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LAWSUITS, CLAIMS, COMMITMENTS AND CONTINGENCIES (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 01, 2023 USD ($) | Oct. 31, 2023 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) party | Dec. 31, 2021 USD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2017 | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Tentative cash tax refund |  |  |  |  |  |  |  | $ 12 | $ 89 |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Potential cash tax |  |  |  |  |  |  |  | 1,400 |  |  |  |
State |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Potential cash tax |  |  |  |  |  |  |  | 28 |  |  |  |
Anadarko |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Tentative cash tax refund |  |  |  |  |  |  |  |  |  |  | $ 881 |
Potential accrued interest |  |  |  |  |  |  |  | 534 |  |  |  |
Alden Leeds |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Number of parties, settled | party |  |  |  | 85 |  |  |  |  |  |  |  |
Environmental remediation costs, released |  |  |  | $ 150 |  |  |  |  |  |  |  |
Arbitration filed by Andes Petroleum Ecuador Ltd |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from settlement |  |  |  |  |  |  |  |  |  |  | $ 1,000 |
Recovery of amount awarded in settlement amount (as a percent) |  |  |  |  |  |  |  |  |  |  | 60.00% |
Percentage of judgment amount claimed |  |  |  |  |  |  |  |  |  | 40.00% |  |
Own economic interest (as a percent) |  |  |  |  |  |  |  |  |  | 60.00% |  |
Amount awarded to other party in litigation |  |  |  |  | $ 558 | $ 391 |  |  |  |  |  |
Litigation settlement interest |  |  | $ 166 |  |  |  |  |  |  |  |  |
Maxus Filed Bankruptcy |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from settlement | $ 350 |  |  |  |  |  |  |  |  |  |  |
Amount awarded from other party in litigation | $ 575 |  |  |  |  |  |  |  |  |  |  |
Gains related to legal settlements |  |  |  |  |  |  | $ 260 | $ 260 |  |  |  |
Maxus Filed Bankruptcy | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from settlement |  | $ 341 |  |  |  |  |  |  |  |  |  |
Tronox Settlement |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits, commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Payments for settlement |  |  |  |  |  |  |  |  |  |  |  | $ 5,200

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