REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	98.00%	99.00%	98.00%	99.00%
Revenue, Remaining Performance Obligation, Amount	$ 890		$ 890		$ 840
Revenues	10,730	$ 14,115	34,001	$ 45,043
Contract with Customer, Liability, Revenue Recognized			205	165
Accounts and notes receivable - Trade	5,343		5,343		5,611
Contract assets - current	29		29		48
Contract assets - noncurrent	4		4		16
Contract liabilities - current	220		220		275
Contract liabilities - noncurrent	1,703		1,703		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	5,343		5,343		$ 5,611
U.S. & Canada
Revenue from External Customer [Line Items]
Revenues	3,968	5,334	12,667	16,578
EMEAI 1
Revenue from External Customer [Line Items]
Revenues	3,398	4,634	11,225	15,823
Asia Pacific
Revenue from External Customer [Line Items]
Revenues	2,067	2,571	6,172	7,997
Latin America
Revenue from External Customer [Line Items]
Revenues	$ 1,297	1,576	$ 3,937	4,645
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	$ 5,454	7,327	$ 17,508	23,187
Packaging & Specialty Plastics [Member] | Hydrocarbons & Energy [Member]
Revenue from External Customer [Line Items]
Revenues	1,441	2,509	4,987	7,704
Packaging & Specialty Plastics [Member] | Packaging and Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	4,013	4,818	12,521	15,483
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	3,035	4,059	9,590	12,953
Industrial Intermediates & Infrastructure [Member] | Industrial Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,012	1,420	3,235	4,381
Industrial Intermediates & Infrastructure [Member] | Polyurethanes & CAV [Member]
Revenue from External Customer [Line Items]
Revenues	2,019	2,636	6,343	8,560
Industrial Intermediates & Infrastructure [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues	4	3	12	12
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	2,130	2,654	6,603	8,706
Performance Materials & Coatings [Member] | Coatings and Performance Monomers [Member]
Revenue from External Customer [Line Items]
Revenues	839	1,052	2,572	3,256
Performance Materials & Coatings [Member] | Consumer Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,291	1,602	4,031	5,450
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	$ 111	$ 75	$ 300	$ 197