Pension Plans and Other Post Employment Benefit Plans Summary of Fair Value Measurement of Level 3 Pension Plan Assets (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 12,584		$ 17,827		$ 17,835
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	204		110		115
Actual Return (Loss) on Plan Assets Sold	(23)		(5)
Actual Return (Loss) on Plan Assets Still Held	9		(2)
Purchases, Sales, and Settlements	(14)		2
Assets Transferred into (out of) Level 3	122
Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,822		4,591
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		2		3
Actual Return (Loss) on Plan Assets Sold	(15)		(5)
Actual Return (Loss) on Plan Assets Still Held	13		6
Purchases, Sales, and Settlements	0		(2)
Assets Transferred into (out of) Level 3	0
Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	695		682
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		0		0
Actual Return (Loss) on Plan Assets Sold	0		0
Actual Return (Loss) on Plan Assets Still Held	(8)		0
Purchases, Sales, and Settlements	0		0
Assets Transferred into (out of) Level 3	11
Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4		3
Private Market Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4		3		3
Actual Return (Loss) on Plan Assets Sold	(9)		0
Actual Return (Loss) on Plan Assets Still Held	10		0
Purchases, Sales, and Settlements	0		0
Assets Transferred into (out of) Level 3	0
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	132		26
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	132		26		28
Actual Return (Loss) on Plan Assets Sold	0		0
Actual Return (Loss) on Plan Assets Still Held	8		(2)
Purchases, Sales, and Settlements	(1)		0
Assets Transferred into (out of) Level 3	99
Derivative, Asset [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62		78
Derivative, Asset [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62		75		73
Actual Return (Loss) on Plan Assets Sold	0		0
Actual Return (Loss) on Plan Assets Still Held	(1)		(2)
Purchases, Sales, and Settlements	(12)		4
Assets Transferred into (out of) Level 3	0
Non-US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	806		1,523
Non-US [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0		3
Actual Return (Loss) on Plan Assets Sold	0		(1)
Actual Return (Loss) on Plan Assets Still Held	(13)		(1)
Purchases, Sales, and Settlements	1		(1)
Assets Transferred into (out of) Level 3	12
UNITED STATES | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,200	[1]	2,400	[2]
UNITED STATES | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	[1]	4	[2]	$ 5
Actual Return (Loss) on Plan Assets Sold	1		1
Actual Return (Loss) on Plan Assets Still Held	0		(3)
Purchases, Sales, and Settlements	(2)		$ 1
Assets Transferred into (out of) Level 3	$ 0

[1] The Corteva pension plans directly held $250 million (approximately 2 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2022.

[2] The Corteva pension plans directly held $201 million (approximately 1 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2021.