EARNINGS PER SHARE CALCULATIONS - Summary of Net Income for EPS Calculations, Basic (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Loss from continuing operations, net of tax		$ (2,471)	$ (1,103)	$ (3,081)	$ (1,177)
Net income from continuing operations attributable to noncontrolling interests		7	9	13	13
Net income from continuing operations attributable to participating securities	[1]	0	0	0	(1)
Loss from continuing operations attributable to common stockholders		(2,478)	(1,112)	(3,094)	(1,191)
Income from discontinued operations, net of tax		0	566	0	1,212
Net income from discontinued operations attributable to noncontrolling interests		0	25	0	(72)
Income from discontinued operations attributable to common stockholders		0	541	0	1,140
Net loss attributable to common stockholders		$ (2,478)	$ (571)	$ (3,094)	$ (51)

[1] Historical Dow restricted stock units are considered participating securities due to Historical Dow's practice of paying dividend equivalents on unvested shares.