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THE SPIN-OFF AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Nov. 30, 2014
Basis of Presentation Abstract    
Debt 6,360us-gaap_LongTermDebt  
Pre-tax interest expense 72us-gaap_InterestAndDebtExpense  
Pro-forma basis    
Pre-tax interest expense 314crc_ProFormaPreTaxInterestExpense  
After-tax interest expense 186crc_ProFormaAfterTaxInterestExpense  
Spinoff - CRC | Occidental Petroleum And Subsidiaries    
Separation and Spin Off Transactions    
Percentage of outstanding shares of common stock retained by Occidental   18.50%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= crc_OccidentalPetroleumAndSubsidiariesMember
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_SpinoffMember
Number of months from spin off date for divestment of common stock 18 months