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OPERATING REVENUES - OTHER OPERATING REVENUES (Details) - Other operating revenues - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | $ 9.2 | $ 13.4 | $ 113.5 | $ 63.3
Late payment charges |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | 10.4 | 12.4 | 39.1 | 45.8
Alternative revenues |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | (1.7) | 0.0 | 71.1 | 13.9
Other |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | $ 0.5 | $ 1.0 | $ 3.3 | $ 3.6

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