REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	98.00%	99.00%	99.00%	99.00%
Revenue, Remaining Performance Obligation, Amount	$ 867		$ 867		$ 840
Revenues	11,420	$ 15,664	23,271	$ 30,928
Contract with Customer, Liability, Revenue Recognized			175	105
Accounts and notes receivable - Trade	5,539		5,539		5,611
Contract assets - current	15		15		48
Contract assets - noncurrent	3		3		16
Contract liabilities - current	207		207		275
Contract liabilities - noncurrent	1,725		1,725		1,725
Contract with Customer, Asset, Reclassified to Receivable	45
The Dow Chemical Company
Revenue from External Customer [Line Items]
Accounts and notes receivable - Trade	5,539		5,539		$ 5,611
U.S. & Canada
Revenue from External Customer [Line Items]
Revenues	4,249	5,707	8,699	11,244
EMEAI 1
Revenue from External Customer [Line Items]
Revenues	3,774	5,677	7,827	11,189
Asia Pacific
Revenue from External Customer [Line Items]
Revenues	2,058	2,673	4,105	5,426
Latin America
Revenue from External Customer [Line Items]
Revenues	$ 1,339	1,607	$ 2,640	3,069
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	17 years		17 years
Packaging & Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	$ 5,940	8,233	$ 12,054	15,860
Packaging & Specialty Plastics [Member] | Hydrocarbons & Energy [Member]
Revenue from External Customer [Line Items]
Revenues	1,672	2,779	3,546	5,195
Packaging & Specialty Plastics [Member] | Packaging and Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	4,268	5,454	8,508	10,665
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	3,177	4,370	6,555	8,894
Industrial Intermediates & Infrastructure [Member] | Industrial Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,084	1,446	2,223	2,961
Industrial Intermediates & Infrastructure [Member] | Polyurethanes & CAV [Member]
Revenue from External Customer [Line Items]
Revenues	2,090	2,919	4,324	5,924
Industrial Intermediates & Infrastructure [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues	3	5	8	9
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	2,197	3,003	4,473	6,052
Performance Materials & Coatings [Member] | Coatings and Performance Monomers [Member]
Revenue from External Customer [Line Items]
Revenues	875	1,129	1,733	2,204
Performance Materials & Coatings [Member] | Consumer Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,322	1,874	2,740	3,848
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	$ 106	$ 58	$ 189	$ 122