Dow Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,681	$ 1,932	$ 3,233	$ 2,938
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	(153)	17	(249)	(32)
Cumulative translation adjustments	(514)	65	(678)	(188)
Pension and other postretirement benefit plans	122	149	231	1,283
Derivative instruments	137	6	469	116
Total other comprehensive income (loss)	(408)	237	(227)	1,179
Comprehensive income	1,273	2,169	3,006	4,117
Comprehensive income attributable to noncontrolling interests, net of tax	20	31	3	46
Comprehensive income attributable to Dow Inc.	$ 1,253	$ 2,138	$ 3,003	$ 4,071