Dow Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 760	$ 1,706	$ 3,993	$ 4,644
Other comprehensive income (loss), net of tax
Unrealized losses on investments	(122)	(13)	(371)	(45)
Cumulative translation adjustments	(403)	(157)	(1,081)	(345)
Pension and other postretirement benefit plans	125	149	356	1,432
Derivative instruments	22	32	491	148
Total other comprehensive income (loss)	(378)	11	(605)	1,190
Comprehensive income	382	1,717	3,388	5,834
Comprehensive income attributable to noncontrolling interests, net of tax	21	23	24	69
Comprehensive income attributable to Dow Inc.	$ 361	$ 1,694	$ 3,364	$ 5,765