| **Equipment on Operating Leases (Tables)**                                        | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Leases [Abstract]**                                                             |                                                                                                                                                                                                                                                                                                                                                                                                      |
| Equipment leased to others                                                        | Components of equipment on operating leases, less accumulated depreciation as of December 31, were as follows: (Millions of dollars)      2015 2014Equipment on operating leases, at cost $5,202 $5,273Less: Accumulated depreciation (1,638) (1,649)Equipment on operating leases, net $3,564 $3,624      |
| Schedule of minimum rental payments to be received for equipment leased to others | At December 31, 2015, scheduled minimum rental payments for operating leases were as follows: 2016 2017 2018 2019 2020 Thereafter Total$818 $522 $308 $142 $49 $12 $1,851                                                                                                                                                           |

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| - References
No definition available.
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| - Definition
Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717
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| - Definition
Tabular disclosure of lessor's property under leasing agreements and property available for lease (not currently under lease) by property class, the gross amount, accumulated depreciation and net amount of  as of the balance sheet date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718
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