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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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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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