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Pension Plans and Other Post Employment Benefit Plans Basis of Fair Value Measurement (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | $ 11,755 |  | $ 12,584 |  | $ 17,827
Fair Value of Plan Assets, Excluding Trust Receivables and payables and assets measured at NAV |  | 8,961 |  |  |  |
Pension Plan | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 2,693 |  | 3,349 |  |
Pension Plan | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 6,147 |  | 6,190 |  |
Pension Plan | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 121 |  | 204 |  | 110
Pension Plan | Fair Value Measured at Net Asset Value Per Share |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 3,085 |  |
Pension Plan | Fair Value, Inputs, Level 1, Level 2, and Level 3 |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 9,743 |  |
Pension Plan | Defined Benefit Plan, Cash |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1,148 |  |  |  |
Pension Plan | Defined Benefit Plan, Cash | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1,148 |  | 1,348 |  |
Pension Plan | Defined Benefit Plan, Cash | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Defined Benefit Plan, Cash | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | 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 |  |  |  | 1,348 |  |
Pension Plan | Defined Benefit Plan, Equity Securities, US |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets | [1] | 1,108 |  |  |  |
Pension Plan | Defined Benefit Plan, Equity Securities, US | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1,106 | [1] | 1,195 | [2] |
Pension Plan | Defined Benefit Plan, Equity Securities, US | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1 | [1] | 2 | [2] |
Pension Plan | 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
Pension Plan | 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 |  | 19 |  | 20 |  |
Pension Plan | 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 | [2] |  |  | 1,200 |  |
Pension Plan | Defined Benefit Plan, Equity Securities, Non-US |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 441 |  |  |  |
Pension Plan | Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 439 |  | 806 |  |
Pension Plan | Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | 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
Pension Plan | 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 |  | 21 |  | 20 |  |
Pension Plan | 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 |  |  |  | 806 |  |
Pension Plan | US Treasury and Government [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1,601 |  |  |  |
Pension Plan | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1,601 |  | 1,669 |  |
Pension Plan | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | 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 |  | 42 |  | 35 |  |
Pension Plan | 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 |  |  |  | 1,669 |  |
Pension Plan | Corporate Debt Securities [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 3,908 |  |  |  |
Pension Plan | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 3,906 |  | 3,822 |  |
Pension Plan | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 2 |  | 0 |  | 2
Pension Plan | 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 |  |
Pension Plan | 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 |  |  |  | 3,822 |  |
Pension Plan | Asset-backed Securities [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 637 |  |  |  |
Pension Plan | Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 637 |  | 695 |  |
Pension Plan | Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | 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 |  |  |  | 695 |  |
Pension Plan | Hedge Funds [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 5 |  |  |  |
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 2 |  | 0 |  |
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 3 |  | 3 |  | 0
Pension Plan | Hedge Funds [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 143 |  | 347 |  |
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3 |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 3 |  |
Pension Plan | Private Market Securities [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 6 |  |  |  |
Pension Plan | Private Market Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Private Market Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Private Market Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 6 |  | 4 |  | 3
Pension Plan | Private Market Securities [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 1,928 |  | 1,991 |  |
Pension Plan | 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 |  |  |  | 4 |  |
Pension Plan | Real Estate [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 52 |  |  |  |
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  | 0 |  |
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 52 |  | 132 |  | 26
Pension Plan | Real Estate [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 768 |  | 669 |  |
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3 |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 132 |  |
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 0 |  |
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 2 |  |
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 0 |  |
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 1, Level 2, and Level 3 |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 2 |  |
Pension Plan | Other Investments [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 55 |  |  |  |
Pension Plan | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  |  |  |
Pension Plan | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 0 |  |  |  |
Pension Plan | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 55 |  |  |  |
Pension Plan | Other Contract | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 0 |  |
Pension Plan | Other Contract | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 0 |  |
Pension Plan | Other Contract | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 55 |  | 62 |  | $ 75
Pension Plan | Other Contract | Fair Value, Inputs, Level 1, Level 2, and Level 3 |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 62 |  |
Pension Plan | Pension trust receivables |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets | [3] | 315 |  |  |  |
Pension Plan | Pension trust receivables | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Other Reconciling Items |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets | [4] |  |  | 161 |  |
Pension Plan | Pension trust payables |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets | [5] | (445) |  |  |  |
Pension Plan | Pension trust payables | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Other Reconciling Items |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets | [6] |  |  | $ (405) |  |
Pension Plan | Plan Assets Total Investments Measured At NAV | Fair Value Measured at Net Asset Value Per Share |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | $ 2,924 |  |  |  |
Common Stock [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Amount of Employer and Related Party Securities Included in Plan Assets, Percent |  | 2.00% |  |  |  |
Common Stock [Member] | Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Amount of Employer and Related Party Securities Included in Plan Assets, Percent |  |  |  | 2.00% |  |
Common Stock [Member] | Pension Plan | Defined Benefit Plan, Equity Securities, US |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Amount of Employer and Related Party Securities Included in Plan Assets |  | $ 204 |  | $ 250 |  |
[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.
[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.

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