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DEBT - 2014 Revolving Credit Facility (Details)	1 Months Ended
	Sep. 30, 2014 USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 900,000,000
2014 Revolving Credit Facility (Shared First Priority Lien)
Debt Instrument [Line Items]
Maximum borrowing capacity	1,000,000,000
Increase to maximum borrowing capacity with lender approval	50,000,000
Borrowing base	$ 1,200,000,000
Commitment fees on unused portion of the revolving credit facility	0.50%
2014 Revolving Credit Facility (Shared First Priority Lien) | LIBOR | Minimum
Debt Instrument [Line Items]
Interest rate added to variable rate basis	3.25%
2014 Revolving Credit Facility (Shared First Priority Lien) | LIBOR | Maximum
Debt Instrument [Line Items]
Interest rate added to variable rate basis	4.00%
2014 Revolving Credit Facility (Shared First Priority Lien) | Applicable margin on Alternate Base Rate loans | Minimum
Debt Instrument [Line Items]
Interest rate added to variable rate basis	2.25%
2014 Revolving Credit Facility (Shared First Priority Lien) | Applicable margin on Alternate Base Rate loans | Maximum
Debt Instrument [Line Items]
Interest rate added to variable rate basis	3.00%
2014 Revolving Credit Facility (Shared First Priority Lien) | Letters of Credit
Debt Instrument [Line Items]
Maximum sub-limit on borrowing capacity for issuance of letters of credit	$ 400,000,000

X

- Definition

The amount of money that maybe borrowed based on the value of the collateral the entity pledges.

+ References

No definition available.

+ Details

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

X

- Definition

Increase to maximum borrowing capacity under the credit facility if any one or more of the existing or new lenders agree to provide such increased commitment amount.

+ References

No definition available.

+ Details

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

X

- Definition

Maximum borrowing capacity of letters of credit as sub-limit of the main credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=crc_DebtInstrumentVariableRateBaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: