |     |   |   |     |   |     |   |     |   |     |   |  |   |  |   |  |   |  |   |  |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| [1]Adjustments to goodwill primarily result from the tax benefit attributable to the amortization of tax deductible goodwill in excess of goodwill recorded for financial statement purposes as measured in the MWM International (“MWM”) balance sheet immediately after its acquisition in 2005. Goodwill was also reduced in 2008 due to the favorable tax settlement of a Brazilian court case. Goodwill in the Truck segment was reduced in 2009 as a result of an adjustment to our purchase price for WCC as a result of receipt of escrow payments for settlement of a dispute. |

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| - Definition
Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.
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| - Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.
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| - Definition
The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.
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| - Definition
Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.
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| - Definition
The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.
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| - Definition
The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.
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| - Definition
The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.
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| - Definition
The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.
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| - Definition
The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.
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| - Definition
The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.
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| - Definition
Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.
+ References
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| - Definition
Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.
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| - Definition
Other increases or decreases during the reporting period in the carrying value of goodwill that are not separately disclosed.
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| - Definition
The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.
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| - Definition
Sum of the carrying amounts (original costs for current and prior period additions adjusted for impairment, if any) as of the balance sheet date of intangible assets, excluding goodwill, having a projected indefinite period of benefit.
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The amount the entity has committed to make for future royalty guarantees.
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