Maximum borrowing capacity under the committed credit facility with parent entity.

No definition available.

Name:	cfsc_CommittedCreditFacilityWithParentEntity
Namespace Prefix:	cfsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount borrowed under the committed credit facility with parent entity as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	cfsc_CommittedCreditFacilityWithParentEntityAmountOutstanding
Namespace Prefix:	cfsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the denominator for interest coverage ratio used to measure of the number of times an entity could make the interest payments on its debt with its earnings before interest and taxes (EBIT) and before net gain/loss from interest rate derivatives. To calculate the interest coverage ratio, divide by the total interest expense.

+ References

No definition available.

+ Details

Name:	cfsc_InterestCoverageRatioDenominator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the numerator for interest coverage ratio used to measure of the number of times an entity could make the interest payments on its debt with its earnings before interest and taxes (EBIT) and before net gain/loss from interest rate derivatives. To calculate the interest coverage ratio, divide by the total interest expense.

+ References

No definition available.

+ Details

Name:	cfsc_InterestCoverageRatioNumerator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the denominator for the leverage ratio used to measure the entity's ability to meet its financial obligations. The leverage ratio is calculated by dividing the total debt by total equity.

+ References

No definition available.

+ Details

Name:	cfsc_LeverageRatioDenominator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the numerator for the leverage ratio used to measure the entity's ability to meet its financial obligations. The leverage ratio is calculated by dividing the total debt by total equity.

+ References

No definition available.

+ Details

Name:	cfsc_LeverageRatioNumerator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the number of global credit facilities.

+ References

No definition available.

+ Details

Name:	cfsc_LineOfCreditFacilityNumberOfGlobalCreditFacilities
Namespace Prefix:	cfsc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the variable lending agreements with parent entity.

+ References

No definition available.

+ Details

Name:	cfsc_MaximumBorrowingCapacityVariableLendingAgreementsWithParentEntity
Namespace Prefix:	cfsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum lending capacity under variable lending agreements to parent entity.

+ References

No definition available.

+ Details

Name:	cfsc_MaximumLendingCapacityVariableLendingAgreementsToParentEntity
Namespace Prefix:	cfsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the denominator for the leverage ratio permissible under the credit facility.

+ References

No definition available.

+ Details

Name:	cfsc_MaximumLeverageRatioPermissibleUnderCreditFacilityDenominator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the numerator for the leverage ratio permissible under the credit facility.

+ References

No definition available.

+ Details

Name:	cfsc_MaximumLeverageRatioPermissibleUnderCreditFacilityNumerator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the denominator of interest coverage ratio required under the credit facility.

+ References

No definition available.

+ Details

Name:	cfsc_MinimumInterestCoverageRatioRequiredUnderCreditFacilitiesDenominator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the numerator for the interest coverage ratio required under the credit facility.

+ References

No definition available.

+ Details

Name:	cfsc_MinimumInterestCoverageRatioRequiredUnderCreditFacilitiesNumerator
Namespace Prefix:	cfsc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the minimum amount of net worth, as defined in the credit facility agreements, required under the facilities.

+ References

No definition available.

+ Details

Name:	cfsc_MinimumNetWorthRequiredUnderCreditFacility
Namespace Prefix:	cfsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the entity's net worth, as defined in the credit facility agreements, as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	cfsc_NetWorth
Namespace Prefix:	cfsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount for notes payable (written promise to pay), due to related parties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

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-Topic 850

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 17

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Related Parties

-URI http://asc.fasb.org/extlink&oid=16382449

+ Details

Name:	us-gaap_NotesReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=cfsc_A364DayCreditFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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- Details

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Credit Commitments (Details) (USD $)	6 Months Ended	12 Months Ended
Credit Commitments (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility
Number of global credit facilities	3	3
Caterpillar's consolidated net worth	$ 22,230,000,000cfsc_NetWorth	$ 22,230,000,000cfsc_NetWorth
Minimum net worth required under the Credit Facility	9,000,000,000	9,000,000,000
Covenant interest coverage ratio, Numerator		2.19cfsc_InterestCoverageRatioNumerator
Covenant interest coverage ratio, Denominator		1cfsc_InterestCoverageRatioDenominator
Minimum interest coverage ratio, required by the Credit Facility, Numerator		1.15
Minimum interest coverage ratio, required by the Credit Facility, Denominator		1
Leverage Ratio, Numerator	7.79cfsc_LeverageRatioNumerator	7.83cfsc_LeverageRatioNumerator
Leverage Ratio, Denominator	1cfsc_LeverageRatioDenominator	1cfsc_LeverageRatioDenominator
Maximum Leverage Ratio, Permissible Under Credit Facility, Numerator		10
Maximum Leverage Ratio, Permissible Under Credit Facility, Denominator		1
Amount available	10,500,000,000	10,500,000,000
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,310,000,000	2,310,000,000
Maximum lending capacity to Caterpillar, Variable lending agreements	1,290,000,000	1,290,000,000
Notes receivable from Caterpillar	414,000,000us-gaap_NotesReceivableRelatedParties	414,000,000us-gaap_NotesReceivableRelatedParties	345,000,000us-gaap_NotesReceivableRelatedParties	360,000,000us-gaap_NotesReceivableRelatedParties
Notes payable to Caterpillar	1,108,000,000	1,108,000,000	1,118,000,000	208,000,000
Amount available, Committed credit facility extended to Caterpillar	2,000,000,000	2,000,000,000
Amount outstanding, Committed credit facility extended to Caterpillar	0	0
Revolving credit facilities
Line of Credit Facility
Amount outstanding	0	0
Revolving credit facilities \| Cat Financial
Line of Credit Facility
Amount available	7,750,000,000	7,750,000,000
364-day facility
Line of Credit Facility
Amount available	3,150,000,000	3,150,000,000
364-day facility \| Cat Financial
Line of Credit Facility
Amount available	2,330,000,000	2,330,000,000
Four-year facility
Line of Credit Facility
Amount available	2,730,000,000	2,730,000,000
Four-year facility \| Cat Financial
Line of Credit Facility
Amount available	2,010,000,000	2,010,000,000
Five-year facility
Line of Credit Facility
Amount available	4,620,000,000	4,620,000,000
Five-year facility \| Cat Financial
Line of Credit Facility
Amount available	3,410,000,000	3,410,000,000
Credit lines with banks
Line of Credit Facility
Amount available	4,060,000,000	4,060,000,000
Amount outstanding	$ 1,900,000,000	$ 1,900,000,000	$ 2,030,000,000