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v3.20.2

Intangible Contract Assets and Liabilities - Balances and Balance Sheet Classifications (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Assets | $ 10.1 |  | $ 10.1 |  | $ 20.7
Liabilities | (52.7) |  | (52.7) |  | (61.4)
Finite-Lived Liabilities, Net | (42.6) |  | (42.6) |  | (40.7)
Investments and other assets |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Assets | 10.1 |  | 10.1 |  | 20.7
Liabilities | 0.0 |  | 0.0 |  | 0.0
Finite-Lived Assets, Net | (10.1) |  | (10.1) |  | (20.7)
Accounts payable and accrued expenses |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Assets | 0.0 |  | 0.0 |  | 0.0
Liabilities | (4.7) |  | (4.7) |  | (8.4)
Finite-Lived Liabilities, Net | (4.7) |  | (4.7) |  | (8.4)
Other noncurrent liabilities |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Assets | 0.0 |  | 0.0 |  | 0.0
Liabilities | (48.0) |  | (48.0) |  | (53.0)
Finite-Lived Liabilities, Net | (48.0) |  | (48.0) |  | (53.0)
Coal supply agreements |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Liabilities | (19.0) |  | (19.0) |  | (21.4)
Take-or-pay contracts |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Liabilities | (33.7) |  | (33.7) |  | (40.0)
Finite-Lived Liabilities, Net | (33.7) |  | (33.7) |  | (40.0)
Coal supply agreements |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Assets | 10.1 |  | 10.1 |  | 20.7
Finite-Lived Assets, Net | (8.9) |  | (8.9) |  | (0.7)
Presented periods amortization | 1.3 | $ 6.8 | 3.7 | $ 11.6 |
Take-or-pay contracts |  |  |  |  |
Fresh-Start Adjustment [Line Items] |  |  |  |  |
Assets | $ 0.0 |  | $ 0.0 |  | $ 0.0

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