| **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)        2013 2012 2011Equipment on operating leases, at cost $5,111 $4,410 $4,082Less: Accumulated depreciation (1,581) (1,451) (1,471)Equipment on operating leases, net $3,530 $2,959 $2,611        |
| Schedule of minimum rental payments to be received for equipment leased to others | At December 31, 2013, scheduled minimum rental payments for operating leases were as follows: 2014 2015 2016 2017 2018 Thereafter Total$874 $597 $359 $179 $88 $33 $2,130                                                                                                                                                                                                                                  |

| X                                                                                                                                                                                                                                                                                                                                                                                             |
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| - Definition
This element represents the schedule of minimum rental payments to be received for equipment leased to others.
+ References
No definition available.
+ Details**Name:**cfsc_ScheduleOfFutureMinimumRentalPaymentsToBeReceivedForEquipmentLeasedToOthersTableTextBlock**Namespace Prefix:**cfsc_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                  |
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| - Details**Name:**us-gaap_LeasesAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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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
+ Details**Name:**us-gaap_ScheduleOfPropertySubjectToOrAvailableForOperatingLeaseTextBlock**Namespace Prefix:**us-gaap_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |