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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Definite-lived Intangible Assets |  |  |  |
Other indefinite-lived intangible assets |  | $ 109,000,000 | $ 76,000,000 |
Increase in other indefinite-lived intangible assets |  | 32,000,000 |  |
Impairment of intangible assets, indefinite-lived (excluding goodwill) |  | 0 | 0 | $ 0
Impairment charge for goodwill |  | 0 | 0 | 0
Carrying value of definite-lived intangible assets |  | 248,000,000 | 183,000,000 |
Accumulated amortization |  | 73,000,000 | 48,000,000 |
Amortization expense related to the definite-lived intangible assets |  | 24,000,000 | $ 23,000,000 | $ 20,000,000
Increase in definite-lived intangible assets |  | 86,000,000 |  |
Amortization expense related to the definite-lived intangible assets, 2021 |  | 27,000,000 |  |
Amortization expense related to the definite-lived intangible assets, 2022 |  | 23,000,000 |  |
Amortization expense related to the definite-lived intangible assets, 2023 |  | 22,000,000 |  |
Amortization expense related to the definite-lived intangible assets, 2024 |  | 22,000,000 |  |
Amortization expense related to the definite-lived intangible assets, 2025 |  | $ 17,000,000 |  |
Weighted average |  |  |  |
Definite-lived Intangible Assets |  |  |  |
Weighted average amortization period |  | 15 years | 17 years |
Decorative Architectural Products |  |  |  |
Definite-lived Intangible Assets |  |  |  |
Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 9,000,000 |  |  |

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