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v3.20.1

Intangible Contract Assets and Liabilities - Balances and Balance Sheet Classifications (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fresh-Start Adjustment [Line Items] |  |
Assets | $ 16.8 | $ 20.7
Liabilities | (52.8) | (61.4)
Finite-Lived Liabilities, Net | (36.0) | (40.7)
Investments and other assets |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 16.8 | 20.7
Liabilities | 0.0 | 0.0
Finite-Lived Assets, Net | (16.8) | (20.7)
Accounts payable and accrued expenses |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 0.0 | 0.0
Liabilities | (5.9) | (8.4)
Finite-Lived Liabilities, Net | (5.9) | (8.4)
Other noncurrent liabilities |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 0.0 | 0.0
Liabilities | (46.9) | (53.0)
Finite-Lived Liabilities, Net | (46.9) | (53.0)
Coal supply agreements |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities | (19.9) | (21.4)
Take-or-pay contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities | (32.9) | (40.0)
Finite-Lived Liabilities, Net | (32.9) | (40.0)
Coal supply agreements |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 16.8 | 20.7
Finite-Lived Assets, Net | (3.1) | (0.7)
Take-or-pay contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | $ 0.0 | $ 0.0

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