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Supplementary Information Other Income (Expense) - Net (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Equity in earnings / (losses) of affiliates - net |  | $ 3 | $ (1)
Net gain (loss) on sales of businesses and other assets | [1] | 0 | (46)
Net exchange gains (losses) | [2] | (35) | (61)
Non-operating pension and other post employment benefit credit | [3] | 325 | 91
Miscellaneous expenses - net | [4] | 23 | 0
Other income - net |  | 337 | 1
Interest income |  | 21 | 18
Hedging Program [Member] |  |  |
Net exchange gains (losses) |  | 16 | 165
Hedging Program [Member] | Argentine Peso Devaluation [Member] |  |  |
Net exchange gains (losses) |  | (23) | (9)
Subsidiary Monetary Position |  |  |
Net exchange gains (losses) |  | (51) | (226)
Segment Reconciling Items [Member] |  |  |
Net exchange gains (losses) |  | 35 | 61
Non-operating pension and other post employment benefit credit |  | (311) | (73)
Interest income |  | (21) | $ (18)
Segment Reconciling Items [Member] | Crop Protection [Member] |  |  |
Gain (Loss) on Disposition of Assets |  | $ (53) |
[1] | The three months ended March 31, 2020 includes a loss of $(53) million relating to the sale of the La Porte site, for which the company signed an agreement in 2020, and closed during the first quarter of 2021.2.Includes net pre-tax exchange losses of $(23) million and $(9) million associated with the devaluation of the Argentine peso for the three months ended March 31, 2021 and 2020, respectively.
[2] | Includes net pre-tax exchange losses of $(23) million and $(9) million associated with the devaluation of the Argentine peso for the three months ended March 31, 2021 and 2020, respectively.
[3] | Includes non-service related components of net periodic benefit credits (costs) (interest cost, expected return on plan assets, amortization of unrecognized gain (loss), amortization of prior service benefit and settlement loss).
[4] | Miscellaneous income - net, includes a gain from a remeasurement of an equity investment, losses on sale of available-for-sale securities, tax indemnification adjustments related to changes in indemnification balances as a result of the application of the terms of the Tax Matters Agreement between Corteva and Dow and/or DuPont, losses on sale of receivables, and other items.

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- Definition Amount of other net periodic benefit cost (credit) for defined benefit plan. Includes non-operating cost components for defined benefit pension and other post employment benefit plans (interest cost, expected return on plan assets, amortization of unrecognized loss, amortization of prior service benefit) + References No definition available. + Details
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