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Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
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Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 10,730 | $ 10,750 | $ 4,518
Finite-Lived Intangible Assets, Accumulated Amortization |  | (1,541) | (1,207) | (968)
Finite-Lived Intangible Assets, Net |  | 9,189 | 9,543 | 3,550
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 1,881 | 1,881 | 8,282
Intangible Assets, Gross (Excluding Goodwill) |  | 12,611 | 12,631 | 12,800
Total other intangible assets |  | 11,070 | 11,424 | 11,832
Trade Names [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 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) |  | 10 | 10 | 146
Germplasm [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | [1] |  |  | 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] | (190) | (63) |
Finite-Lived Intangible Assets, Net | [1] | 6,075 | 6,202 |
Customer-Related Intangible Assets [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 1,961 | 1,977 | 1,981
Finite-Lived Intangible Assets, Accumulated Amortization |  | (322) | (268) | (211)
Finite-Lived Intangible Assets, Net |  | 1,639 | 1,709 | 1,770
Developed Technology Rights [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 1,463 | 1,463 | 1,467
Finite-Lived Intangible Assets, Accumulated Amortization |  | (462) | (370) | (297)
Finite-Lived Intangible Assets, Net |  | 1,001 | 1,093 | 1,170
Trademarks and Trade Names [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 161 | 166 | 166
Finite-Lived Intangible Assets, Accumulated Amortization |  | (85) | (86) | (83)
Finite-Lived Intangible Assets, Net |  | 76 | 80 | 83
Favorable Supply Contract [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 475 | 475 | 475
Finite-Lived Intangible Assets, Accumulated Amortization |  | (255) | (207) | (159)
Finite-Lived Intangible Assets, Net |  | 220 | 268 | 316
Other Intangible Assets [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross | [2] | 405 | 404 | 429
Finite-Lived Intangible Assets, Accumulated Amortization | [2] | (227) | (213) | (218)
Finite-Lived Intangible Assets, Net | [2] | $ 178 | $ 191 | $ 211
[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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