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, 2023		Dec. 31, 2022		Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 11,755		$ 12,584		$ 17,827
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		121		204		110
Actual Return (Loss) on Plan Assets Sold		(10)		(23)
Actual Return (Loss) on Plan Assets Still Held		(13)		9
Purchases, Sales, and Settlements		(41)		(14)
Assets Transferred into (out of) Level 3		(19)		122
Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,908
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2		0		2
Actual Return (Loss) on Plan Assets Sold		0		(15)
Actual Return (Loss) on Plan Assets Still Held		(5)		13
Purchases, Sales, and Settlements		7		0
Assets Transferred into (out of) Level 3		0		0
Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		637
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		5
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3		3		0
Actual Return (Loss) on Plan Assets Sold		0		0
Actual Return (Loss) on Plan Assets Still Held		0		(8)
Purchases, Sales, and Settlements		0		0
Assets Transferred into (out of) Level 3		0		11
Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6
Private Market Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6		4		3
Actual Return (Loss) on Plan Assets Sold		0		(9)
Actual Return (Loss) on Plan Assets Still Held		2		10
Purchases, Sales, and Settlements		0		0
Assets Transferred into (out of) Level 3		0		0
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		52
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		52		132		26
Actual Return (Loss) on Plan Assets Sold		0		0
Actual Return (Loss) on Plan Assets Still Held		(24)		8
Purchases, Sales, and Settlements		(35)		(1)
Assets Transferred into (out of) Level 3		(21)		99
Derivative, Asset [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		55
Derivative, Asset [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		55
Defined Benefit Plan, Equity Securities, US
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	1,108
Defined Benefit Plan, Equity Securities, US | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	[1]	3	[2]	4
Actual Return (Loss) on Plan Assets Sold		(1)		1
Actual Return (Loss) on Plan Assets Still Held		0		0
Purchases, Sales, and Settlements		(1)		(2)
Assets Transferred into (out of) Level 3		0		0
Defined Benefit Plan, Equity Securities, Non-US
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		441
Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2		0		0
Actual Return (Loss) on Plan Assets Sold		(9)		0
Actual Return (Loss) on Plan Assets Still Held		10		(13)
Purchases, Sales, and Settlements		1		1
Assets Transferred into (out of) Level 3		0		12
Other Contract | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		55		62		$ 75
Actual Return (Loss) on Plan Assets Sold		0		0
Actual Return (Loss) on Plan Assets Still Held		4		(1)
Purchases, Sales, and Settlements		(13)		(12)
Assets Transferred into (out of) Level 3		$ 2		$ 0

[1] The Corteva pension plans directly held $204 million (approximately 2 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2023.

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