Statement of Stockholders Equity Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comp (Loss) Income	Noncontrolling Interest [Member]	EID [Member]	EID [Member] Preferred Stock [Member]	EID [Member] Common Stock [Member]	EID [Member] Additional Paid-in Capital [Member]	EID [Member] Retained Earnings [Member]	EID [Member] Accumulated Other Comp (Loss) Income	EID [Member] Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2019	$ 24,555	$ 7	$ 27,997	$ (425)	$ (3,270)	$ 246	$ 20,528	$ 239	$ 0	$ 23,958	$ (406)	$ (3,270)	$ 7
Net income (loss)	282			272		10	258				250		8
Other comprehensive (loss) income	(663)				(663)		(663)					(663)
Common Dividends	(97)		(97)
Dividends, Preferred Stock							(2)			(2)
Issuance of Corteva Stock	14		14				14			14
Share-based compensation	2		2				2			2
Repurchase of common stock	(50)		(50)
Other-net	36		40	(2)		(2)	30			32	(2)
Ending Balance at Mar. 31, 2020	24,079	7	27,906	(155)	(3,933)	254	20,167	239	0	24,004	(158)	(3,933)	15
Beginning Balance at Dec. 31, 2019	24,555	7	27,997	(425)	(3,270)	246	20,528	239	0	23,958	(406)	(3,270)	7
Net income (loss)	658						596
Other comprehensive (loss) income	(526)				(526)		(526)
Ending Balance at Sep. 30, 2020	24,346	7	27,895	0	(3,796)	240	20,612	239	0	23,995	173	(3,796)	1
Beginning Balance at Mar. 31, 2020	24,079	7	27,906	(155)	(3,933)	254	20,167	239	0	24,004	(158)	(3,933)	15
Net income (loss)	766			760		6	742				739		3
Other comprehensive (loss) income	88				88		88					88
Common Dividends	(97)			(97)
Dividends, Preferred Stock							(3)				(3)
Issuance of Corteva Stock	3		3				3			3
Share-based compensation	19		19				19			19
Acquisition of a noncontrolling interest in consolidated subsidiaries	(52)		(37)			(15)	(52)			(37)			(15)
Other-net	(5)					(5)	(8)			(8)	2		(2)
Ending Balance at Jun. 30, 2020	24,801	7	27,891	508	(3,845)	240	20,956	239	0	23,981	580	(3,845)	1
Net income (loss)	(390)			(392)		2	(404)				(404)
Other comprehensive (loss) income	49				49		49					49
Common Dividends	(97)			(97)
Dividends, Preferred Stock							(2)				(2)
Issuance of Corteva Stock	2		2				2			2
Share-based compensation	15		16	(1)			15			16	(1)
Repurchase of common stock	(33)		(15)	(18)
Other-net	(1)		1			(2)	(4)			(4)
Ending Balance at Sep. 30, 2020	24,346	7	27,895	0	(3,796)	240	20,612	239	0	23,995	173	(3,796)	1
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	3,712						3,712
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	3,857						3,857
Beginning Balance at Dec. 31, 2020	25,063	7	27,707	0	(2,890)	239	21,601	239	0	24,049	203	(2,890)	0
Net income (loss)	603			600		3	592				591		1
Other comprehensive (loss) income	(477)				(477)		(477)					(477)
Common Dividends	(97)		(97)
Dividends, Preferred Stock							(2)				(2)
Issuance of Corteva Stock	38		38				38			38
Repurchase of common stock	(350)		(18)	(332)
Other-net	(2)					(2)	(4)			(4)
Ending Balance at Mar. 31, 2021	24,778	7	27,630	268	(3,367)	240	21,748	239	0	24,083	792	(3,367)	1
Beginning Balance at Dec. 31, 2020	25,063	7	27,707	0	(2,890)	239	21,601	239	0	24,049	203	(2,890)	0
Net income (loss)	1,608						1,578
Other comprehensive (loss) income	(755)				(755)		(755)
Ending Balance at Sep. 30, 2021	24,979	7	27,712	666	(3,645)	239	22,523	239	0	24,158	1,771	(3,645)	0
Beginning Balance at Mar. 31, 2021	24,778	7	27,630	268	(3,367)	240	21,748	239	0	24,083	792	(3,367)	1
Net income (loss)	973			970		3	963				963
Other comprehensive (loss) income	122				122		122					122
Common Dividends	(95)			(95)
Dividends, Preferred Stock							(3)				(3)
Issuance of Corteva Stock	28		28				28			28
Share-based compensation	22		23	(1)			22			23	(1)
Repurchase of common stock	(200)			(200)
Other-net	(3)		1	(1)		(3)	(2)			(3)	1
Ending Balance at Jun. 30, 2021	25,625	7	27,682	941	(3,245)	240	22,878	239	0	24,131	1,752	(3,245)	1
Net income (loss)	32			30		2	23				24		(1)
Other comprehensive (loss) income	(400)				(400)		(400)					(400)
Common Dividends	(103)			(103)
Dividends, Preferred Stock							(2)				(2)
Issuance of Corteva Stock	5		5				5			5
Share-based compensation	25		26	(1)			25			26	(1)
Repurchase of common stock	(200)			(200)
Other-net	(5)		(1)	(1)		(3)	(6)			(4)	(2)
Ending Balance at Sep. 30, 2021	24,979	$ 7	$ 27,712	$ 666	$ (3,645)	$ 239	22,523	$ 239	$ 0	$ 24,158	$ 1,771	$ (3,645)	$ 0
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 3,960						$ 3,960