v3.25.4

FAIR VALUE MEASUREMENTS (Measured on Recurring Basis) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Obligation to receive cash collateral posted against derivative obligations | $ 5.7 | $ 15.1
ASSETS |  |
Commodity contracts, effect of counter-party netting | (5.7) | (15.1)
Fair Value, Measurements, Recurring | Commodity Contract |  |
Liabilities |  |
Commodity contracts | 9.7 | 14.0
Commodity contracts, effect of counter-party netting | (9.7) | (14.0)
Commodity contracts, net carrying value on Balance Sheet | 0.0 | 0.0
Fair Value, Measurements, Recurring | Renewable Energy Credit and Emissions Obligation |  |
Liabilities |  |
Commodity contracts, effect of counter-party netting | 0.0 | 0.0
Renewable energy credit and emissions obligations | 574.8 | 465.9
Level 1 | Fair Value, Measurements, Recurring | Commodity Contract |  |
Liabilities |  |
Commodity contracts | 9.6 | 14.0
Level 1 | Fair Value, Measurements, Recurring | Renewable Energy Credit and Emissions Obligation |  |
Liabilities |  |
Renewable energy credit and emissions obligations | 0.0 | 0.0
Level 2 | Fair Value, Measurements, Recurring | Commodity Contract |  |
Liabilities |  |
Commodity contracts | 0.1 | 0.0
Level 2 | Fair Value, Measurements, Recurring | Renewable Energy Credit and Emissions Obligation |  |
Liabilities |  |
Renewable energy credit and emissions obligations | 574.8 | 465.9
Level 3 | Fair Value, Measurements, Recurring | Commodity Contract |  |
Liabilities |  |
Commodity contracts | 0.0 | 0.0
Level 3 | Fair Value, Measurements, Recurring | Renewable Energy Credit and Emissions Obligation |  |
Liabilities |  |
Renewable energy credit and emissions obligations | 0.0 | 0.0
Money market funds | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Money market funds | 14.2 | 21.0
Money market funds | Level 1 | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Money market funds | 14.2 | 21.0
Money market funds | Level 2 | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Money market funds | 0.0 | 0.0
Money market funds | Level 3 | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Money market funds | 0.0 | 0.0
Commodity Contract | Fair Value, Measurements, Recurring |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Obligation to receive cash collateral posted against derivative obligations | 9.7 | 14.0
ASSETS |  |
Commodity contracts | 20.1 | 16.0
Commodity contracts, effect of counter-party netting | (9.7) | (14.0)
Commodity contracts, net carrying value on Balance Sheet | 10.4 | 2.0
Commodity Contract | Level 1 | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Commodity contracts | 8.2 | 16.0
Commodity Contract | Level 2 | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Commodity contracts | 11.9 | 0.0
Commodity Contract | Level 3 | Fair Value, Measurements, Recurring |  |
ASSETS |  |
Commodity contracts | $ 0.0 | $ 0.0

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