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Revenue Disaggregation of Revenue - Geography (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | $ 1,911 | $ 3,396 | $ 1,947 | $ 10,863 | $ 11,472
Seed [Member] |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | 681 |  | 551 | 6,347 | 6,716
Seed [Member] | North America |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales | [1] | 226 |  | 112 | 4,238 | 4,590
Seed [Member] | EMEA |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales | [2] | 122 |  | 133 | 1,200 | 1,222
Seed [Member] | Asia Pacific |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | 62 |  | 52 | 273 | 272
Seed [Member] | Latin America |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | 271 |  | 254 | 636 | 632
Crop Protection [Member] |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | 1,230 |  | 1,396 | 4,516 | 4,756
Crop Protection [Member] | North America |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales | [1] | 397 |  | 425 | 1,562 | 1,844
Crop Protection [Member] | EMEA |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales | [2] | 183 |  | 163 | 1,136 | 1,157
Crop Protection [Member] | Asia Pacific |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | 159 |  | 187 | 674 | 653
Crop Protection [Member] | Latin America |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net Sales |  | $ 491 |  | $ 621 | $ 1,144 | $ 1,102
[1] | Represents U.S. & Canada.
[2] | Europe, Middle East, and Africa ("EMEA").

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