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Business Segments - Additional Information (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2017 USD ($) segment | Mar. 31, 2016 USD ($)
Segment Reporting Information [Line Items] |  |
Number of reportable segments | segment | 2 |
Net sales | $ 1,507.1 | $ 905.5
Cost of materials and other | 1,221.2 | 736.8
Intersegment elimination |  |
Segment Reporting Information [Line Items] |  |
Net sales | (1.7) | (1.6)
Cost of materials and other | (1.9) | (1.8)
Intersegment elimination | Petroleum |  |
Segment Reporting Information [Line Items] |  |
Net sales | (0.4) | (0.4)
Cost of materials and other | (0.1) | (1.1)
Intersegment elimination | Nitrogen Fertilizer |  |
Segment Reporting Information [Line Items] |  |
Net sales | (1.2) | (1.1)
Cost of materials and other | $ (0.5) | $ (0.7)

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- Details
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- Details
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