Dow Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (73)	$ 1,552
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	31	(96)
Cumulative translation adjustments	101	(164)
Pension and other postretirement benefit plans	6	109
Derivative instruments	(64)	332
Total other comprehensive income	74	181
Comprehensive income (loss)	1	1,733
Comprehensive income (loss) attributable to noncontrolling interests, net of tax	20	(17)
Comprehensive income (loss) attributable to Dow Inc.	$ (19)	$ 1,750