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Derivative - Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative [Line Items] |  |
Due to affiliates | $ 65.8 | $ 21.7
Due to affiliates - less current portion | 21.9 | 0.1
Commodity Contract | Glencore |  |
Derivative [Line Items] |  |
Due to affiliates | 17.1 | 11.3
Due to affiliates - less current portion | 21.9 | 0.1
Due from affiliate, current |  | 1.2
Due from affiliate, noncurrent |  | 1.7
Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Asset Fair Value | 42.9 | 15.2
Liability Fair Value | 146.2 | 16.7
Not Designated as Hedging Instrument | Commodity Contract |  |
Derivative [Line Items] |  |
Asset Fair Value | 42.9 | 12.8
Liability Fair Value | 143.3 | 16.7
Not Designated as Hedging Instrument | Foreign Exchange Contract |  |
Derivative [Line Items] |  |
Asset Fair Value | 0.0 | 2.4
Liability Fair Value | $ 2.9 | $ 0.0

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