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v3.22.2.2

Revenue Recognition - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |  |  |
Accounts receivable, credit loss expense (reversal) |  | $ 0 |  | $ 0 |
Revenue | $ 1,342,500,000 | 679,000,000.0 | $ 3,355,800,000 | 2,053,700,000 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue | 1,342,500,000 | 679,000,000.0 | 3,355,800,000 | 2,053,700,000 |
Corporate and Other (1) |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 126,700,000 | (192,900,000) | (230,100,000) | (185,600,000) |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue | 126,700,000 | (192,900,000) | (230,100,000) | (185,600,000) |
Designated as Hedging Instrument |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Unrealized (loss) gain recognized in income on derivatives | 88,800,000 | (237,800,000) | (229,400,000) | (271,500,000) |
Trade receivables |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Accounts receivable, allowance for credit loss | 0 |  | 0 |  | $ 0
Accounts receivable, allowance for credit loss | 0 |  | 0 |  | 0
Miscellaneous Receivables |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Accounts receivable, allowance for credit loss | 0 |  | 0 |  | 0
Accounts receivable, allowance for credit loss | 0 |  | 0 |  | $ 0
Coal Contract and Physical commodity purchase / sale contracts | Designated as Hedging Instrument |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Unrealized (loss) gain recognized in income on derivatives | $ 90,400,000 | $ (238,400,000) | $ (235,100,000) | $ (264,000,000.0) |

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