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

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- Definition Represents the total maximum investment commitment in the joint venture. + References No definition available. + Details
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Namespace Prefix: | crc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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

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

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