Dow Consolidated Statements of Equity Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common
Total equity		$ 8	$ 8,880	$ 21,774	$ (7,681)	$ (4,374)
Stock Issued During Period, Value, Common Stock			51
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			199
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			(118)
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			0
Net income (loss) available for The Dow Chemical Company common stockholder	$ 955			955
Dividends, Common Stock				(984)
Transfer of Business Under Common Control				10
Stockholders' Equity, Other			0	(16)
Other Comprehensive Income (Loss), Net of Tax	$ (104)				(104)
Treasury Stock, Value, Acquired, Cost Method						(400)
Stock Issued During Period, Value Treasury Stock Reissued - compensation and benefit plans						118
Common Stock, Dividends, Per Share, Declared	$ 1.40
Total equity		8	8,942	21,796	(7,814)	(4,507)
Stock Issued During Period, Value, Common Stock			9
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			112
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			(51)
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			0
Net income (loss) available for The Dow Chemical Company common stockholder	$ 439			439
Dividends, Common Stock				(491)
Transfer of Business Under Common Control				0
Stockholders' Equity, Other			0	(5)
Other Comprehensive Income (Loss), Net of Tax	$ 29				29
Treasury Stock, Value, Acquired, Cost Method						(200)
Stock Issued During Period, Value Treasury Stock Reissued - compensation and benefit plans						51
Common Stock, Dividends, Per Share, Declared	$ 0.70
Dow Inc.’s stockholders’ equity	$ 18,318
Noncontrolling interests	482
Total equity	18,800	8	9,012	21,739	(7,785)	(4,656)
Dow Inc.’s stockholders’ equity	17,355
Noncontrolling interests	496
Total equity	17,851	8	9,203	20,909	(8,110)	(4,655)
Stock Issued During Period, Value, Common Stock			0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			196
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			(180)
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			1,540
Net income (loss) available for The Dow Chemical Company common stockholder	(1,142)			(1,142)
Dividends, Common Stock				(990)
Transfer of Business Under Common Control				0
Stockholders' Equity, Other			(1)	(11)
Other Comprehensive Income (Loss), Net of Tax	$ 284				284
Treasury Stock, Value, Acquired, Cost Method						0
Stock Issued During Period, Value Treasury Stock Reissued - compensation and benefit plans						180
Common Stock, Dividends, Per Share, Declared	$ 1.40
Total equity		8	9,195	20,101	(7,956)	(4,560)
Stock Issued During Period, Value, Common Stock			0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			109
APIC, Stock Issued During Period, Value, Treasury Reissued - compensation and benefit plans			(85)
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable			1,540
Net income (loss) available for The Dow Chemical Company common stockholder	$ (835)			(835)
Dividends, Common Stock				(496)
Transfer of Business Under Common Control				0
Stockholders' Equity, Other			(1)	(4)
Other Comprehensive Income (Loss), Net of Tax	$ 130				130
Treasury Stock, Value, Acquired, Cost Method						0
Stock Issued During Period, Value Treasury Stock Reissued - compensation and benefit plans						85
Common Stock, Dividends, Per Share, Declared	$ 0.70
Dow Inc.’s stockholders’ equity	$ 17,231
Noncontrolling interests	1,361
Total equity	$ 18,592	$ 8	$ 10,758	$ 18,766	$ (7,826)	$ (4,475)