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Employee Benefit Plans (Components of Net Pension (Expense) Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Retirement Benefits [Abstract] |  |  |
Service cost | $ 5.3 | $ 5.1 | $ 5.1
Interest cost | 6.6 | 6.0 | 7.2
Expected return on plan assets | (13.2) | (12.5) | (11.9)
Recognized net actuarial loss | 2.5 | 5.3 | 4.0
Prior service cost | 0.0 | 0.0 | (0.4)
Curtailments and settlements | 0.0 | (0.2) | 0.0
Net pension expense | $ 1.2 | $ 3.7 | $ 4.0
Weighted average assumptions for pension costs: |  |  |
Discount rate used in net pension costs | 2.50% | 2.10% | 2.80%
Rate of compensation increase used in pension costs | 3.50% | 3.50% | 3.40%
Expected return on plan assets | 6.00% | 5.90% | 6.10%
Weighted average assumptions for benefit obligation: |  |  |
Discount rate used in benefit obligation | 5.00% | 2.50% | 2.10%
Rate of compensation increase used in benefit obligation | 3.40% | 3.50% | 3.50%
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Income (Expense), Net |  |

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