v3.26.1
OPERATING REVENUES OTHER OPERATING REVENUES (Details) - Utility segment - Other operating revenues - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Operating Revenues        
Other operating revenues $ 1.0 $ 0.9 $ 2.2 $ 2.1
Late payment charges        
Disaggregation of Operating Revenues        
Other operating revenues 1.0 1.0 2.1 1.9
Rental revenues        
Disaggregation of Operating Revenues        
Other operating revenues 0.1 0.1 0.2 0.2
Alternative revenues        
Disaggregation of Operating Revenues        
Other operating revenues $ (0.1) $ (0.2) $ (0.1) $ 0.0