REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	99.00%	98.00%	99.00%	98.00%
Revenue, Remaining Performance Obligation, Amount	$ 911		$ 911		$ 829
Revenues	15,664	$ 13,885	30,928	$ 25,767
Contract with Customer, Liability, Revenue Recognized			105	180
Accounts and notes receivable - Trade	7,474		7,474		6,841
Contract assets - current	36		36		34
Contract assets - noncurrent	25		25		26
Contract liabilities - current	259		259		209
Contract liabilities - noncurrent 1	1,818		1,818		1,925
The Dow Chemical Company
Revenue from External Customer [Line Items]
Accounts and notes receivable - Trade	7,474		7,474		$ 6,841
U.S. & Canada
Revenue from External Customer [Line Items]
Revenues	5,707	4,927	11,244	8,955
EMEAI 1
Revenue from External Customer [Line Items]
Revenues	5,677	5,102	11,189	9,431
Asia Pacific
Revenue from External Customer [Line Items]
Revenues	2,673	2,479	5,426	4,844
Latin America
Revenue from External Customer [Line Items]
Revenues	$ 1,607	1,377	$ 3,069	2,537
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	$ 8,233	7,121	$ 15,860	13,203
Packaging & Specialty Plastics [Member] | Hydrocarbons & Energy [Member]
Revenue from External Customer [Line Items]
Revenues	2,779	2,008	5,195	3,759
Packaging & Specialty Plastics [Member] | Packaging and Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	5,454	5,113	10,665	9,444
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	4,370	4,215	8,894	7,822
Industrial Intermediates & Infrastructure [Member] | Industrial Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,446	1,201	2,961	2,250
Industrial Intermediates & Infrastructure [Member] | Polyurethanes & CAV [Member]
Revenue from External Customer [Line Items]
Revenues	2,919	3,012	5,924	5,568
Industrial Intermediates & Infrastructure [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues	5	2	9	4
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	3,003	2,465	6,052	4,588
Performance Materials & Coatings [Member] | Coatings and Performance Monomers [Member]
Revenue from External Customer [Line Items]
Revenues	1,129	1,010	2,204	1,865
Performance Materials & Coatings [Member] | Consumer Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,874	1,455	3,848	2,723
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	$ 58	$ 84	$ 122	$ 154