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]	Unearned ESOP Shares [Member]	Treasury Stock [Member]
Total equity		$ 0	$ 7,042	$ 35,460	$ (9,885)	$ (134)	$ 0
Stock Issued During Period, Value, New Issues and Treasury Stock Reissued			0
Stock Issued During Period, Value, Parent Company Stock			28
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			83			29
Stockholders' Equity, Other				(2)
Net Income (Loss) Available to Common Stockholders, Basic				556
Dividends, Common Stock				0
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees				(535)
Settlements and transfers related to separation from DowDuPont Inc.	$ 36			35
Other Comprehensive Income (Loss), Net of Tax	$ 102				102
Treasury Stock, Value, Acquired, Cost Method							0
Common Stock, Dividends, Per Share, Declared	$ 0
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement				(111)
Settlements and transfers related to separation from DowDuPont Inc.				14,806
Dow Inc.’s stockholders’ equity	$ 32,668
Noncontrolling interests	1,180
Total equity	33,848	0	7,153	35,403	(9,783)	(105)	0
Dow Inc.’s stockholders’ equity	13,541
Noncontrolling interests	553
Total equity	14,094	8	7,325	17,045	(10,246)	(91)	(500)
Stock Issued During Period, Value, New Issues and Treasury Stock Reissued			16
Stock Issued During Period, Value, Parent Company Stock			0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			29			10
Stockholders' Equity, Other				(3)
Net Income (Loss) Available to Common Stockholders, Basic				239
Dividends, Common Stock				(518)
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees				0
Settlements and transfers related to separation from DowDuPont Inc.	0			0
Other Comprehensive Income (Loss), Net of Tax	$ (283)				(283)
Treasury Stock, Value, Acquired, Cost Method							(125)
Common Stock, Dividends, Per Share, Declared	$ 0.70
Stockholders' Equity, Period Increase (Decrease) | Adjustments for New Accounting Pronouncement				0
Dow Inc.’s stockholders’ equity	$ 12,906
Noncontrolling interests	555
Total equity	$ 13,461	$ 8	$ 7,370	$ 16,763	$ (10,529)	$ (81)	$ (625)