Finance Receivables (Details 7) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Customer
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	$ 729	$ 729
Amortized Cost, Non-accrual Without an Allowance	25	25
91 Plus, Still Accruing	49	49	$ 29
Interest income recognized for finance receivables on non-accrual status	1	5
Recorded Investment, Non-accrual Finance Receivables			727
Customer \| North America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	78	78
Amortized Cost, Non-accrual Without an Allowance	1	1
91 Plus, Still Accruing	30	30	15
Recorded Investment, Non-accrual Finance Receivables			44
Customer \| EAME
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	168	168
Amortized Cost, Non-accrual Without an Allowance	0	0
91 Plus, Still Accruing	5	5	4
Recorded Investment, Non-accrual Finance Receivables			165
Customer \| Asia/Pacific
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	32	32
Amortized Cost, Non-accrual Without an Allowance	0	0
91 Plus, Still Accruing	12	12	8
Recorded Investment, Non-accrual Finance Receivables			21
Customer \| Mining
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	43	43
Amortized Cost, Non-accrual Without an Allowance	0	0
91 Plus, Still Accruing	0	0	0
Recorded Investment, Non-accrual Finance Receivables			47
Customer \| Latin America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	106	106
Amortized Cost, Non-accrual Without an Allowance	3	3
91 Plus, Still Accruing	2	2	2
Recorded Investment, Non-accrual Finance Receivables			89
Customer \| Caterpillar Power Finance
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	302	302
Amortized Cost, Non-accrual Without an Allowance	21	21
91 Plus, Still Accruing	0	0	0
Recorded Investment, Non-accrual Finance Receivables			361
Dealer
Financing Receivable, Past Due
91 Plus, Still Accruing	0	0
Interest income recognized for finance receivables on non-accrual status	0
Dealer \| Latin America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	$ 78	$ 78
Recorded Investment, Non-accrual Finance Receivables			$ 78

Financing receivables that are 91 days or more past due and still accruing.

No definition available.

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

- Definition

Amount of interest income on financing receivable on nonaccrual status.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447

+ Details

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

- Definition

Amount of financing receivable on nonaccrual status with no allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447

+ Details

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

- Definition

Amount of financing receivable on nonaccrual status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which interest is continuing to be earned or accrued.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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