| **CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDER'S EQUITY (USD $)In Millions, unless otherwise specified** | Total   | Common stock [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Accumulated other comprehensive income [Member] | Noncontrolling interests [Member] | Comprehensive income (loss) [Member] |
|---------------------------------------------------------------------------------------------------------------|---------|-----------------------|-------------------------------------|----------------------------|-------------------------------------------------|-----------------------------------|--------------------------------------|
| Balance at Dec. 31, 2008                                                                                      | $ 3,572 | $ 745                 | $ 0                                 | $ 2,803                    | $ (37)                                          | $ 61                              |                                 |
| Profit of Consolidated Companies                                                                              | 275     |                  |                                | 259                        |                                            | 16                                | 275                                  |
| Dividend paid to Cat Inc.                                                                                     | 0       |                  |                                |                       |                                            |                              |                                 |
| Foreign currency transalation, net of tax                                                                     | 269     |                  |                                |                       | 268                                             | 1                                 | 269                                  |
| Change in ownership for noncontrolling interests                                                              | (6)     |                  | 2                                   |                       |                                            | (8)                               | 0                                    |
| **Derivative financial instruments**                                                                          |    |                  |                                |                       |                                            |                              |                                 |
| Derivative financial instruments: Gains (losses) deferred, net of tax                                         | (26)    |                  |                                |                       | (26)                                            |                              | (26)                                 |
| Derivative financial instruments: (Gains) losses reclassified to earnings, net of tax                         | 55      |                  |                                |                       | 55                                              |                              | 55                                   |
| **Retained interests**                                                                                        |    |                  |                                |                       |                                            |                              |                                 |
| Retained interests: Gains (losses) deferred, net of tax                                                       | (16)    |                  |                                |                       | (16)                                            |                              | (16)                                 |
| Retained interests: (Gains) losses reclassified to earnings, net of tax                                       | 20      |                  |                                |                       | 20                                              |                              | 20                                   |
| Balance at Dec. 31, 2009                                                                                      | 4,143   | 745                   | 2                                   | 3,062                      | 264                                             | 70                                | 577                                  |
| Adjustment to adopt consolidation of variable-interest entities                                               | (3)     |                  |                                | (6)                        | 3                                               | 0                                 |                                 |
| Profit of Consolidated Companies                                                                              | 289     |                  |                                | 278                        |                                            | 11                                | 289                                  |
| Dividend paid to Cat Inc.                                                                                     | (600)   |                  |                                | (600)                      |                                            |                              | 0                                    |
| Foreign currency transalation, net of tax                                                                     | (75)    |                  |                                |                       | (77)                                            | 2                                 | (75)                                 |
| **Derivative financial instruments**                                                                          |    |                  |                                |                       |                                            |                              |                                 |
| Derivative financial instruments: Gains (losses) deferred, net of tax                                         | (6)     |                  |                                |                       | (6)                                             |                              | (6)                                  |
| Derivative financial instruments: (Gains) losses reclassified to earnings, net of tax                         | 33      |                  |                                |                       | 33                                              |                              | 33                                   |
| Balance at Dec. 31, 2010                                                                                      | 3,781   | 745                   | 2                                   | 2,734                      | 217                                             | 83                                | 241                                  |
| Profit of Consolidated Companies                                                                              | 393     |                  |                                | 378                        |                                            | 15                                | 393                                  |
| Dividend paid to Cat Inc.                                                                                     | (600)   |                  |                                | (600)                      |                                            |                              | 0                                    |
| Foreign currency transalation, net of tax                                                                     | (105)   |                  |                                |                       | (109)                                           | 4                                 | (105)                                |
| Change in ownership for noncontrolling interests                                                              | (7)     |                  |                                |                       |                                            | (7)                               | 0                                    |
| **Derivative financial instruments**                                                                          |    |                  |                                |                       |                                            |                              |                                 |
| Derivative financial instruments: Gains (losses) deferred, net of tax                                         | (1)     |                  |                                |                       | (1)                                             |                              | (1)                                  |
| Derivative financial instruments: (Gains) losses reclassified to earnings, net of tax                         | 9       |                  |                                |                       | 9                                               |                              | 9                                    |
| Balance at Dec. 31, 2011                                                                                      | $ 3,470 | $ 745                 | $ 2                                 | $ 2,512                    | $ 116                                           | $ 95                              | $ 296                                |

| X                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Cumulative effect of initial adoption of consolidation of variable-interest entities guidance on retained earnings and accumulated other comprehensive income, net of tax.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Increase or decrease in noncontrolling interest balances due to change in ownership for noncontrolling interest
+ References
No definition available.
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| X                                                                                                                                               |
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| X                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Change in accumulated gains and losses from retained interest, net of tax effect.
+ References
No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Net of tax effect of the reclassification adjustment for accumulated gains and losses from retained interests included in accumulated comprehensive income that was realized in net income during the period.
+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents disclosure of the total aggregate cash dividends paid to the entity by consolidated subsidiaries, by unconsolidated subsidiaries, and by 50% or less owned persons accounted for using the equity method.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. The after tax effect change includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity.
+ References
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