| **Concentration of Credit Risk**       | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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| **Risks and Uncertainties [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Concentration of Credit Risk           | CONCENTRATION OF CREDIT RISK Financial instruments with potential credit risk consist primarily of finance receivables.  Additionally, to a lesser extent, we have potential credit risk associated with counterparties to derivative contracts.  As of December 31, 2017 and 2016, receivables from customers in construction-related industries made up approximately one-third of our total portfolio of which customers in North America were approximately 60 percent.  No single customer or dealer represented a significant concentration of credit risk.  We typically maintain a security interest in retail financed equipment and in some instances, wholesale financed equipment.  We also require physical damage insurance coverage on all financed equipment.  See Note 16 for further information concerning business segments. For derivative contracts, collateral is generally not required of the counterparties or of us.  We enter into International Swaps and Derivatives Association (ISDA) master netting agreements that permit the net settlement of amounts owed under their respective derivative contracts.  Our exposure to credit loss in the event of nonperformance by the counterparties is limited to only those gains that we have recorded, but for which we have not yet received cash payment.  The master netting agreements reduce the amount of loss the company would incur should the counterparties fail to meet their obligations.  At December 31, 2017 and 2016, the maximum exposure to credit loss, was $22 million and $72 million, respectively, before the application of any master netting agreements.  See Note 9 for further information concerning derivatives. |

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| - Definition
The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479
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| - References
No definition available.
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