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ASSET IMPAIRMENTS AND RESTRUCTURING (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | $ 39 | $ 1 | $ 9
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  |  |  |  |  | 0 | 1 | 12
Gain on sale of assets, net |  |  |  |  |  |  |  |  | 0 | 0 | (2)
Intangible asset and goodwill impairments |  |  |  |  |  |  |  |  | 39 | 0 | 0
Severance charges |  |  |  |  |  |  |  |  | 6 | 6 | 32
Site closure and restructuring charges |  |  |  |  |  |  |  |  | 0 | 1 | 3
Asset impairments and restructuring charges, net | $ 39 | $ 0 | $ 4 | $ 2 | $ 8 | $ 0 | $ 0 | $ 0 | 45 | 8 | 45
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 29 |  |  |  | 55 | 29 | 55 | 66
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  | 45 | 8 | 45
Non-cash Reductions |  |  |  |  |  |  |  |  | (38) | 0 | (8)
Cash Reductions |  |  |  |  |  |  |  |  | (22) | (34) | (48)
Balance at End of Period | 14 |  |  |  | 29 |  |  |  | 14 | 29 | 55
Non-Cash Charges [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 0 |  |  |  | 0 | 0 | 0 | 0
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 39 | 1 | 12
Non-cash Reductions |  |  |  |  |  |  |  |  | (39) | (1) | (12)
Cash Reductions |  |  |  |  |  |  |  |  | 0 | 0 | 0
Balance at End of Period | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges |  |  |  |  |  |  |  |  |  | 5 |
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Asset impairments and restructuring charges, net |  |  |  |  |  |  |  |  | 6 |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 19 |  |  |  | 42 | 19 | 42 | 55
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 6 | 6 | 32
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | 1 | 0 | 0
Cash Reductions |  |  |  |  |  |  |  |  | (20) | (29) | (45)
Balance at End of Period | 6 |  |  |  | 19 |  |  |  | 6 | 19 | 42
Site Closure and Restructuring Costs [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | $ 10 |  |  |  | $ 13 | 10 | 13 | 11
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 0 | 1 | 1
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | 0 | 1 | 4
Cash Reductions |  |  |  |  |  |  |  |  | (2) | (5) | (3)
Balance at End of Period | $ 8 |  |  |  | $ 10 |  |  |  | 8 | 10 | 13
Additives And Functional Products [Member] | Goodwill [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | 38 |  |
Advanced Materials [Member] | Indefinite-lived Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | $ 1 |  |
Capital Project Impairment [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  |  | 12
2016 Reduction in Force [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges |  |  |  |  |  |  |  |  |  |  | 35
Crystex R&D facility in France [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Properties |  |  |  |  |  |  |  |  |  |  | $ 2
China Site Closure [Member] | Additives And Functional Products [Member] | Site Closure and Restructuring Costs [Member] |  |  |  |  |  |  |  |  |  |  |
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Asset impairments and restructuring charges, net |  |  |  |  |  |  |  |  |  | $ 3 |

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