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, 2021		$ 8	$ 8,151	$ 20,623	$ (8,977)	$ (15)			$ 0	$ 8,159	$ 19,288	$ (8,977)	$ (15)
Stock Issued										99
Stock-based compensation and allocation of ESOP shares			198			15				198			15
Net income available for The Dow Chemical Company common stockholder	$ 3,948			3,969							3,975
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (3,755)
Other				13							(17)
Other comprehensive income	(605)				(605)			$ (605)				(605)
Total Equity, Ending at Sep. 30, 2022	18,629	8	8,396	23,068	(9,582)	0		18,877	0	8,456	19,491	(9,582)	0	$ 512
Total Equity, Beginning at Jun. 30, 2022		8	8,343	22,827	(9,204)	0			0	8,375	20,049	(9,204)	0
Stock Issued										2
Stock-based compensation and allocation of ESOP shares			79			0				79			0
Net income available for The Dow Chemical Company common stockholder	735			739							747
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							(1,301)
Other				5							(4)
Other comprehensive income	(378)				(378)			(378)				(378)
Total Equity, Ending at Sep. 30, 2022	18,629	8	8,396	23,068	(9,582)	0		18,877	0	8,456	19,491	(9,582)	0	512
The Dow Chemical Company’s stockholders’ equity	18,117							18,365
The Dow Chemical Company’s stockholders’ equity	20,718							20,960
Total Equity, Beginning at Dec. 31, 2022	21,247	8	8,540	23,180	(7,139)	0		21,489	0	8,627	19,472	(7,139)	0
Stock Issued										63
Stock-based compensation and allocation of ESOP shares			217			0				217			0
Net income available for The Dow Chemical Company common stockholder	686			694							672
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							(2,008)
Other				17							(17)
Other comprehensive income	(122)				(122)			(122)				(122)
Total Equity, Ending at Sep. 30, 2023	20,080	8	8,722	22,376	(7,261)	0		20,278	0	8,907	18,119	(7,261)	0	513
Total Equity, Beginning at Jun. 30, 2023		8	8,661	22,570	(7,067)	0			0	8,822	18,469	(7,067)	0
Stock Issued										8
Stock-based compensation and allocation of ESOP shares			77			0				77			0
Net income available for The Dow Chemical Company common stockholder	300			302							285
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (630)
Other				4							(5)
Other comprehensive income	(194)				(194)			(194)				(194)
Total Equity, Ending at Sep. 30, 2023	20,080	$ 8	$ 8,722	$ 22,376	$ (7,261)	$ 0		20,278	$ 0	$ 8,907	$ 18,119	$ (7,261)	$ 0	$ 513
The Dow Chemical Company’s stockholders’ equity	$ 19,567							$ 19,765