Plan Of Reorganization, Proceeds From Issuance Of Common Stock, Gross

No definition available.

Name:	crc_PlanOfReorganizationProceedsFromIssuanceOfCommonStockGross
Namespace Prefix:	crc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Plan Of Reorganization, Settlement Agreement, Cash Paid

+ References

No definition available.

+ Details

Name:	crc_PlanOfReorganizationSettlementAgreementCashPaid
Namespace Prefix:	crc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Plan Of Reorganization, Settlement Agreement, Percentage Of Common Stock In Exchange For Debt

+ References

No definition available.

+ Details

Name:	crc_PlanOfReorganizationSettlementAgreementPercentageOfCommonStockInExchangeForDebt
Namespace Prefix:	crc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the capacity of gas processing plant.

+ References

No definition available.

+ Details

Name:	crc_PropertyPlantAndEquipmentGasProcessingPlantCapacity
Namespace Prefix:	crc_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the capacity of power plant.

+ References

No definition available.

+ Details

Name:	crc_PropertyPlantAndEquipmentPowerPlantCapacity
Namespace Prefix:	crc_
Data Type:	dtr-types:powerItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Redemption value, as if currently redeemable, of redeemable noncontrolling interest for preferred shares, units or ownership interests classified as temporary equity and the election has been made to accrete changes in redemption value to the earliest redemption date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph 24(b)
-URI https://asc.fasb.org/extlink&oid=122040564&loc=SL6540498-122764

+ Details

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

- Details

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

- Details

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

- Details

Name:	srt_OwnershipAxis=crc_AresJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=crc_EcrCorporateHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=crc_NaturalGasPowerAndGasProcessingPlantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=crc_AresJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

CHAPTER 11 PROCEEDINGS - Ares JV Settlement Agreement and Noncontrolling Interest (Details) $ in Millions			1 Months Ended
	Oct. 31, 2020 USD ($)	Oct. 27, 2020 USD ($)	Feb. 28, 2018 MW MMcf	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Redeemable noncontrolling interest, equity, preferred, redemption value				$ 138.0
EHP Notes
Debt Instrument [Line Items]
Proceeds from common stock issued	$ 17.3	$ 17.3
Cash acquired	$ 2.0	$ 2.0
Percentage of common acquired		20.80%
EHP Notes \| Senior Notes (Unsecured)
Debt Instrument [Line Items]
Debt instrument face amount		$ 300.0
Ares JV \| Class A common interest
Debt Instrument [Line Items]
Percentage of common interest held by CRC			50.00%
Ares JV \| Class A common interest \| ECR
Debt Instrument [Line Items]
Percentage of common interest held by ECR			50.00%
Ares JV \| Class C common interest
Debt Instrument [Line Items]
Percentage of common interest held by CRC			95.25%
Ares JV \| Class C common interest \| ECR
Debt Instrument [Line Items]
Percentage of common interest held by ECR			4.75%
Ares JV \| Class B preferred interest \| ECR
Debt Instrument [Line Items]
Percentage of common interest held by ECR			100.00%
Natural gas power and Gas processing plants \| Ares JV
Debt Instrument [Line Items]
Power plant capacity \| MW			550
Gas processing plant capacity \| MMcf			200