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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
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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.

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