OPERATING REVENUES - OTHER OPERATING REVENUES (Details) - Other operating revenues - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Operating Revenues
Other operating revenues	$ 75.7	$ 29.9
Alternative revenues
Disaggregation of Operating Revenues
Other operating revenues	60.5	11.8
Late payment charges
Disaggregation of Operating Revenues
Other operating revenues	14.6	17.2
Other
Disaggregation of Operating Revenues
Other operating revenues	$ 0.6	$ 0.9