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v3.19.2

Intangible Contract Assets and Liabilities - Balances and Balance Sheet Classifications (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Fresh-Start Adjustment [Line Items] |  |
Assets | $ 51.9 | $ 70.9
Liabilities | (71.1) | (90.0)
Finite-Lived Liabilities, Net | (19.2) | (19.1)
Investments and other assets |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 51.9 | 70.9
Liabilities | 0.0 | 0.0
Finite-Lived Assets, Net | 51.9 | 70.9
Accounts payable and accrued expenses |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 0.0 | 0.0
Liabilities | (11.2) | (20.3)
Finite-Lived Liabilities, Net | (11.2) | (20.3)
Other noncurrent liabilities |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 0.0 | 0.0
Liabilities | (59.9) | (69.7)
Finite-Lived Liabilities, Net | (59.9) | (69.7)
Coal supply agreements |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities | (25.5) | (32.9)
Take-or-pay contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities | (45.6) | (57.1)
Finite-Lived Liabilities, Net | (45.6) | (57.1)
Coal supply agreements |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 51.9 | 70.9
Finite-Lived Assets, Net | 26.4 | 38.0
Take-or-pay contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | $ 0.0 | $ 0.0

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