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Benefit Plans, Fair Values by Asset Category (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Fair Value of Plan Assets [Abstract]    
Fair value of plan assets $ 341.3 $ 317.4
Equity Securities [Member]    
Fair Value of Plan Assets [Abstract]    
Fair value of plan assets 188.7 162.9
Fixed Income Securities [Member]    
Fair Value of Plan Assets [Abstract]    
Fair value of plan assets 112.8 112.0
Real Estate [Member]    
Fair Value of Plan Assets [Abstract]    
Fair value of plan assets 0.3 0.8
Other [Member]    
Fair Value of Plan Assets [Abstract]    
Fair value of plan assets $ 39.5 $ 41.7