RESTRUCTURING AND ASSET RELATED CHARGES - NET DowDuPont Cost Synergy Program (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended			37 Months Ended
	Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and asset related charges	$ 384	$ 82		$ 807	$ 290
Restructuring Reserve	127			127			$ 127	$ 162
Non-core | Income (Loss) From Equity Method Investments [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1			3
DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and asset related charges							489
Restructuring Reserve	30			30			30	76
Restructuring Charges	0	14	[1]	4	108	[1]
Charges against reserve				(1)
Cash Payments for Restructuring				(49)
DowDuPont Cost Synergy Program [Member] | Restructuring Settlement And Impairment Provisions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		13			105
DowDuPont Cost Synergy Program [Member] | Income (Loss) From Equity Method Investments [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1			3
DowDuPont Cost Synergy Program [Member] | Accrued and other current liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve								76
DowDuPont Cost Synergy Program [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and asset related charges							213
Restructuring Reserve	25			25			25	74
Restructuring Charges				(2)	49
Cash Payments for Restructuring				(47)
DowDuPont Cost Synergy Program [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and asset related charges							67
Restructuring Reserve	$ 5			5			5	$ 2
Restructuring Charges				6	16
Charges against reserve				(1)
Cash Payments for Restructuring				(2)
DowDuPont Cost Synergy Program [Member] | Asset Related Charges And Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and asset related charges							$ 209
Restructuring Charges		14			43
DowDuPont Cost Synergy Program [Member] | Nutrition & Biosciences
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3			38
DowDuPont Cost Synergy Program [Member] | Transportation & Industrial
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				1
DowDuPont Cost Synergy Program [Member] | Safety & Construction
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2		5	7
DowDuPont Cost Synergy Program [Member] | Non-core
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(1)			(1)
DowDuPont Cost Synergy Program [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 10		$ (2)	$ 64

[1] The charge for the three and nine months ended September 30, 2019 includes $13 million and $105 million which was recognized in "Restructuring and asset related charges - net" and $1 million and $3 million which was recognized in "Equity in earnings of nonconsolidated affiliates" in the interim Consolidated Statements of Operations.