GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2020 USD ($) site	Jun. 30, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	$ 944
Number of intangible assets impaired | site	2
Other
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	$ 43
Weighted average useful life		45 years
Insulation | Trade name
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	34
Indefinite-lived intangible assets		$ 168
Insulation | Trademarks
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	$ 9