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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