Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income	$ 1,006	$ 258
Other comprehensive income (loss), net of tax
Unrealized losses on investments	(49)	(100)
Cumulative translation adjustments	(253)	(163)
Pension and other postretirement benefit plans	1,134	142
Derivative instruments	110	(162)
Total other comprehensive income (loss)	942	(283)
Comprehensive income (loss)	1,948	(25)
Comprehensive income attributable to noncontrolling interests, net of tax	15	19
Comprehensive income (loss) attributable to The Dow Chemical Company	1,933	(44)
The Dow Chemical Company [Domain]
Net income	998	258
Other comprehensive income (loss), net of tax
Unrealized losses on investments	(49)	(100)
Cumulative translation adjustments	(253)	(163)
Pension and other postretirement benefit plans	1,134	142
Derivative instruments	110	(162)
Total other comprehensive income (loss)	942	(283)
Comprehensive income (loss)	1,940	(25)
Comprehensive income attributable to noncontrolling interests, net of tax	15	19
Comprehensive income (loss) attributable to The Dow Chemical Company	$ 1,925	$ (44)