Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss)	$ 1,706	$ (1)	$ 4,644	$ 40
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	(13)	8	(45)	(16)
Cumulative translation adjustments	(157)	91	(345)	(9)
Pension and other postretirement benefit plans	149	147	1,432	430
Derivative instruments	32	38	148	(100)
Other Comprehensive Income (Loss), Net of Tax	11	284	1,190	305
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	1,717	283	5,834	345
Comprehensive income attributable to noncontrolling interests, net of tax	23	24	69	51
Comprehensive income attributable to The Dow Chemical Company	1,694	259	5,765	294
The Dow Chemical Company
Net income (loss)	1,702	(1)	4,645	40
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	(13)	8	(45)	(16)
Cumulative translation adjustments	(157)	91	(345)	(9)
Pension and other postretirement benefit plans	149	147	1,432	430
Derivative instruments	32	38	148	(100)
Other Comprehensive Income (Loss), Net of Tax	11	284	1,190	305
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	1,713	283	5,835	345
Comprehensive income attributable to noncontrolling interests, net of tax	23	24	69	51
Comprehensive income attributable to The Dow Chemical Company	$ 1,690	$ 259	$ 5,766	$ 294