Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Add'l Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Unearned ESOP	Treasury Stock, Common
Beginning balance at Dec. 31, 2019		$ 8	$ 7,325	$ 17,045	$ (10,246)	$ (91)	$ (500)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued/sold			108
Stock-based compensation and allocation of ESOP shares			162			42
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			0
Other			0	(15)
Net income available for The Dow Chemical Company common stockholder	$ 1,225			1,225
Dividends to stockholders				(2,071)
Settlements and transfers related to separation from DowDuPont Inc.				177
Other comprehensive income (loss)	(609)				(609)
Treasury stock purchases							(125)
Stock Issued During Period, Value, Treasury Stock Reissued - compensation and benefit plans							0
Ending balance at Dec. 31, 2020	$ 13,005	8	7,595	16,361	(10,855)	(49)	(625)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share of common stock	$ 2.80
Dow Inc.’s stockholders’ equity	$ 12,435
Noncontrolling interests	570
Common stock issued/sold			320
Stock-based compensation and allocation of ESOP shares			236			34
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			0
Other			0	(22)
Net income available for The Dow Chemical Company common stockholder	6,311			6,311
Dividends to stockholders				(2,073)
Settlements and transfers related to separation from DowDuPont Inc.				46
Other comprehensive income (loss)	1,878				1,878
Treasury stock purchases							(1,000)
Stock Issued During Period, Value, Treasury Stock Reissued - compensation and benefit plans							0
Ending balance at Dec. 31, 2021	$ 18,739	8	8,151	20,623	(8,977)	(15)	(1,625)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share of common stock	$ 2.80
Dow Inc.’s stockholders’ equity	$ 18,165
Noncontrolling interests	574
Common stock issued/sold			212
Stock-based compensation and allocation of ESOP shares			258			15
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			(79)
Other			(2)	(19)
Net income available for The Dow Chemical Company common stockholder	4,582			4,582
Dividends to stockholders				(2,006)
Settlements and transfers related to separation from DowDuPont Inc.				0
Other comprehensive income (loss)	1,838				1,838
Treasury stock purchases							(2,325)
Stock Issued During Period, Value, Treasury Stock Reissued - compensation and benefit plans							79
Ending balance at Dec. 31, 2022	$ 21,247	$ 8	$ 8,540	$ 23,180	$ (7,139)	$ 0	$ (3,871)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share of common stock	$ 2.80
Dow Inc.’s stockholders’ equity	$ 20,718
Noncontrolling interests	$ 529