Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss	Unearned ESOP Shares [Member]	Dow Inc. [Member] Retained Earnings [Member]	The Dow Chemical Company	The Dow Chemical Company Common Stock [Member]	The Dow Chemical Company Additional Paid-in Capital [Member]	The Dow Chemical Company Retained Earnings [Member]	The Dow Chemical Company Accumulated Other Comprehensive Loss	The Dow Chemical Company Unearned ESOP Shares [Member]	The Dow Chemical Company Noncontrolling Interests
Total Equity, Beginning at Dec. 31, 2020		$ 8	$ 7,595	$ 16,361	$ (10,855)	$ (49)			$ 0	$ 7,603	$ 16,300	$ (10,855)	$ (49)
Stock Issued										200
Stock-based compensation and allocation of ESOP shares			103			17				103			17
Net income available for The Dow Chemical Company common stockholder	$ 2,877			2,892							2,897
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (1,442)
Other				10							(10)
Other comprehensive income	1,179				1,179			$ 1,179				1,179
Total Equity, Ending at Jun. 30, 2021	16,153	8	7,898	18,200	(9,676)	(32)		16,523	0	7,906	17,745	(9,676)	(32)	$ 580
Total Equity, Beginning at Mar. 31, 2021		8	7,743	16,829	(9,913)	(39)			0	7,751	16,577	(9,913)	(39)
Stock Issued										73
Stock-based compensation and allocation of ESOP shares			82			7				82			7
Net income available for The Dow Chemical Company common stockholder	1,891			1,901							1,914
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							(739)
Other				8							(7)
Other comprehensive income	237				237			237				237
Total Equity, Ending at Jun. 30, 2021	16,153	8	7,898	18,200	(9,676)	(32)		16,523	0	7,906	17,745	(9,676)	(32)	580
The Dow Chemical Company’s stockholders’ equity	15,573							15,943
The Dow Chemical Company’s stockholders’ equity	18,165							18,455
Total Equity, Beginning at Dec. 31, 2021	18,739	8	8,151	20,623	(8,977)	(15)		19,029	0	8,159	19,288	(8,977)	(15)
Stock Issued										97
Stock-based compensation and allocation of ESOP shares			119			15				119			15
Net income available for The Dow Chemical Company common stockholder	3,213			3,230							3,228
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							(2,454)
Other				8							(13)
Other comprehensive income	(227)				(227)			(227)				(227)
Total Equity, Ending at Jun. 30, 2022	19,507	8	8,343	22,827	(9,204)	0		19,754	0	8,375	20,049	(9,204)	0	534
Total Equity, Beginning at Mar. 31, 2022		8	8,217	21,672	(8,796)	0			0	8,229	19,721	(8,796)	0
Stock Issued										62
Stock-based compensation and allocation of ESOP shares			84			0				84			0
Net income available for The Dow Chemical Company common stockholder	1,652			1,661							1,667
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (1,333)
Other				1							(6)
Other comprehensive income	(408)				(408)			(408)				(408)
Total Equity, Ending at Jun. 30, 2022	19,507	$ 8	$ 8,343	$ 22,827	$ (9,204)	$ 0		19,754	$ 0	$ 8,375	$ 20,049	$ (9,204)	$ 0	$ 534
The Dow Chemical Company’s stockholders’ equity	$ 18,973							$ 19,220