REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	98.00%	97.00%	97.00%	98.00%
Revenue, Remaining Performance Obligation, Amount	$ 762		$ 762		$ 759
Revenues	10,104	$ 10,915	20,535	$ 21,680
Contract with Customer, Liability, Revenue Recognized			130	90
Accounts and notes receivable - Trade	5,426		5,426		4,756
Contract assets - noncurrent	0		0		2
Contract liabilities - current	196		196		244
Contract liabilities - noncurrent	1,431		1,431		1,480
The Dow Chemical Company
Revenue from External Customer [Line Items]
Accounts and notes receivable - Trade	5,426		5,426		$ 4,756
U.S. & Canada
Revenue from External Customer [Line Items]
Revenues	3,988	4,191	8,215	8,321
EMEAI 1
Revenue from External Customer [Line Items]
Revenues	3,272	3,572	6,546	7,056
Asia Pacific
Revenue from External Customer [Line Items]
Revenues	1,737	1,901	3,595	3,822
Latin America
Revenue from External Customer [Line Items]
Revenues	$ 1,107	1,251	$ 2,179	2,481
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	18 years		18 years
Packaging & Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	$ 5,025	5,515	$ 10,335	10,945
Packaging & Specialty Plastics [Member] | Hydrocarbons & Energy [Member]
Revenue from External Customer [Line Items]
Revenues	1,350	1,447	2,928	2,914
Packaging & Specialty Plastics [Member] | Packaging and Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	3,675	4,068	7,407	8,031
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	2,786	2,951	5,641	5,959
Industrial Intermediates & Infrastructure [Member] | Industrial Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	985	1,040	2,039	2,068
Industrial Intermediates & Infrastructure [Member] | Polyurethanes & CAV [Member]
Revenue from External Customer [Line Items]
Revenues	1,797	1,909	3,594	3,886
Industrial Intermediates & Infrastructure [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues	4	2	8	5
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	2,129	2,243	4,200	4,395
Performance Materials & Coatings [Member] | Coatings and Performance Monomers [Member]
Revenue from External Customer [Line Items]
Revenues	864	928	1,709	1,813
Performance Materials & Coatings [Member] | Consumer Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,265	1,315	2,491	2,582
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	$ 164	$ 206	$ 359	$ 381