Common Control Transfer DAS Common Control Income Statement (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Business Acquisition [Line Items]
Net Sales		$ 1,911	$ 3,396	$ 1,947		$ 10,863		$ 11,472
Income (loss) from continuing operations before income taxes		(631)	(251)	(5,650)	[1]	(129)	[1]	(5,892)	[1]
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ (527)	(184)	(5,642)	[1]	$ (228)	[1]	(5,705)	[1]
Historical EID [Member]
Business Acquisition [Line Items]
Net Sales			6,288	5,294				20,538
Income (loss) from continuing operations before income taxes			49	(4,948)				(4,482)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest			89	(4,960)				(4,662)
Discontinued Operations and Other Adjustments [Member]
Business Acquisition [Line Items]
Net Sales	[2]		(4,341)	(4,378)				(13,288)
Income (loss) from continuing operations before income taxes	[2]		(476)	(535)				(1,668)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	[2]		(369)	(515)				(1,180)
DAS [Member]
Business Acquisition [Line Items]
Net Sales			1,449	1,031				4,222
Income (loss) from continuing operations before income taxes			176	(167)				258
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest			$ 96	$ (167)				$ 137

[1] Periods prior to March 31, 2019 are on a pro forma basis, prepared in accordance with Article 11 of Regulation S-X.

[2] Reflects discontinued operations of EID's ECP and Specialty Products businesses and adjustments primarily related to the elimination of intercompany transactions between Historical EID and Dow AgroSciences for periods subsequent to the Merger, as if they were combined affiliates.