DERIVATIVE INSTRUMENTS - GAINS (LOSSES) AND NOTIONAL VOLUMES (Details) MWh in Millions, MMBTU in Millions, $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2024
USD ($)
MMBTU
MWh
|
Jun. 30, 2023
USD ($)
MMBTU
MWh
|
Jun. 30, 2024
USD ($)
MMBTU
MWh
|
Jun. 30, 2023
USD ($)
MWh
MMBTU
|
|
| Realized gains and losses | ||||
| Gains (losses) | $ (27.8) | $ (65.0) | $ (83.1) | $ (139.9) |
| Natural gas contracts | ||||
| Realized gains and losses | ||||
| Gains (losses) | $ (29.8) | $ (69.1) | $ (86.7) | $ (144.4) |
| Notional sales volumes | ||||
| Notional sales volumes | MMBTU | 48.1 | 47.7 | 115.9 | 106.4 |
| FTRs and TCRs | ||||
| Realized gains and losses | ||||
| Gains (losses) | $ 2.0 | $ 4.1 | $ 3.6 | $ 4.5 |
| Notional sales volumes | ||||
| Notional sales volumes | MWh | 7.6 | 7.5 | 15.2 | 14.8 |
| Non-Utility Energy Infrastructure | ||||
| Realized gains and losses | ||||
| Realized gains and losses on derivatives income statement location | Total operating revenues | Total operating revenues | Total operating revenues | Total operating revenues |
| Utility operations | ||||
| Realized gains and losses | ||||
| Realized gains and losses on derivatives income statement location | Cost of sales | Cost of sales | Cost of sales | Cost of sales |