SEPARATION FROM DOWDUPONT Separation and Distribution, Tax Matters and Other Agreements (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 01, 2019
Charges related to separation, distribution and tax matters agreements		$ (30)	$ 21	$ 144
Deferred cash contribution					$ 400
Settlements and transfers related to separation from DowDuPont Inc.		0	0	1,935
Cash payment related to divestiture	$ 215	60	18
Cash receipt related to divestiture	98	144
Business Combination, Integration And Separation Related Costs		0	239	1,063
Integration and separation costs [Member]
Charges related to separation, distribution and tax matters agreements	24
Sundry Income (Expense), Net
Charges related to separation, distribution and tax matters agreements	$ 69
Other Current Assets [Member]
Indemnification asset		0	77
Other Noncurrent Assets [Member]
Indemnification asset		20	33
Accrued and Other Current Liabilities [Member]
Indemnification liability		148	412
Deferred cash contribution		15	103
Other Noncurrent Obligations
Indemnification liability		39	46
Deferred cash contribution		96	96
Dow Inc. [Member]
Business Combination, Integration And Separation Related Costs			239	1,063
The Dow Chemical Company
Settlements and transfers related to separation from DowDuPont Inc.		0	0	61
Business Combination, Integration And Separation Related Costs		$ 0	$ 239	$ 1,039