REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	99.00%	99.00%
Revenue, Remaining Performance Obligation, Amount	$ 963		$ 840
Revenues	11,851	$ 15,264
Contract with Customer, Liability, Revenue Recognized	40	65
Accounts and notes receivable - Trade	5,740		5,611
Contract assets - current	21		48
Contract assets - noncurrent	16		16
Contract liabilities - current	293		275
Contract liabilities - noncurrent	1,740		1,725
Contract with Customer, Asset, Reclassified to Receivable	30
The Dow Chemical Company
Revenue from External Customer [Line Items]
Accounts and notes receivable - Trade	5,740		$ 5,611
U.S. & Canada
Revenue from External Customer [Line Items]
Revenues	4,450	5,537
EMEAI 1
Revenue from External Customer [Line Items]
Revenues	4,053	5,512
Asia Pacific
Revenue from External Customer [Line Items]
Revenues	2,047	2,753
Latin America
Revenue from External Customer [Line Items]
Revenues	$ 1,301	1,462
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	17 years
Packaging & Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	$ 6,114	7,627
Packaging & Specialty Plastics [Member] | Hydrocarbons & Energy [Member]
Revenue from External Customer [Line Items]
Revenues	1,874	2,416
Packaging & Specialty Plastics [Member] | Packaging and Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	4,240	5,211
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	3,378	4,524
Industrial Intermediates & Infrastructure [Member] | Industrial Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,139	1,515
Industrial Intermediates & Infrastructure [Member] | Polyurethanes & CAV [Member]
Revenue from External Customer [Line Items]
Revenues	2,234	3,005
Industrial Intermediates & Infrastructure [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues	5	4
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	2,276	3,049
Performance Materials & Coatings [Member] | Coatings and Performance Monomers [Member]
Revenue from External Customer [Line Items]
Revenues	858	1,075
Performance Materials & Coatings [Member] | Consumer Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,418	1,974
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	$ 83	$ 64