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NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER - Production - Sharing Type Contracts (Details)	12 Months Ended
	Dec. 31, 2020
Production Sharing Type Contracts
Percentage of production represented by PSC-type contracts	18.00%
Percentage of operating costs reported under PSC-type contracts	100.00%

X

- Definition

The percentage of operating costs reported under PSCs.

+ References

No definition available.

+ Details

Name:	crc_PercentageOfOperatingCostsReportedUnderProductionSharingTypeContracts
Namespace Prefix:	crc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of represented by production sharing type contracts.

+ References

No definition available.

+ Details

Name:	crc_PercentageOfProductionThroughProductionSharingTypeContracts
Namespace Prefix:	crc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	crc_ProductionSharingTypeContractsAbstract
Namespace Prefix:	crc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration