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

Represents the increase in annual interest expense due to 1/8 percent change in variable interest rate of debt during the period.

No definition available.

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

Net carrying value of long term debt including current maturities.

No definition available.

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

Represents the percentage of change in variable interest rate of debt during the period.

No definition available.

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

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

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

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.