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FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured on a Non-Recurring Basis, Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impairment of long-lived assets | $ 8 |  |
Held For Sale |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impairment of long-lived assets |  | $ 5 | $ 114
Held For Sale | Certain Products For Disposal, September 2019 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impairment of long-lived assets | 8 |  |
Non-recurring basis |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Non-current assets held for sale | $ 39 | $ 0 |

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