Pension Plans and Other Post Employment Benefit Plans Basis of Fair Value Measurement (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 10,630		$ 11,755		$ 12,584
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,444		2,693
Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,761		6,147
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	162		121		204
Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,546		2,924
Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets, Excluding Trust Receivables and payables and assets measured at NAV	8,367		8,961
Defined Benefit Plan, Cash | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,030		1,148
Defined Benefit Plan, Cash | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Defined Benefit Plan, Cash | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Defined Benefit Plan, Cash | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,030		1,148
Defined Benefit Plan, Equity Securities, US | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,026	[1]	1,106	[2]
Defined Benefit Plan, Equity Securities, US | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	[1]	1	[2]
Defined Benefit Plan, Equity Securities, US | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	[1]	1	[2]	3
Defined Benefit Plan, Equity Securities, US | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21		19
Defined Benefit Plan, Equity Securities, US | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,030	[1]	1,108	[2]
Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	388		439
Defined Benefit Plan, Equity Securities, Non-US | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1		2		0
Defined Benefit Plan, Equity Securities, Non-US | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20		21
Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	389		441
US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
US Treasury and Government [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,628		1,601
US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
US Treasury and Government [Member] | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39		42
US Treasury and Government [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,628		1,601
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Corporate Debt Securities [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,540		3,906
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		2		0
Corporate Debt Securities [Member] | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		3
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,540		3,908
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Asset-backed Securities [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	590		637
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	590		637
Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Hedge Funds [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2		2
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		3		3
Hedge Funds [Member] | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11		143
Hedge Funds [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5		5
Private Market Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Private Market Securities [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Private Market Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		6		4
Private Market Securities [Member] | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,810		1,928
Private Market Securities [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		6
Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Real Estate [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	101		52		132
Real Estate [Member] | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	642		768
Real Estate [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	101		52
Other Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Other Investments [Member] | Fair value of the company's long-term borrowings, including long-term debt due within one year
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Other Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51		55		$ 62
Other Investments [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51		55
Pension trust receivables | Other Reconciling Items
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	79	[3]	315	[4]
Pension trust payables | Other Reconciling Items
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ (362)	[5]	$ (445)	[6]
Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Amount of Employer and Related Party Securities Included in Plan Assets, Percent	1.00%		2.00%
Common Stock [Member] | Defined Benefit Plan, Equity Securities, US
Defined Benefit Plan Disclosure [Line Items]
Amount of Employer and Related Party Securities Included in Plan Assets	$ 132		$ 204

[1] The Corteva pension plans directly held $132 million (approximately 1 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2024.

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

[3] Primarily receivables for investments securities sold.

[4] Primarily receivables for investments securities sold.

[5] Primarily payables for investment securities purchased.

[6] Primarily payables for investment securities purchased.