Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ 1,294	$ (1,272)	$ 4,775
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	40	115	(67)
Cumulative translation adjustments	205	(32)	(225)
Pension and other postretirement benefit plans	(778)	(899)	(40)
Derivative instruments	(76)	(338)	75
Total other comprehensive loss	(609)	(1,154)	(257)
Comprehensive income (loss)	685	(2,426)	4,518
Comprehensive income attributable to noncontrolling interests, net of tax	69	99	97
Comprehensive income (loss) attributable to The Dow Chemical Company	616	(2,525)	4,421
The Dow Chemical Company
Net income (loss)	1,304	(1,150)	4,775
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	40	115	(67)
Cumulative translation adjustments	205	(32)	(225)
Pension and other postretirement benefit plans	(778)	(899)	(40)
Derivative instruments	(76)	(338)	75
Total other comprehensive loss	(609)	(1,154)	(257)
Comprehensive income (loss)	695	(2,304)	4,518
Comprehensive income attributable to noncontrolling interests, net of tax	69	99	97
Comprehensive income (loss) attributable to The Dow Chemical Company	$ 626	$ (2,403)	$ 4,421