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Pension Plans and Other Post Employment Benefit Plans Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 5 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 30, 2017 | Sep. 30, 2018 | Jun. 01, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2021
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Unfunded Status of Plan |  |  | $ 5,800 |  |  |  |
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses |  |  |  | $ 207 | $ 202 | $ 216 |
Trust Asset |  |  | 319 |  |  |  |
U.S. Retirement Savings Plan [Member] |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Employer Matching Contribution, Percent of Match |  |  |  | 100.00% |  |  |
Employer Matching Contribution, Percent of Employees' Gross Pay |  |  |  | 6.00% |  |  |
Employer Discretionary Contribution Percent |  |  |  | 3.00% |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  | $ 94 | 142 | 183 |
Employers Discretionary Contribution, Vesting Period |  |  |  | 3 years |  |  |
Corteva Other Contribution Plans [Member] |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  | $ 33 | 46 | $ 82 |
Pension Plan |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Unfunded Status of Plan |  |  |  | (3,847) | (4,063) |  |
Employer contributions |  |  |  | $ 62 | $ 121 |  |
Expected long-term rate of return on plan assets |  |  |  | 6.25% | 6.24% | 6.19% |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |  |  |  |  |
2021 |  |  |  | $ 1,456 |  |  |
Principal U.S. Pension Plan [Member] |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Employer contributions |  | $ 1,100 |  |  |  |  |
Other Post Employment Benefits Plan |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Unfunded Status of Plan |  |  |  | (1,571) | $ (2,591) |  |
Employer contributions |  |  |  | 207 | 202 |  |
Expected Future Employer Contributions, Next Fiscal Year |  |  |  |  |  |  | $ 217
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |  |  |  |  |
2021 |  |  |  | 140 |  |  |
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment |  |  |  | (939) |  |  |
Other Pension Plan [Member] |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Employer contributions |  |  |  | 62 | 121 | $ 214 |
Expected Future Employer Contributions, Next Fiscal Year |  |  |  |  |  |  | $ 47
Nonqualified Plan [Member] | Trust Agreement [Member] |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Contributions to Trust | $ 571 |  |  |  |  |  |
Trust Asset Distribution |  |  | $ 39 | 65 | 62 |  |
Trust Asset |  |  |  | $ 347 | 409 |  |
Discontinued Operations [Member] | Corteva Other Contribution Plans [Member] |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  |  | $ 73 | $ 148 |

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