XML 149 R121.htm IDEA: XBRL DOCUMENT
v3.20.4

PENSION AND POSTRETIREMENT BENEFIT PLANS - Defined Contribution Plans (Details) - USD ($) $ in Millions | 2 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2020 | Oct. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Retirement Benefits [Abstract] |  |  |  |
Other long-term liabilities for the supplemental retirement plan | $ 35 |  | $ 37 |
Expenses under provisions of defined contribution and supplemental plans | $ 28 | $ 4 | $ 36 | $ 35

X
- Definition Defined Contribution Plan And Supplemental Plan, Cost + References No definition available. + Details
Name: | crc_DefinedContributionPlanAndSupplementalPlanCost
Namespace Prefix: | crc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the accrued liabilities for supplemental retirement benefit plan which provides restoration of benefit lost due to government limitations on qualified retirement benefits. + References No definition available. + Details
Name: | crc_SupplementalRetirementPlanSupplementalRetirementPlanAccruedLiabilities
Namespace Prefix: | crc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration