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Intangible Contract Assets and Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue Recognition [Abstract] |
Schedule Of Intangible Assets And Liabilities | The balances, net of accumulated amortization, and respective balance sheet classifications at September 30, 2019 and December 31, 2018, are set forth in the following tables:
| September 30, 2019
| Assets |  | Liabilities |  | Net Total
| (Dollars in millions)
Coal supply agreements | $ | 44.5 |  |  | $ | (23.4 | ) |  | $ | 21.1 |
Take-or-pay contracts | — |  |  | (41.2 | ) |  | (41.2 | )
Total | $ | 44.5 |  |  | $ | (64.6 | ) |  | $ | (20.1 | )
Balance sheet classification: |  |  |  |  |
Investments and other assets | $ | 44.5 |  |  | $ | — |  |  | $ | 44.5 |
Accounts payable and accrued expenses | — |  |  | (9.5 | ) |  | (9.5 | )
Other noncurrent liabilities | — |  |  | (55.1 | ) |  | (55.1 | )
Total | $ | 44.5 |  |  | $ | (64.6 | ) |  | $ | (20.1 | )
| December 31, 2018
| Assets |  | Liabilities |  | Net Total
| (Dollars in millions)
Coal supply agreements | $ | 70.9 |  |  | $ | (32.9 | ) |  | $ | 38.0 |
Take-or-pay contracts | — |  |  | (57.1 | ) |  | (57.1 | )
Total | $ | 70.9 |  |  | $ | (90.0 | ) |  | $ | (19.1 | )
Balance sheet classification: |  |  |  |  |
Investments and other assets | $ | 70.9 |  |  | $ | — |  |  | $ | 70.9 |
Accounts payable and accrued expenses | — |  |  | (20.3 | ) |  | (20.3 | )
Other noncurrent liabilities | — |  |  | (69.7 | ) |  | (69.7 | )
Total | $ | 70.9 |  |  | $ | (90.0 | ) |  | $ | (19.1 | )

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