Earnings Per Share Net Income for Earnings Per Share Calculations - Basic and Diluted (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations After Taxes	$ 1,822	$ 756	$ (270)
Income (loss) from continuing operations attributable to Corteva common stockholders	1,812	736	(283)
(Loss) income from discontinued operations after income taxes	(53)	(55)	(671)
Loss from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest	0	0	5
(Loss) income from discontinued operations attributable to Corteva common stockholders	(53)	(55)	(676)
Net (Loss) Income attributable to common stockholders	1,759	681	(959)
Net Income attributable to continuing operations - Noncontrolling Interest	$ 10	$ 20	$ 13