RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
DowDuPont
Related Party Transaction [Line Items]
Dividends declared and paid	$ 0	$ 0	$ 535
The Dow Chemical Company
Related Party Transaction [Line Items]
Dividends declared and paid	0	0	535
The Dow Chemical Company | Dow Inc. [Member]
Related Party Transaction [Line Items]
Dividends declared and paid	$ 3,264	$ 2,233	201
The Dow Chemical Company | DowDuPont
Related Party Transaction [Line Items]
Dividends declared and paid			$ 535