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ASSET IMPAIRMENTS AND RESTRUCTURING (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | $ 146 | $ 72 | $ 39
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  |  |  |  | 21 | 27 | 0
Impairment of Intangible Assets (Excluding Goodwill) |  |  |  |  |  |  |  |  | 125 | 45 | 39
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 45 |
Severance Costs |  |  |  |  |  |  |  |  | 65 | 45 | 6
Business Exit Costs |  |  |  |  |  |  |  |  | 16 | 9 | 0
Asset impairments and restructuring charges, net | $ 12 | $ 60 | $ 141 | $ 14 | $ 74 | $ 2 | $ 18 | $ 32 | 227 | 126 | 45
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 28 |  |  |  | 14 | 28 | 14 | 29
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  | 227 | 126 | 45
Non-cash Reductions |  |  |  |  |  |  |  |  | (144) | (71) | (38)
Cash Reductions |  |  |  |  |  |  |  |  | (32) | (41) | (22)
Balance at End of Period | 79 |  |  |  | 28 |  |  |  | 79 | 28 | 14
Non-Cash Charges [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 0 |  |  |  | 0 | 0 | 0 | 0
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 145 | 72 | 39
Non-cash Reductions |  |  |  |  |  |  |  |  | (145) | (72) | (39)
Cash Reductions |  |  |  |  |  |  |  |  | 0 | 0 | 0
Balance at End of Period | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 17 |  |  |  | 6 | 17 | 6 | 19
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 65 | 45 | 6
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | 1 | 0 | 1
Cash Reductions |  |  |  |  |  |  |  |  | (18) | (34) | (20)
Balance at End of Period | 65 |  |  |  | 17 |  |  |  | 65 | 17 | 6
Site Closure and Restructuring Costs [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | $ 11 |  |  |  | $ 8 | 11 | 8 | 10
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 17 | 9 | 0
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | 0 | 1 | 0
Cash Reductions |  |  |  |  |  |  |  |  | (14) | (7) | (2)
Balance at End of Period | 14 |  |  |  | $ 11 |  |  |  | 14 | 11 | 8
Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  | 0 | 45 | 38
Additives And Functional Products [Member] | Trade Names |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill) |  |  |  |  |  |  |  |  | 123 | 0 | 0
Additives And Functional Products [Member] | Customer-Related Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill) |  |  |  |  |  |  |  |  | 2 | 0 | 0
Advanced Materials [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 0 |
Advanced Materials [Member] | Customer-Related Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill) |  |  |  |  |  |  |  |  | 0 | 0 | 1
Chemical Intermediates [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 0 |
Capital Project AFP [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  | 0 | 4 | 0
Site Closure Tire Additives Asia Pacific Tire Additives [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  |  |  |  | 5 | 0 | 0
Severance Costs |  |  |  |  |  |  |  |  | 3 | 0 | 0
Site Closure Performance Films North America 2020 [Member] | Advanced Materials [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  |  |  |  | 5 | 0 | 0
Severance Costs |  |  |  |  |  |  |  |  | 3 | 0 | 0
Site Closure Animal Nutrition Asia Pacific [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  |  |  |  | 3 | 0 | 0
Severance Costs |  |  |  |  |  |  |  |  | 1 | 0 | 0
Other Restructuring Costs |  |  |  |  |  |  |  |  | (2) | 0 | 0
Polyester Based Fibers [Member] | Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  |  |  |  | 8 | 0 | 0
Other Restructuring Costs |  |  |  |  |  |  |  |  | 4 | 0 | 0
Site Closure Advanced Interlayers North America 2020 [Member] | Advanced Materials [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  |  |  | 5 | 0 | 0
Restructuring and Related Cost, Expected Cost | 30 |  |  |  |  |  |  |  | 30 |  |
Restructuring and Related Cost, Accelerated Depreciation |  |  |  |  |  |  |  |  | 8 |  |
Site Closure Singapore 2019 [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | 0 | 27 | 0
Severance Costs |  |  |  |  |  |  |  |  | 6 | 0 | 0
Restructuring and Related Cost, Expected Cost | $ 50 |  |  |  |  |  |  |  | 50 |  |
Site Closure Singapore 2019 [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  | 5 |
Severance Costs |  |  |  |  |  |  |  |  | 1 |  |
Site Closure Singapore 2019 [Member] | Chemical Intermediates [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  | 22 |
Severance Costs |  |  |  |  |  |  |  |  | 5 |  |
Corporate Cost Actions [Member] | Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  |  |  | 47 | 45 | 6
Other Restructuring Costs |  |  |  |  |  |  |  |  | $ 14 | $ 5 | $ 0

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