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Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | $ 2,381.5 | $ 2,753.4 | $ 6,224.3 | $ 6,830.0
Potash Crop Nutrients | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 727.3 | 891.9 | 1,856.3 | 2,175.9
Phosphate Crop Nutrients | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 677.0 | 736.7 | 1,783.8 | 1,904.6
Crop Nutrient Blends | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 376.5 | 509.0 | 915.8 | 1,089.8
Specialty Products | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 361.3 | 356.9 | 914.2 | 895.1
Phosphate Rock | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 14.5 | 14.1 | 28.5 | 33.5
Other Product Types | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 224.9 | 244.8 | 725.7 | 731.1
Product |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 2,381.5 | 2,753.4 | 6,224.3 | 6,830.0
Brazil | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 1,109.7 | 1,347.3 | 2,579.4 | 2,831.0
Canpotex [Member] | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 192.8 | 272.1 | 555.0 | 811.4
Canada | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 122.2 | 157.0 | 376.9 | 435.3
India | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 104.0 | 85.2 | 242.0 | 185.3
China | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 96.8 | 48.8 | 210.7 | 172.7
Australia | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 10.6 | 12.0 | 51.9 | 68.1
Mexico | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 23.5 | 28.6 | 71.2 | 108.8
Colombia | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 21.1 | 28.7 | 61.1 | 67.3
Paraguay | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 28.3 | 38.7 | 71.0 | 86.2
Japan | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 15.9 | 1.8 | 60.4 | 10.8
Peru | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 26.1 | 27.1 | 32.1 | 73.3
Argentina | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 36.9 | 25.3 | 120.0 | 97.7
Honduras | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 4.3 | 3.6 | 21.8 | 11.7
Thailand | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 4.8 | 5.6 | 13.9 | 18.8
Other Foreign | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 17.2 | 35.0 | 67.0 | 89.7
Total Foreign | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 1,814.2 | 2,116.8 | 4,534.4 | 5,068.1
United States | Product | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | $ 567.3 | $ 636.6 | $ 1,689.9 | $ 1,761.9

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