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Employee Benefit Plans (Fair Value of Plan Assets) (Details) - Pension Plans [Member] - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Defined Benefit Plan, Plan Assets, Amount | $ 331.7 | $ 402.3 | $ 388.2 | $ 356.9
Defined Benefit Plan, Cash [Member] |  |  |  |
Actual allocation of plan assets, Fixed income | 5.00% | 4.90% |  |
Fixed Income Funds [Member] |  |  |  |
Actual allocation of plan assets, Fixed income | 39.70% | 39.30% |  |
US Equity [Member] |  |  |  |
Actual allocation of plan assets, Fixed income | 39.10% | 35.50% |  |
Foreign equity [Member] |  |  |  |
Actual allocation of plan assets, Fixed income | 16.20% | 20.30% |  |
Fair Value, Inputs, level 2 [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 331.7 | $ 402.3 |  |
Fair Value, Inputs, level 2 [Member] | Defined Benefit Plan, Cash [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount | 16.6 | 19.8 |  |
Fair Value, Inputs, level 2 [Member] | Fixed Income Funds [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount | 131.6 | 158.2 |  |
Fair Value, Inputs, level 2 [Member] | US Equity [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount | 129.8 | 142.8 |  |
Fair Value, Inputs, level 2 [Member] | Foreign equity [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 53.7 | $ 81.5 |  |

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