Finance Receivables (Details 6) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Customer
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	$ 184	$ 466
Amortized Cost, Non-accrual Without an Allowance	26	20
Amortized Cost, 91+ Still Accruing	36	49
Interest income recognized for finance receivables on non-accrual status	12	12	$ 28
Customer \| North America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	47	86
Amortized Cost, Non-accrual Without an Allowance	9	1
Amortized Cost, 91+ Still Accruing	12	34
Customer \| EAME
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	18	113
Amortized Cost, Non-accrual Without an Allowance	1	1
Amortized Cost, 91+ Still Accruing	2	1
Customer \| Asia/Pacific
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	19	13
Amortized Cost, Non-accrual Without an Allowance	0	0
Amortized Cost, 91+ Still Accruing	7	13
Customer \| Mining
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	8	21
Amortized Cost, Non-accrual Without an Allowance	1	1
Amortized Cost, 91+ Still Accruing	14	0
Customer \| Latin America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	52	63
Amortized Cost, Non-accrual Without an Allowance	4	0
Amortized Cost, 91+ Still Accruing	1	1
Customer \| Caterpillar Power Finance
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	40	170
Amortized Cost, Non-accrual Without an Allowance	11	17
Amortized Cost, 91+ Still Accruing	0	0
Dealer
Financing Receivable, Past Due
Amortized Cost, 91+ Still Accruing	0	0
Interest income recognized for finance receivables on non-accrual status	0	0	$ 0
Dealer \| Latin America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	$ 78	$ 81

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=124255953&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=124255953&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=123577603&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=124255953&loc=SL82919258-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

+ Details

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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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- 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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