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DEBT - Revolving Credit Facility Narrative (Details) |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |
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Aug. 22, 2024 USD ($) | Jun. 05, 2024 USD ($) | Apr. 26, 2023 | Jan. 20, 2021 USD ($) | Oct. 27, 2020 | Jan. 20, 2021 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Nov. 01, 2024 USD ($) | Oct. 31, 2024 USD ($) | Jul. 01, 2024 USD ($) | Jun. 30, 2024 USD ($) | Apr. 29, 2022
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  |  | $ 5,000,000 | $ 1,000,000 | $ 0 |  |  |  |  |
Repayments of assumed debt |  | $ 990,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Unamortized premium |  |  |  |  |  |  | $ 3,000,000 | 0 |  |  |  |  |  |
Senior Notes (Unsecured) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  | $ 2,000,000 |  |  |  | $ 1,000,000 |  |  |  |  |  |
Senior Notes (Unsecured) | 7.125% Unsecured Debt Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 7.125% |  | 7.125% |  |  |  |  |  |  |  |
Net proceeds from issuance of senior notes used to make cash distribution to occidental |  |  |  | $ 587,000,000 |  |  |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  |  | 13,000,000 |  | $ 13,000,000 |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed in case of change control |  |  |  |  |  | 101.00% |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 7.125% Unsecured Debt Notes | After the Second Anniversary Date, Before Third Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  |  |  |  |  | 102.00% |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 7.125% Unsecured Debt Notes | After the Third Anniversary Date, Before Fourth Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | Second Lien Term Loan, EHP Notes, And Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | 587,000,000 |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount | $ 300,000,000 | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 8.25% |  |  |  |  | 8.25% |  |  |  |  |  |  |
Net proceeds from issuance of senior notes used to make cash distribution to occidental | 298,000,000 | $ 590,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs, net | 5,000,000 | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Unamortized premium | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes | After the Second Anniversary Date, Before Third Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  | 108.25% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes | After the Third Anniversary Date, Before Fourth Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes | Prior to 90 Days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  | 104.125% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes | After 90 Days, Before First Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  | 102.063% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes | After the First Anniversary Date, Before Second Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2029 Senior Notes | Fifth Year |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  | 101.00% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2026 Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  | $ 600,000,000 |  | $ 600,000,000 |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  |  |  |  | 7.125% |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2026 Senior Notes | Prior to 90 Days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  |  |  | 102.00% |  |  |  |  |  |  |  |  |  |
Senior Notes (Unsecured) | 2026 Senior Notes | After 90 Days, Before First Anniversary Date |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount at which notes can be redeemed prior to their maturity date |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | 1,150,000,000 |  |  |  |  | $ 1,100,000,000 | $ 630,000,000 |
Line of credit facility, amount available for borrowing |  |  |  |  |  |  | $ 983,000,000 |  |  |  |  |  |  |
Borrowing base |  |  |  |  |  |  |  |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 | $ 1,200,000,000 |
Period to enter into hedges on production |  |  |  |  |  |  | 60 months |  |  |  |  |  |  |
Debt instrument, covenant leverage ratio |  |  | 2.5 |  | 3.00 |  |  |  |  |  |  |  |  | 1.75
Derivative, hedging percent |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00%
Commitment fee percentage |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |
Line of credit facility, commitment fee amount, writeoff |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |
Line of credit facility, accordion feature, increase limit |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |
Line of credit facility, accordion feature, higher borrowing capacity option |  |  |  |  |  |  |  |  |  | $ 1,150,000,000 |  |  |  |
Revolving Credit Facility | Line of Credit | Second Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in debt issuance costs, net |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Fourth Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in debt issuance costs, net |  |  |  |  |  |  | 7,000,000 |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Fifth Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in debt issuance costs, net |  |  |  |  |  |  | $ 7,000,000 |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | First 24 Months | Crude Oil Hedge Positions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, hedging percent |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Month 25 Through Month 36 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, hedging percent |  |  |  |  | 33.00% |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Month 25 Through Month 36 | Crude Oil Hedge Positions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, period |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin increase, additional increase each subsequent fiscal quarter |  |  |  |  |  |  | 0.375% |  |  |  |  |  |  |
Debt instrument, covenant leverage ratio |  |  |  |  | 1.5 |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin increase, additional increase each subsequent fiscal quarter |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Debt instrument, covenant leverage ratio |  |  |  |  | 2.0 |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Federal Funds Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to variable rate basis |  |  | 0.50% |  |  |  | 0.50% |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to variable rate basis |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to variable rate basis |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to variable rate basis |  |  |  |  |  |  | 3.50% |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | ABR Applicable Margin | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to variable rate basis |  |  | 1.50% |  |  |  | 1.50% |  |  |  |  |  |  |
Revolving Credit Facility | Line of Credit | ABR Applicable Margin | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to variable rate basis |  |  | 2.50% |  |  |  | 2.50% |  |  |  |  |  |  |
Revolving Credit Facility | 2026 Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, covenant, revolving commitments, minimum |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Letters of Credit | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 300,000,000 |  |  | $ 300,000,000 | $ 250,000,000 |  |  |
Letters of credit outstanding, amount |  |  |  |  |  |  | $ (167,000,000) |  |  |  |  |  |  |
Debt covenant, additional borrowing capacity, multiplier |  |  | 33.33% |  |  |  |  |  |  |  |  |  |  |

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