Consolidated Statements of Equity - USD ($) $ in Millions	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Divisional Equity [Member]	Retained Earnings [Member]	AOCI Attributable to Parent	Treasury Stock [Member]	Noncontrolling Interest [Member]	Successor Period [Member]	Successor Period [Member] Common Stock [Member]	Successor Period [Member] Additional Paid-in Capital [Member]	Successor Period [Member] Divisional Equity [Member]	Successor Period [Member] Retained Earnings [Member]	Successor Period [Member] AOCI Attributable to Parent	Successor Period [Member] Treasury Stock [Member]	Successor Period [Member] Noncontrolling Interest [Member]	EID [Member]	EID [Member] Preferred Stock [Member]	EID [Member] Common Stock [Member]	EID [Member] Additional Paid-in Capital [Member]	EID [Member] Divisional Equity [Member]	EID [Member] Retained Earnings [Member]	EID [Member] AOCI Attributable to Parent	EID [Member] Treasury Stock [Member]	EID [Member] Noncontrolling Interest [Member]	EID [Member] Successor Period [Member]	EID [Member] Successor Period [Member] Preferred Stock [Member]	EID [Member] Successor Period [Member] Common Stock [Member]	EID [Member] Successor Period [Member] Additional Paid-in Capital [Member]	EID [Member] Successor Period [Member] Divisional Equity [Member]	EID [Member] Successor Period [Member] Retained Earnings [Member]	EID [Member] Successor Period [Member] AOCI Attributable to Parent	EID [Member] Successor Period [Member] Treasury Stock [Member]	EID [Member] Successor Period [Member] Noncontrolling Interest [Member]	DowDuPont [Member]	DowDuPont [Member] Divisional Equity [Member]	DowDuPont [Member] EID [Member]	DowDuPont [Member] EID [Member] Divisional Equity [Member]	Corteva [Member]	Corteva [Member] Additional Paid-in Capital [Member]	Corteva [Member] EID [Member]	Corteva [Member] EID [Member] Additional Paid-in Capital [Member]
Beginning Balance at Dec. 31, 2016	$ 10,196	$ 237	$ 285	$ 11,190		$ 14,924	$ (9,911)	$ (6,727)	$ 198									$ 10,196	$ 237	$ 285	$ 11,190		$ 14,924	$ (9,911)	$ (6,727)	$ 198
Net (loss) income	1,761					1,734			27									1,761					1,741			20
Net other comprehensive income (loss)	1,289						1,289											1,289						1,289
Dividends, Common Stock	(995)					(991)			(4)									(995)					(991)			(4)
Dividends, Preferred Stock																		(7)					(7)
Distributions to Dow and DowDuPont
Stock-based compensation	275		2	273														275		2	273
Common stock retired	0		(26)	(1,044)		(5,657)		6,727										0		(26)	(1,044)		(5,657)		6,727
Stockholders' Equity, Other	(9)								(9)									(2)								(2)
Ending Balance at Aug. 31, 2017	12,517	$ 237	261	10,419		10,010	(8,622)	0	212	$ 79,973	$ 0	$ 0	$ 80,287	$ 0	$ (757)	$ 0	$ 443	12,517	237	261	10,419		10,010	(8,622)	0	212	$ 79,973	$ 0	$ 0	$ 0	$ 80,526	$ 0	$ (757)	$ 0	$ 204
Net (loss) income	1,192				$ 1,182				10									1,192				1,185				7
Net other comprehensive income (loss)	(420)						(420)											(420)						(420)
Dividends, Preferred Stock																		(3)				(3)
Distributions to Dow and DowDuPont	(1,200)				(1,200)													(1,200)				(1,200)														$ 829
Contributions from Dow and DowDuPont	0																	0
Issuance of stock	30				30													30				30
Stock-based compensation	36				36													36				36
Stockholders' Equity, Other	(18)				(17)				(1)									(15)				(17)				2
Ending Balance at Dec. 31, 2017	79,593		0	0	80,318	0	(1,177)	0	452									79,593	0	0	0	80,557	0	(1,177)	0	213
Net (loss) income	(5,027)				(5,065)				38									(5,027)				(5,055)				28
Net other comprehensive income (loss)	(2,183)						(2,183)											(2,183)						(2,183)
Dividends, Preferred Stock																		(10)				(10)
Distributions to Dow and DowDuPont	(2,806)				(2,806)													(2,806)				(2,806)														2,806
Contributions from Dow and DowDuPont	5,363				5,363													5,363				5,363
Issuance of stock	85				85													85				85
Stock-based compensation	129				129													129				129
Stockholders' Equity, Other	(1)				(4)				3									9				(4)				13
Ending Balance at Dec. 31, 2018	75,153		0	0	78,020	0	(3,360)	0	493									75,153	0	0	0	78,259	0	(3,360)	0	254
Net (loss) income	(941)				(641)	(318)			18									(1,022)				(640)	(390)			8
Net other comprehensive income (loss)	(1,124)						(1,124)											(1,124)						(1,124)
Dividends, Common Stock	(194)			(97)		(97)
Dividends, Preferred Stock																		(10)			(2)	(2)	(6)
Distributions to Dow and DowDuPont	(317)				(317)													(317)				(317)														317
Contributions from Dow and DowDuPont	7,396				7,396													3,255				3,255
Issuance of stock																																				$ 39	$ 39	$ 39	$ 39	$ 8	$ 8	$ 8	$ 8
Stock-based compensation	103			41	62													103			41	62
Common Stock Repurchase	(25)			(25)
Impact of Internal Reorganizations	(55,496)				(56,479)		1,214		(231)									(55,496)				(56,479)		1,214		(231)
Reclassification of Divisional Equity to Additional Paid in Capital	0		7	28,070	(28,077)													0	239		23,936	(24,175)
Stockholders' Equity, Other	(47)				(3)	(10)			(34)									(61)			(25)	(2)	(10)			(24)
Ending Balance at Dec. 31, 2019	$ 24,555		$ 7	$ 27,997	$ 0	$ (425)	$ (3,270)	$ 0	$ 246									$ 20,528	$ 239	$ 0	$ 23,958	$ 0	$ (406)	$ (3,270)	$ 0	$ 7