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Retirement Benefits - Schedule of Basis Used to Measure Defined Benefit Plans Assets at Fair Value (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | $ 49.3 | $ 46.0
Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 3.3 | 1.8
Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 16.0 | 18.4
Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 30.0 | 25.8
U.S. Large Cap |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.2 | 0.2
U.S. Large Cap | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.2 | 0.2
U.S. Large Cap | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Large Cap | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Small / Mid Cap |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 2.1
U.S. Small / Mid Cap | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Small / Mid Cap | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 2.1
U.S. Small / Mid Cap | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
International |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.8 | 2.4
International | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.8 | 0.8
International | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 1.6
International | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Intermediate |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 2.5 | 2.5
U.S. Intermediate | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Intermediate | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 2.5 | 2.5
U.S. Intermediate | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Long Term |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 3.1 | 3.3
U.S. Long Term | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. Long Term | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 3.1 | 3.3
U.S. Long Term | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. High Yield |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.7 | 0.5
U.S. High Yield | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
U.S. High Yield | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.7 | 0.5
U.S. High Yield | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
International |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 8.2 | 6.4
International | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.2 | 0.2
International | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 8.0 | 6.2
International | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
Other Commingled Funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 30.0 | 25.8
Other Commingled Funds | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
Other Commingled Funds | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
Other Commingled Funds | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 30.0 | 25.8
Cash and Equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 2.1 | 1.1
Cash and Equivalents | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 2.1 | 0.6
Cash and Equivalents | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.5
Cash and Equivalents | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 1.7 | 1.7
Other | Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 0.0 | 0.0
Other | Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | 1.7 | 1.7
Other | Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, fair value of plan assets | $ 0.0 | $ 0.0

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