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DERIVATIVE INSTRUMENTS - DERIVATIVE ASSETS AND LIABILITIES (Details) $ in Millions | Sep. 30, 2022 USD ($) Instruments | Dec. 31, 2021 USD ($) Instruments
--- | --- | ---
Derivative assets |  |
Current derivative assets | $ 191.0 | $ 107.0
Long-term derivative assets | 28.2 | 13.0
Total derivative assets | 219.2 | 120.0
Derivative liabilities |  |
Current derivative liabilities | 46.7 | 14.0
Long-term derivative liabilities | 2.9 | 1.1
Total derivative liabilities | 49.6 | 15.1
Natural gas contracts |  |
Derivative assets |  |
Current derivative assets | 135.0 | 60.6
Long-term derivative assets | 6.4 | 4.0
Derivative liabilities |  |
Current derivative liabilities | 46.7 | 14.0
Long-term derivative liabilities | 2.9 | 1.1
FTRs and TCRs |  |
Derivative assets |  |
Current derivative assets | 12.0 | 2.4
Derivative liabilities |  |
Current derivative liabilities | 0.0 | 0.0
Coal contracts |  |
Derivative assets |  |
Current derivative assets | 44.0 | 44.0
Long-term derivative assets | 21.8 | 9.0
Derivative liabilities |  |
Current derivative liabilities | 0.0 | 0.0
Long-term derivative liabilities | $ 0.0 | $ 0.0
Designated as hedging instrument |  |
Derivative instruments |  |
Number of derivative instruments | Instruments | 0 | 0

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