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Pension And Other Post-Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position | $ (106.7) | $ (111.3)
Other Post-Retirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Contribution to pension plans for continuing operations | 0.5 |
Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Expected required contributions | 11.7 |
Accrued Expenses [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Liability, Defined Benefit Plan, Current | $ 0.7 |

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