Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income (loss)	$ (217)	$ 90	$ 41	$ 691
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	76	33	(24)	100
Cumulative translation adjustments	63	67	(100)	36
Pension and other postretirement benefit plans	141	106	283	247
Derivative instruments	24	(204)	(138)	(279)
Total other comprehensive income	304	2	21	104
Comprehensive income	87	92	62	795
Comprehensive income attributable to noncontrolling interests, net of tax	8	21	27	72
Comprehensive income attributable to The Dow Chemical Company	79	71	35	723
The Dow Chemical Company [Domain]
Net income (loss)	(217)	217	41	818
Other comprehensive income (loss), net of tax
Unrealized gains (losses) on investments	76	33	(24)	100
Cumulative translation adjustments	63	67	(100)	36
Pension and other postretirement benefit plans	141	106	283	247
Derivative instruments	24	(204)	(138)	(279)
Total other comprehensive income	304	2	21	104
Comprehensive income	87	219	62	922
Comprehensive income attributable to noncontrolling interests, net of tax	8	21	27	72
Comprehensive income attributable to The Dow Chemical Company	$ 79	$ 198	$ 35	$ 850