v3.26.1
Acquisitions and Divestitures (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Acquisitions - Additional Information [Line Items]    
Revenues $ 353.1 $ 298.7
Operating Income (Loss) $ 99.4 $ 86.8
Number of Miles of Distribution Mains 150 160
Transaction-related expenses $ 0.0 $ 0.3
Total operating income 99.4 86.8
Unregulated Energy [Member]    
Acquisitions - Additional Information [Line Items]    
Revenues 113.7 106.7
Operating Income (Loss) 28.3 26.3
Total operating income 28.3 26.3
Regulated Energy [Member]    
Acquisitions - Additional Information [Line Items]    
Revenues 249.3 199.6
Operating Income (Loss) 71.1 60.5
Total operating income $ 71.1 $ 60.5