RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (DowDuPont Agricultural Division Restructuring Program) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net	$ 249	$ 108	$ 98	$ 165	$ 2,974	$ 139	$ (12)	$ (1)	$ 620	$ 3,100	$ 595
DowDuPont Agriculture Division Restructuring Program
Restructuring Cost and Reserve [Line Items]
Expected cost	31								31
Restructuring, goodwill impairment and asset related charges - net	25								25
Charges against the reserve									(1)
Cash payments									(1)
Restructuring Reserve	23								23
DowDuPont Agriculture Division Restructuring Program | Severance and Related Benefit Costs
Restructuring Cost and Reserve [Line Items]
Expected cost	28								28
Restructuring, goodwill impairment and asset related charges - net	24								24
Charges against the reserve									0
Cash payments									(1)
Restructuring Reserve	23								23
DowDuPont Agriculture Division Restructuring Program | Asset Write-downs and Write-offs
Restructuring Cost and Reserve [Line Items]
Asset related expected costs	3								3
Restructuring, goodwill impairment and asset related charges - net	1								1
Charges against the reserve									(1)
Cash payments									0
Restructuring Reserve	0								0
Accrued and Other Current Liabilities [Member] | DowDuPont Agriculture Division Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 23								$ 23