Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss	Noncontrolling Interests	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 Noncontrolling Interests
Total Equity, Beginning at Dec. 31, 2023		$ 8	$ 8,880	$ 21,774	$ (7,681)	$ 501			$ 0	$ 9,091	$ 17,495	$ (7,681)
Stock Issued										51
Stock-based compensation and allocation of ESOP shares			199							199
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			0							0
Net income available for The Dow Chemical Company common stockholder	$ 955			955				$ 962			962
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (1,477)
Other			0	16							(16)
Other comprehensive income	(104)				(104)			(104)				(104)
Total Equity, Ending at Jun. 30, 2024	18,800	8	9,012	21,739	(7,785)	482		19,002	0	9,341	16,964	(7,785)	$ 482
Total Equity, Beginning at Mar. 31, 2024		8	8,942	21,796	(7,814)	492			0	9,220	17,214	(7,814)
Stock Issued										9
Stock-based compensation and allocation of ESOP shares			112							112
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			0							0
Net income available for The Dow Chemical Company common stockholder	439			439				441			441
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							(686)
Other			0	5							(5)
Other comprehensive income	29				29			29				29
Total Equity, Ending at Jun. 30, 2024	18,800	8	9,012	21,739	(7,785)	482		19,002	0	9,341	16,964	(7,785)	482
The Dow Chemical Company’s stockholders’ equity	18,318							18,520
The Dow Chemical Company’s stockholders’ equity	17,355							17,536
Total Equity, Beginning at Dec. 31, 2024	17,851	8	9,203	20,909	(8,110)	496		18,032	0	9,626	16,020	(8,110)
Stock Issued										0
Stock-based compensation and allocation of ESOP shares			196							196
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			1,540							1,540
Net income available for The Dow Chemical Company common stockholder	(1,142)			(1,142)				(1,121)			(1,121)
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							(985)
Other			1	11							(12)
Other comprehensive income	284				284			284				284
Total Equity, Ending at Jun. 30, 2025	18,592	8	10,758	18,766	(7,826)	1,361		18,799	0	11,362	13,902	(7,826)	1,361
Total Equity, Beginning at Mar. 31, 2025		8	9,195	20,101	(7,956)	507			0	9,713	15,193	(7,956)
Stock Issued										0
Stock-based compensation and allocation of ESOP shares			109							109
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			1,540							1,540
Net income available for The Dow Chemical Company common stockholder	(835)			(835)				(816)			(816)
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (470)
Other			1	4							(5)
Other comprehensive income	130				130			130				130
Total Equity, Ending at Jun. 30, 2025	18,592	$ 8	$ 10,758	$ 18,766	$ (7,826)	$ 1,361		18,799	$ 0	$ 11,362	$ 13,902	$ (7,826)	$ 1,361
The Dow Chemical Company’s stockholders’ equity	$ 17,231							$ 17,438