Represents the Asset Coverage Ratio under credit facility agreement.

No definition available.

Name:	crc_DebtInstrumentCovenantAssetCoverageRatio
Namespace Prefix:	crc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The outstanding amount of certain notes that triggers the acceleration of the maturity of debt instrument under a credit agreement.

+ References

No definition available.

+ Details

Name:	crc_DebtInstrumentCovenantOutstandingAmountMaturityTrigger
Namespace Prefix:	crc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period before maturity of the second debt that triggers accelerated payment when the first debt matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

+ References

No definition available.

+ Details

Name:	crc_PeriodBeforeMaturityOfSecondDebtMaturityOfFirstDebtThatTriggersAcceleratedPayment
Namespace Prefix:	crc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=crc_SecuredFirstLienSecondOutCreditAgreement2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	crc_PeriodCoveredByCovenantAgreementAxis=crc_AsOfJuneAndDecemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT - 2017 Credit Agreements (Details) $ in Millions	1 Months Ended
DEBT - 2017 Credit Agreements (Details) $ in Millions	Nov. 30, 2017 USD ($)	Dec. 31, 2020 USD ($)	Oct. 31, 2020 USD ($)
Debt Instrument [Line Items]
Debt amount		$ 597	$ 723
2017 Credit Agreement
Debt Instrument [Line Items]
Period before maturity of the 2016 Credit Agreement that triggers accelerated payment	91 days
Outstanding amount of 2016 Credit Agreement notes that triggers accelerated payment	$ 100
2017 Credit Agreement \| Any June 30 and December 31
Debt Instrument [Line Items]
Minimum asset coverage ratio	1.20
Line of Credit \| 2017 Credit Agreement
Debt Instrument [Line Items]
Debt amount	$ 1,300