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DERIVATIVE INSTRUMENTS (Tables)
 3 Months Ended
Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of derivative assets and liabilities The following table shows our derivative assets and derivative liabilities. None of the derivatives shown below are designated as hedging instruments.
 March 31, 2023December 31, 2022
(in millions)Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
Current
Natural gas contracts$1.2 $26.7 $1.7 $16.3 
FTRs1.7 — 4.1 — 
Coal contracts1.2 0.1 1.4 — 
Total current 4.1 26.8 7.2 16.3 
Long-term
Natural gas contracts— 0.3 — 0.6 
Coal contracts0.3 0.4 0.4 — 
Total long-term0.3 0.7 0.4 0.6 
Total$4.4 $27.5 $7.6 $16.9 
Schedule of estimated notional volumes and realized gains and losses Our estimated notional sales volumes and realized gains and losses were as follows:
Three Months Ended March 31, 2023Three Months Ended March 31, 2022
(in millions)VolumesGains (Losses)VolumesGains
Natural gas contracts
11.7 Dth
$(14.8)
11.6 Dth
$5.2 
FTRs
2.1 MWh
0.8 
2.0 MWh
0.8 
Total$(14.0)$6.0 
Schedule of net derivative instruments
The following table shows derivative assets and derivative liabilities if derivative instruments by counterparty were presented net on our balance sheets:
March 31, 2023December 31, 2022
(in millions)Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
Gross amount recognized on the balance sheet$4.4 $27.5 $7.6 $16.9 
Gross amount not offset on the balance sheet(0.2)(26.9)
(1)
(1.4)(14.8)
(2)
Net amount$4.2 $0.6 $6.2 $2.1 

(1)    Includes cash collateral posted of $26.7 million.
(2)    Includes cash collateral posted of $13.4 million.