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, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 13	$ 16	$ 18
Interest Cost	627	648	690
Expected return on plan assets	(622)	(531)	(605)
Amortization of unrecognized loss (gain)	0	1	0
Amortization of prior service benefit	(4)	(4)	(3)
Settlement loss	0	2	0
Net periodic benefit cost (credit)	14	132	100
Net loss (gain)	(199)	164	(255)
Amortization of unrecognized (loss) gain	0	1	0
Prior service cost (benefit)	(1)	0	0
Amortization of prior service benefit	(4)	(4)	(3)
Settlement loss	0	2	0
Effect of foreign exchange rates	1	(1)	8
Total (benefit) loss recognized in other comprehensive loss, attributable to Corteva	(203)	162	(250)
Total recognized in net periodic benefit cost and other comprehensive (income) loss	(217)	30	(350)
Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0	0	1
Interest Cost	40	42	49
Expected return on plan assets	0	0	0
Amortization of unrecognized loss (gain)	(17)	(13)	(10)
Amortization of prior service benefit	(1)	(1)	(2)
Settlement loss	0	0	0
Net periodic benefit cost (credit)	22	28	38
Net loss (gain)	(15)	51	49
Amortization of unrecognized (loss) gain	(17)	(13)	(10)
Prior service cost (benefit)	0	1	0
Amortization of prior service benefit	(1)	(1)	(2)
Settlement loss	0	0	0
Effect of foreign exchange rates	0	0	1
Total (benefit) loss recognized in other comprehensive loss, attributable to Corteva	(33)	38	38
Total recognized in net periodic benefit cost and other comprehensive (income) loss	$ (55)	$ 10	$ 0