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OPERATING REVENUES - OTHER OPERATING REVENUES (Details) - 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 | $ 51.3 | $ 11.9 | $ 114.6 | $ 58.2
Alternative revenues |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | 10.1 | (18.3) | 37.0 | 0.0
Late payment charges |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | 15.3 | 13.9 | 31.2 | 27.7
Amortization of revenue intangibles |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | 14.6 | 14.4 | 29.3 | 28.0
Bepoke resources current return |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | 10.8 | 0.0 | 15.1 | 0.0
Other |  |  |  |
Disaggregation of Operating Revenues |  |  |  |
Other operating revenues | $ 0.5 | $ 1.9 | $ 2.0 | $ 2.5

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