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% | | | | |
Common Stock [Member] | Pension Plan | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | |
Amount of Employer and Related Party Securities Included in Plan Assets, Percent | | | | 2% | | |
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 | | |
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[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. The Corteva pension plans directly held $250 million (approximately 2 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2022. Primarily receivables for investments securities sold. Primarily receivables for investments securities sold. Primarily payables for investment securities purchased. Primarily payables for investment securities purchased. | |