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Business Segments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Gross Profit |  | $ 1,498.4 | $ 842.8 | $ 810.0
Canadian Resource Taxes |  | 159.4 | 70.1 | 101.1
Gross Profit Excluding Canadian Resource Taxes |  | 1,657.8 | 912.9 | 911.1
Operating Income (Loss) |  | 928.3 | 465.7 | 319.0
Payments to Acquire Property, Plant, and Equipment |  | 954.5 | 820.1 | 843.1
Depreciation, Depletion and Amortization |  | 883.9 | 665.5 | 711.2
Equity in net (loss) earnings of nonconsolidated companies |  | (4.5) | 16.7 | (15.4)
Assets |  | 20,119.2 | 18,633.4 | 16,840.7
Corporate Eliminations And Other Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross Profit | [1] | (63.2) | (9.6) | 78.6
Canadian Resource Taxes | [1] | 0.0 | 0.0 | 0.0
Gross Profit Excluding Canadian Resource Taxes | [1] | (63.2) | (9.6) | 78.6
Operating Income (Loss) | [1] | (167.6) | (70.3) | 67.6
Payments to Acquire Property, Plant, and Equipment | [1] | 1.9 | 14.8 | 22.7
Depreciation, Depletion and Amortization | [1] | 20.2 | 23.4 | 25.0
Equity in net (loss) earnings of nonconsolidated companies | [1] | 0.1 | 0.7 | 0.0
Assets | [1] | 526.4 | 1,254.4 | 133.4
Corporate Eliminations And Other Segment [Member] | China and India distribution operations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross Profit |  | 42.8 | 46.9 | 21.2
Phosphates Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross Profit |  | 581.5 | 332.2 | 349.8
Canadian Resource Taxes |  | 0.0 |  | 0.0
Gross Profit Excluding Canadian Resource Taxes |  | 581.5 | 332.2 | 349.8
Operating Income (Loss) |  | 414.8 | 191.6 | 47.8
Payments to Acquire Property, Plant, and Equipment |  | 393.9 | 401.0 | 380.0
Depreciation, Depletion and Amortization |  | 403.7 | 338.0 | 362.4
Equity in net (loss) earnings of nonconsolidated companies |  | (4.6) | 16.0 | 0.2
Assets |  | 7,877.3 | 7,700.6 | 7,679.7
Potash Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross Profit |  | 597.2 | 391.6 | 256.6
Canadian Resource Taxes |  | 159.4 | 70.1 | 101.1
Gross Profit Excluding Canadian Resource Taxes |  | 756.6 | 461.7 | 357.7
Operating Income (Loss) |  | 454.1 | 281.3 | 138.8
Payments to Acquire Property, Plant, and Equipment |  | 410.5 | 371.6 | 416.7
Depreciation, Depletion and Amortization |  | 301.5 | 287.2 | 308.7
Equity in net (loss) earnings of nonconsolidated companies |  | 0.0 | 0.0 | (15.5)
Assets |  | 7,763.1 | 8,301.7 | 7,777.9
Mosaic Fertilizantes [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross Profit |  | 382.9 | 128.6 | 125.0
Canadian Resource Taxes |  | 0.0 | 0.0 | 0.0
Gross Profit Excluding Canadian Resource Taxes |  | 382.9 | 128.6 | 125.0
Operating Income (Loss) |  | 227.0 | 63.1 | 64.8
Payments to Acquire Property, Plant, and Equipment |  | 148.2 | 32.7 | 23.7
Depreciation, Depletion and Amortization |  | 158.5 | 16.9 | 15.1
Equity in net (loss) earnings of nonconsolidated companies |  | 0.0 | 0.0 | (0.1)
Assets |  | 3,952.4 | 1,376.7 | 1,249.7
Product |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 9,587.3 | 7,409.4 | 7,162.8
Product | Corporate Eliminations And Other Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | [1] | (220.0) | (252.5) | (347.7)
Product | Corporate Eliminations And Other Segment [Member] | China and India distribution operations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 533.9 | 493.2 | 419.6
Product | Phosphates Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 3,886.3 | 3,589.2 | 3,710.9
Product | Potash Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 2,173.9 | 1,852.6 | 1,685.7
Product | Mosaic Fertilizantes [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 3,747.1 | 2,220.1 | 2,113.9
Product | Operating Segments [Member] | Corporate Eliminations And Other Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | [1] | 579.1 | 526.2 | 447.5
Product | Operating Segments [Member] | Phosphates Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 3,106.3 | 2,826.6 | 2,928.4
Product | Operating Segments [Member] | Potash Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 2,154.8 | 1,836.5 | 1,673.0
Product | Operating Segments [Member] | Mosaic Fertilizantes [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 3,747.1 | 2,220.1 | 2,113.9
Product | Intersegment Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 0.0 | 0.0 | 0.0
Product | Intersegment Eliminations [Member] | Corporate Eliminations And Other Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | [1] | (799.1) | (778.7) | (795.2)
Product | Intersegment Eliminations [Member] | Phosphates Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 780.0 | 762.6 | 782.5
Product | Intersegment Eliminations [Member] | Potash Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 19.1 | 16.1 | 12.7
Product | Intersegment Eliminations [Member] | Mosaic Fertilizantes [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | $ 0.0 | $ 0.0 | $ 0.0
[1] | The "Corporate, Eliminations and Other" category includes the results of our ancillary distribution operations in India and China. For the years ended December 31, 2018, 2017 and 2016, distribution operations in India and China had revenues of $533.9 million, $493.2 million, and $419.6 million, respectively and gross margins of $42.8 million, $46.9 million, and $21.2 million, respectively.

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