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JOINT VENTURES - BSP (Details) $ in Millions	Feb. 28, 2017 USD ($)
BSP JV | Joint venture with BSP
Business Acquisition [Line Items]
Maximum commitment contribution	$ 200

X

- Definition

Represents the total maximum investment commitment in the joint venture.

+ References

No definition available.

+ Details

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

X

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

X

- Details

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

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=crc_JointVentureWithBenefitStreetPartnersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: