Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) and amounts recognized in other comprehensive loss (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			$ (31)
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost		$ 25	26	$ 41
Interest Cost		364	559	769
Expected return on plan assets		(915)	(1,000)	(1,078)
Amortization of unrecognized loss (gain)		55	4	3
Amortization of prior service benefit		(2)	(1)	(1)
Curtailment gain		0	0	(2)
Settlement loss		1	3	4
Net periodic benefit cost (credit)		(472)	(409)	(264)
Net loss (gain)		1,284	(247)	(970)
Amortization of unrecognized (loss) gain		55	4	2
Prior service cost (benefit)		15	3	11
Amortization of prior service benefit		(2)	(1)	(1)
Settlement loss		1	3	4
Effect of foreign exchange rates		3	(2)	5
Total (benefit) loss recognized in other comprehensive loss, attributable to Corteva		1,356	(240)	(949)
Total recognized in net periodic benefit cost and other comprehensive (income) loss		1,828	169	(685)
Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost		1	2	4
Interest Cost		21	66	84
Expected return on plan assets		0	0	0
Amortization of unrecognized loss (gain)		81	1	(1)
Amortization of prior service benefit		(922)	0	0
Curtailment gain		(1)	0	0
Settlement loss		0	0	0
Net periodic benefit cost (credit)		(820)	69	87
Net loss (gain)		33	(59)	(211)
Amortization of unrecognized (loss) gain		81	1	(1)
Prior service cost (benefit)		0	939	0
Amortization of prior service benefit		(922)	0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax		(1)	0	0
Settlement loss		0	0	0
Effect of foreign exchange rates		0	1	0
Total (benefit) loss recognized in other comprehensive loss, attributable to Corteva		(809)	882	(212)
Total recognized in net periodic benefit cost and other comprehensive (income) loss		11	813	(299)
Discontinued Operations [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)	[1]	0	0	(14)
Discontinued Operations [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)	[1]	0	0	0
Continuing Operations [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)		(472)	(409)	(250)
Continuing Operations [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)		$ (820)	$ 69	$ 87

[1] Includes non-service related components of net periodic benefit credit of $(31) million for the year ended December 31, 2019.