Dow Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 501	$ 1,681	$ 428	$ 3,233
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	61	(153)	92	(249)
Cumulative translation adjustments	(103)	(514)	(2)	(678)
Pension and other postretirement benefit plans	(4)	122	2	231
Derivative instruments	44	137	(20)	469
Total other comprehensive income (loss)	(2)	(408)	72	(227)
Comprehensive income	499	1,273	500	3,006
Comprehensive income attributable to noncontrolling interests, net of tax	16	20	36	3
Comprehensive income (loss) attributable to Dow Inc.	$ 483	$ 1,253	$ 464	$ 3,003