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Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 4,474 | $ 10,735 | $ 4,474 | $ 10,750
Finite-Lived Intangible Assets, Accumulated Amortization |  | (1,043) | (1,702) | (1,043) | (1,207)
Finite-Lived Intangible Assets, Net |  | 3,431 | 9,033 | 3,431 | 9,543
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 8,236 | 1,881 | 8,236 | 1,881
Intangible Assets, Gross (Excluding Goodwill) |  | 12,710 | 12,616 | 12,710 | 12,631
Total other intangible assets |  | 11,667 | 10,914 | 11,667 | 11,424
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  | 54 |  | 54 |
Impairment of Intangible Assets Indefinite lived Excluding Goodwill After Tax |  | 41 |  | 41 |
Trade Names [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 1,871 | 1,871 | 1,871 | 1,871
In Process Research and Development [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 100 | 10 | 100 | 10
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  | 54 |  |  |
Impairment of Intangible Assets Indefinite lived Excluding Goodwill After Tax |  | 41 |  |  |
Germplasm [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | [1] | 6,265 |  | 6,265 |
Germplasm [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross | [1] |  | 6,265 |  | 6,265
Finite-Lived Intangible Assets, Accumulated Amortization | [1] |  | (253) |  | (63)
Finite-Lived Intangible Assets, Net | [1] |  | $ 6,012 |  | 6,202
Finite-Lived Intangible Asset, Useful Life |  |  | 25 years |  |
Customer-Related Intangible Assets [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 1,969 | $ 1,966 | 1,969 | 1,977
Finite-Lived Intangible Assets, Accumulated Amortization |  | (238) | (352) | (238) | (268)
Finite-Lived Intangible Assets, Net |  | 1,731 | 1,614 | 1,731 | 1,709
Developed Technology Rights [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 1,463 | 1,463 | 1,463 | 1,463
Finite-Lived Intangible Assets, Accumulated Amortization |  | (332) | (499) | (332) | (370)
Finite-Lived Intangible Assets, Net |  | 1,131 | 964 | 1,131 | 1,093
Trademarks and Trade Names [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 166 | 161 | 166 | 166
Finite-Lived Intangible Assets, Accumulated Amortization |  | (84) | (86) | (84) | (86)
Finite-Lived Intangible Assets, Net |  | 82 | 75 | 82 | 80
Favorable Supply Contract [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 475 | 475 | 475 | 475
Finite-Lived Intangible Assets, Accumulated Amortization |  | (183) | (279) | (183) | (207)
Finite-Lived Intangible Assets, Net |  | 292 | 196 | 292 | 268
Other Intangible Assets [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross | [2] | 401 | 405 | 401 | 404
Finite-Lived Intangible Assets, Accumulated Amortization | [2] | (206) | (233) | (206) | (213)
Finite-Lived Intangible Assets, Net | [2] | $ 195 | $ 172 | $ 195 | $ 191
[1] | Beginning on October 1, 2019, the company changed its indefinite life assertion of the germplasm assets to definite lived with a useful life of 25 years. This change is the result of a more focused development effort of new seed products coupled with an intent to out license select germplasm on a non-exclusive basis. Prior to changing the useful life of the germplasm assets, the company tested the assets for impairment under ASC 350 - Intangibles, Goodwill and Other, concluding the assets were not impaired.
[2] | Primarily consists of sales and farmer networks, marketing and manufacturing alliances and noncompetition agreements.

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