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Commitments And Contingencies (Narrative) (Details) $ in Millions | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Contract Termination |  |
Loss Contingencies |  |
Receivables | $ 42.7 | $ 42.3
Receivables, long-term | $ 7.8 |
Weighted Average Cost of Capital |  |
Loss Contingencies |  |
Weighted average cost of capital | 0.130 |

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