STOCKHOLDERS' EQUITY (Retained Earnings) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Dividends declared (in dollars per share)	$ 2.80	$ 2.80	$ 2.10
Undistributed Earnings of Nonconsolidated Affiliates	$ 1,155	$ 716
DowDuPont
Dividends declared and paid	0	0	$ 535
The Dow Chemical Company
Dividends declared and paid	0	0	535
The Dow Chemical Company | DowDuPont
Dividends declared and paid			535
The Dow Chemical Company | Dow Inc. [Member]
Dividends declared and paid	$ 3,264	$ 2,233	$ 201