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COMMITMENTS AND CONTINGENCIES Nova Ethylene Asset Matter (Details) - Nova Ethylene Asset Matter [Member] $ in Millions, $ in Millions | Sep. 18, 2019 CAD ($) | Sep. 18, 2019 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Gain Contingencies [Line Items] |  |  |  |
Litigation Settlement, Amount Awarded from Other Party | $ 1,430 | $ 1,080 |  |
Estimated Litigation Liability, Noncurrent |  |  | $ 323 | $ 323

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