EARNINGS PER SHARE Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2019
Income (loss) from continuing operations, net of tax	$ (2,310)	$ 347	$ 90	$ 156	$ 491	$ 714	$ 810	$ 925	$ (1,717)	$ 2,940	$ (1,287)
Net income attributable to participating securities - continuing operations 1									(6)	0	(8)
Income (loss) from continuing operations attributable to common stockholders									(1,797)	2,838	(1,397)
Income from discontinued operations, net of tax	$ 0	$ 0	$ 0	$ 445	$ 432	$ 335	$ 554	$ 514	445	1,835	1,882
Net income attributable to participating securities - discontinued operations 1									0	0	(6)
Income from discontinued operations attributable to common stockholders									432	1,803	1,848
Net income (loss) attributable to common stockholders									$ (1,365)	$ 4,641	$ 451
Earnings (loss) per common share from continuing operations - basic	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	$ 0.63	$ 0.91	$ 1.05	$ 1.21	$ (2.42)	$ 3.80	$ (1.88)
Earnings per common share from discontinued operations - basic									0.58	2.41	2.48
Earnings (loss) per common share - basic									(1.84)	6.21	0.60
Earnings (loss) per common share from continuing operations - diluted	$ (3.14)	$ 0.45	$ 0.10	$ 0.16	$ 0.63	$ 0.91	$ 1.05	$ 1.21	(2.42)	3.80	(1.88)
Earnings per common share from discontinued operations - diluted									0.58	2.41	2.48
Earnings (loss) per common share - diluted									$ (1.84)	$ 6.21	$ 0.60
Weighted-average common shares outstanding - basic									742.5	747.2	744.8
Weighted-average common shares - basic 2, 3									0.0	0.0	0.0
Weighted-average common shares outstanding - diluted									742.5	747.2	744.8
Stock options and restricted stock units excluded from EPS calculations 5									20.8	0.0	1.1
Employee Stock Ownership Plan (ESOP), Shares in ESOP												4.6
Adjustment for TDCC Basic Common Shares Outstanding in Pre-Merger Period												2.4
Noncontrolling Interests
Net income attributable to noncontrolling interests - continuing operations									$ (74)	$ (102)	$ (102)
Net income attributable to noncontrolling interests - discontinued operations									$ (13)	$ (32)	$ (28)
DowDuPont
Common Stock, Shares, Outstanding												2,246.3