| **Consolidated Statements of Comprehensive Income - USD ($) $ in Millions**            | 3 Months Ended | 6 Months Ended |
|----------------------------------------------------------------------------------------|----------------|----------------|
||
| **Statement of Comprehensive Income [Abstract]**                                       |           |           |   |   |
| Profit of consolidated companies                                                       | $ 153          | $ 146          | $ 304 | $ 290 |
| **Other comprehensive income (loss), net of tax (Note 5):**                            |           |           |   |   |
| Foreign currency translation                                                           | (41)           | (257)          | 3 | (247) |
| Derivative financial instruments                                                       | (1)            | 7              | 0 | 23 |
| Total Other comprehensive income (loss), net of tax                                    | (42)           | (250)          | 3 | (224) |
| Comprehensive income (loss)                                                            | 111            | (104)          | 307 | 66 |
| Less: Comprehensive income (loss) attributable to noncontrolling interests             | (5)            | (6)            | (1) | (3) |
| Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation | $ 116          | $ (98)         | $ 308 | $ 69 |

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.
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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.
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| - References
No definition available.
+ Details**Name:**us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |