The duration required to bring all employees into single location.

No definition available.

Name:	crc_DurationToBringAllEmployeesIntoSingleLocation
Namespace Prefix:	crc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of employees currently working in particular location.

+ References

No definition available.

+ Details

Name:	crc_NumberOfEmployees
Namespace Prefix:	crc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of different locations in Bakersfield across multiple leases.

+ References

No definition available.

+ Details

Name:	crc_NumberOfLocations
Namespace Prefix:	crc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflows related to purchasing assets other than capital expenditures, including assets acquired as the result of a merger.

+ References

No definition available.

+ Details

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

- Definition

Term of occupying the property by the former owner as a tenant, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	crc_TermOfOccupyingPropertyByFormerOwner
Namespace Prefix:	crc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

Name:	us-gaap_RentalIncomeNonoperating
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

ACQUISITIONS AND DIVESTITURES - Office Building (Details) $ in Millions		9 Months Ended	12 Months Ended
	Apr. 02, 2018 USD ($)	Sep. 30, 2018 USD ($) location employee	Dec. 31, 2018 USD ($)
ACQUISITIONS AND DIVESTITURES
Acquisition cost		$ 514.0
Number of employees in Bakersfield \| employee		500
Number of different locations in Bakersfield \| location		8
Amount allocated to in-place leases	$ 6.0
Minimum
ACQUISITIONS AND DIVESTITURES
Expected period to bring all Bakersfield employees into single location	12 months
Maximum
ACQUISITIONS AND DIVESTITURES
Expected period to bring all Bakersfield employees into single location	15 months
Office building
ACQUISITIONS AND DIVESTITURES
Acquisition cost	$ 48.4
Term of occupying space as a tenant by former owner	8 months
Office building \| Expected
ACQUISITIONS AND DIVESTITURES
Rental income expected			$ 4.0