| **Commitments and Contingent Liabilities**              | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
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| **Commitments and Contingencies Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Commitments and Contingent Liabilities                  | Commitments and Contingent Liabilities GuaranteesWe provide credit guarantees and residual value guarantees to third parties for financing and leasing associated with Caterpillar machinery. In addition, we provide standby letters of credit issued to third parties on behalf of our customers. These guarantees and standby letters of credit have varying terms and beneficiaries and are generally secured by customer assets.No significant loss has been experienced or is anticipated under any of these guarantees. At September 30, 2024 and December 31, 2023, the related recorded liability was less than $1 million. The maximum potential amount of future payments (undiscounted and without reduction for any amounts that may possibly be recovered under recourse or collateralized provisions) we could be required to make under the guarantees was $24 million and $25 million at September 30, 2024 and December 31, 2023, respectively.We provide guarantees to purchase certain loans of Caterpillar dealers from an SPC that qualifies as a VIE. We receive a fee for providing this guarantee. The purpose of the SPC is to provide short-term working capital loans to Caterpillar dealers. This SPC issues commercial paper and uses the proceeds to fund its loan program. We are the primary beneficiary of the SPC as our guarantees result in us having both the power to direct the activities that most significantly impact the SPC’s economic performance and the obligation to absorb losses and therefore we have consolidated the financial statements of the SPC. As of September 30, 2024 and December 31, 2023, the SPC’s assets of $1.31 billion and $1.35 billion, respectively, were primarily comprised of loans to dealers, which are included in Finance receivables, net in the Consolidated Statements of Financial Position, and the SPC’s liabilities of $1.31 billion and $1.35 billion, respectively, were primarily comprised of commercial paper, which is included in Short-term borrowings in the Consolidated Statements of Financial Position. The assets of the SPC are not available to pay our creditors. We may be obligated to perform under the guarantee if the SPC experiences losses. No loss has been experienced or is anticipated under this loan purchase agreement.Litigation and claimsWe are involved in unresolved legal actions that arise in the normal course of business. The aggregate range of reasonably possible losses in excess of accrued liabilities, if any, associated with these unresolved legal actions is not material. In some cases, we cannot reasonably estimate a range of loss because there is insufficient information regarding the matter. However, we believe there is no more than a remote chance that any liability arising from these matters would be material. Although it is not possible to predict with certainty the outcome of these unresolved legal actions, we believe that these actions will not individually or in the aggregate have a material adverse effect on our consolidated results of operations, financial position or liquidity. |

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| - Definition
The entire disclosure for commitments and contingencies.
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