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Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) and amounts recognized in other comprehensive loss (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  | $ (31) |
Pension Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Service Cost |  | $ 25 | 26 | $ 41
Interest Cost |  | 364 | 559 | 769
Expected return on plan assets |  | (915) | (1,000) | (1,078)
Amortization of unrecognized loss (gain) |  | 55 | 4 | 3
Amortization of prior service benefit |  | (2) | (1) | (1)
Curtailment gain |  | 0 | 0 | (2)
Settlement loss |  | 1 | 3 | 4
Net periodic benefit cost (credit) |  | (472) | (409) | (264)
Net loss (gain) |  | 1,284 | (247) | (970)
Amortization of unrecognized (loss) gain |  | 55 | 4 | 2
Prior service cost (benefit) |  | 15 | 3 | 11
Amortization of prior service benefit |  | (2) | (1) | (1)
Settlement loss |  | 1 | 3 | 4
Effect of foreign exchange rates |  | 3 | (2) | 5
Total (benefit) loss recognized in other comprehensive loss, attributable to Corteva |  | 1,356 | (240) | (949)
Total recognized in net periodic benefit cost and other comprehensive (income) loss |  | 1,828 | 169 | (685)
Other Post Employment Benefits Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Service Cost |  | 1 | 2 | 4
Interest Cost |  | 21 | 66 | 84
Expected return on plan assets |  | 0 | 0 | 0
Amortization of unrecognized loss (gain) |  | 81 | 1 | (1)
Amortization of prior service benefit |  | (922) | 0 | 0
Curtailment gain |  | (1) | 0 | 0
Settlement loss |  | 0 | 0 | 0
Net periodic benefit cost (credit) |  | (820) | 69 | 87
Net loss (gain) |  | 33 | (59) | (211)
Amortization of unrecognized (loss) gain |  | 81 | 1 | (1)
Prior service cost (benefit) |  | 0 | 939 | 0
Amortization of prior service benefit |  | (922) | 0 | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax |  | (1) | 0 | 0
Settlement loss |  | 0 | 0 | 0
Effect of foreign exchange rates |  | 0 | 1 | 0
Total (benefit) loss recognized in other comprehensive loss, attributable to Corteva |  | (809) | 882 | (212)
Total recognized in net periodic benefit cost and other comprehensive (income) loss |  | 11 | 813 | (299)
Discontinued Operations [Member] | Pension Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Net periodic benefit cost (credit) | [1] | 0 | 0 | (14)
Discontinued Operations [Member] | Other Post Employment Benefits Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Net periodic benefit cost (credit) | [1] | 0 | 0 | 0
Continuing Operations [Member] | Pension Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Net periodic benefit cost (credit) |  | (472) | (409) | (250)
Continuing Operations [Member] | Other Post Employment Benefits Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Net periodic benefit cost (credit) |  | $ (820) | $ 69 | $ 87
[1] | Includes non-service related components of net periodic benefit credit of $(31) million for the year ended December 31, 2019.

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- Definition Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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