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COMMITMENTS AND CONTINGENCIES (Nova Patent Infringement Matter) (Details) - Dow V. Nova Chemicals Corporation Patent Infringement Matter [Member] $ in Millions, $ in Millions | Jul. 06, 2017 USD ($) | Jun. 29, 2017 CAD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
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Gain Contingencies [Line Items] |  |  |  |
Litigation Settlement, Amount Awarded from Other Party |  | $ 645 |  |
Proceeds from Legal Settlements | $ 501 |  |  |
Estimated Litigation Liability, Current |  |  | $ 341 | $ 341

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