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v3.19.1

Intangible Contract Assets and Liabilities - Balances and Balance Sheet Classifications (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fresh-Start Adjustment [Line Items] |  |
Assets | $ 60.5 | $ 70.9
Liabilities | (79.1) | (90.0)
Finite-Lived Liabilities, Net | (18.6) | (19.1)
Investments and other assets |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 60.5 | 70.9
Liabilities | 0.0 | 0.0
Finite-Lived Assets, Net | 60.5 | 70.9
Accounts payable and accrued expenses |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 0.0 | 0.0
Liabilities | (14.0) | (20.3)
Finite-Lived Liabilities, Net | (14.0) | (20.3)
Other noncurrent liabilities |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 0.0 | 0.0
Liabilities | (65.1) | (69.7)
Finite-Lived Liabilities, Net | (65.1) | (69.7)
Coal supply agreements |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities | (27.3) | (32.9)
Take-or-pay contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities | (51.8) | (57.1)
Finite-Lived Liabilities, Net | (51.8) | (57.1)
Coal supply agreements |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | 60.5 | 70.9
Finite-Lived Assets, Net | 33.2 | 38.0
Take-or-pay contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Assets | $ 0.0 | $ 0.0

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