REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Revenues	$ 54,968	$ 38,542	$ 42,951
Contract with Customer, Liability, Revenue Recognized	295	145	145
Contract with Customer, Asset, Reclassified to Receivable	35	25
Trade (net of allowance for doubtful receivables - 2021: $54; 2020: $51)	6,841	5,090
Contract assets - current	34	58
Contract assets - noncurrent	26	11
Contract liabilities - current	209	349
Contract liabilities - noncurrent	1,925	1,915
The Dow Chemical Company
Revenue from External Customer [Line Items]
Trade (net of allowance for doubtful receivables - 2021: $54; 2020: $51)	6,841	5,090
U.S.& Canada [Member]
Revenue from External Customer [Line Items]
Revenues	19,613	13,582	15,549
Europe, Middle East, Africa and India
Revenue from External Customer [Line Items]
Revenues	19,746	12,969	14,612
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Revenues	10,043	8,165	8,676
Latin America [Member]
Revenue from External Customer [Line Items]
Revenues	5,566	3,826	4,114
Packaging & Specialty Plastics [Member] [Domain]
Revenue from External Customer [Line Items]
Revenues	28,128	18,301	20,245
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	16,851	12,021	13,440
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	9,672	7,951	8,923
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	317	269	343
Hydrocarbons & Energy [Member] | Packaging & Specialty Plastics [Member] [Domain]
Revenue from External Customer [Line Items]
Revenues	8,149	4,271	5,357
Packaging and Specialty Plastics [Member] | Packaging & Specialty Plastics [Member] [Domain]
Revenue from External Customer [Line Items]
Revenues	19,979	14,030	14,888
Industrial Solutions [Member] | Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	5,139	3,929	4,310
Polyurethanes & Construction Chemicals | Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	11,700	8,080	9,117
Other [Member] | Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	12	12	13
Coatings and Performance Monomers [Member] | Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	4,050	3,258	3,517
Consumer Solutions [Member] | Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	$ 5,622	$ 4,693	$ 5,406
Maximum
Revenue from External Customer [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	19 years
Product
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	99.00%	99.00%	98.00%
Licensing of Technology
Revenue from External Customer [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 829	$ 977