v3.26.3
OPERATING REVENUES - OTHER OPERATING REVENUES (Details) - Other operating revenues - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Operating Revenues        
Other operating revenues $ 62.3 $ 15.7 $ 176.9 $ 73.9
Bepoke resources current return        
Disaggregation of Operating Revenues        
Other operating revenues 38.3 0.0 53.4 0.0
Amortization of revenue intangibles        
Disaggregation of Operating Revenues        
Other operating revenues 14.7 14.3 44.0 42.3
Late payment charges        
Disaggregation of Operating Revenues        
Other operating revenues 12.3 10.4 43.5 38.1
Alternative revenues        
Disaggregation of Operating Revenues        
Other operating revenues (3.5) (9.6) 33.5 (9.6)
Other        
Disaggregation of Operating Revenues        
Other operating revenues $ 0.5 $ 0.6 $ 2.5 $ 3.1