REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenue from External Customer [Line Items]
Revenue, Percentage from Products and Service Transferred to Customers	99.00%	99.00%	99.00%	98.00%
Revenue, Remaining Performance Obligation, Amount	$ 919		$ 919		$ 829
Revenues	14,115	$ 14,837	45,043	$ 40,604
Contract with Customer, Liability, Revenue Recognized			165	250
Accounts and notes receivable - Trade	6,407		6,407		6,841
Contract assets - current	40		40		34
Contract assets - noncurrent	19		19		26
Contract liabilities - current 1	315		315		209
Contract liabilities - noncurrent 2	1,727		1,727		1,925
Contract with Customer, Asset, Reclassified to Receivable				5
The Dow Chemical Company
Revenue from External Customer [Line Items]
Accounts and notes receivable - Trade	6,407		6,407		$ 6,841
U.S. & Canada
Revenue from External Customer [Line Items]
Revenues	5,334	5,476	16,578	14,431
EMEAI 1
Revenue from External Customer [Line Items]
Revenues	4,634	5,229	15,823	14,660
Asia Pacific
Revenue from External Customer [Line Items]
Revenues	2,571	2,579	7,997	7,423
Latin America
Revenue from External Customer [Line Items]
Revenues	$ 1,576	1,553	$ 4,645	4,090
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	$ 7,327	7,736	$ 23,187	20,939
Packaging & Specialty Plastics [Member] | Hydrocarbons & Energy [Member]
Revenue from External Customer [Line Items]
Revenues	2,509	2,251	7,704	6,010
Packaging & Specialty Plastics [Member] | Packaging and Specialty Plastics [Member]
Revenue from External Customer [Line Items]
Revenues	4,818	5,485	15,483	14,929
Industrial Intermediates & Infrastructure [Member]
Revenue from External Customer [Line Items]
Revenues	4,059	4,481	12,953	12,303
Industrial Intermediates & Infrastructure [Member] | Industrial Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,420	1,377	4,381	3,627
Industrial Intermediates & Infrastructure [Member] | Polyurethanes & CAV [Member]
Revenue from External Customer [Line Items]
Revenues	2,636	3,102	8,560	8,670
Industrial Intermediates & Infrastructure [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues	3	2	12	6
Performance Materials & Coatings [Member]
Revenue from External Customer [Line Items]
Revenues	2,654	2,526	8,706	7,114
Performance Materials & Coatings [Member] | Coatings and Performance Monomers [Member]
Revenue from External Customer [Line Items]
Revenues	1,052	1,110	3,256	2,975
Performance Materials & Coatings [Member] | Consumer Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	1,602	1,416	5,450	4,139
Corporate Segment [Member]
Revenue from External Customer [Line Items]
Revenues	$ 75	$ 94	$ 197	$ 248