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Statement of Stockholders Equity Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Divisional Equity [Member]	Retained Earnings [Member]	Accumulated Other Comp (Loss) Income	Treasury Stock [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] Accumulated Other Comp (Loss) Income	EID [Member] Treasury Stock [Member]	EID [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, 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 income	176			164				12	176				166				10
Other comprehensive (loss) income	(74)					(74)			(74)						(74)
Dividends, Preferred Stock									(2)				(2)
Distributions	(317)			(317)					(317)											$ (317)	$ (317)
Issuance of Stock									35				35					$ 35	$ 35
Share-based compensation	18			18					18				18
Contributions	88			88					88				88
Other	(5)			(3)				(2)	(3)				(3)
Ending Balance at Mar. 31, 2019	75,074	0	0	78,005	0	(3,434)	0	503	75,074	0	0	0	78,244	0	(3,434)	0	264
Beginning Balance at Dec. 31, 2019	24,555	7	27,997		(425)	(3,270)	0	246	20,528	239	0	23,958		(406)	(3,270)	0	7
Net income	282				272			10	258					250			8
Other comprehensive (loss) income	(663)					(663)			(663)						(663)
Dividends, Common Stock	(97)		(97)
Dividends, Preferred Stock									(2)			(2)
Distributions	0								0
Issuance of Stock																						$ 14	$ 14	$ 14	$ 14
Share-based compensation	2		2						2			2
Contributions	0								0
Common stock repurchase	(50)		(50)
Other	36			40	(2)			(2)	30			32		(2)
Ending Balance at Mar. 31, 2020	$ 24,079	$ 7	$ 27,906		$ (155)	$ (3,933)	$ 0	$ 254	$ 20,167	$ 239	$ 0	$ 24,004		$ (158)	$ (3,933)	$ 0	$ 15