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										35
Stock-based compensation and allocation of ESOP shares			35			15				35			15
Net income available for The Dow Chemical Company common stockholder	$ 1,561			1,569							1,561
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (1,121)
Other				7							(7)
Other comprehensive income	181				181			$ 181				181
Total Equity, Ending at Mar. 31, 2022	19,425	8	8,217	21,672	(8,796)	0		19,699	0	8,229	19,721	(8,796)	0	$ 545
The Dow Chemical Company’s stockholders’ equity	18,880							19,154
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										55
Stock-based compensation and allocation of ESOP shares			56			0				56			0
Net income available for The Dow Chemical Company common stockholder	(96)			(93)							(100)
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees							$ (620)
Other				7							(6)
Other comprehensive income	74				74			74				74
Total Equity, Ending at Mar. 31, 2023	20,715	$ 8	$ 8,607	$ 22,584	$ (7,065)	$ 0		20,953	$ 0	$ 8,738	$ 18,746	$ (7,065)	$ 0	$ 534
The Dow Chemical Company’s stockholders’ equity	$ 20,181							$ 20,419