Dow Inc. Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 660	$ 4,640	$ 6,405
Other comprehensive income (loss), net of tax
Unrealized losses on investments	0	(312)	(45)
Cumulative translation adjustments	43	(579)	(425)
Pension and other postretirement benefit plans	(609)	2,457	2,225
Derivative instruments	24	272	123
Total other comprehensive income (loss)	(542)	1,838	1,878
Comprehensive income	118	6,478	8,283
Comprehensive income attributable to noncontrolling interests, net of tax	71	58	94
Comprehensive income attributable to Dow Inc.	$ 47	$ 6,420	$ 8,189