DERIVATIVE INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2022

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.

	December 31, 2022				December 31, 2021
(in millions)	Derivative Assets		Derivative Liabilities		Derivative Assets		Derivative Liabilities
Current
Natural gas contracts	$	1.7	$	16.3	$	9.2	$	1.5
FTRs	4.1		—		1.4		—
Coal contracts	1.4		—		11.6		—
Total current	7.2		16.3		22.2		1.5
Long-term
Natural gas contracts	—		0.6		0.3		0.1
Coal contracts	0.4		—		3.7		—
Total long-term	0.4		0.6		4.0		0.1
Total	$	7.6	$	16.9	$	26.2	$	1.6

Schedule of estimated notional sales volumes and realized gains (losses)

Our estimated notional sales volumes and realized gains and losses were as follows for the years ended:

	December 31, 2022			December 31, 2021			December 31, 2020
(in millions)	Volumes	Gains		Volumes	Gains		Volumes	Gains (Losses)
Natural gas contracts	33.4 Dth	$	43.1	37.5 Dth	$	21.8	38.1 Dth	$	(8.7)
FTRs	7.8 MWh	2.5		7.0 MWh	8.7		8.3 MWh	1.4
Total		$	45.6		$	30.5		$	(7.3)

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:

	December 31, 2022					December 31, 2021
(in millions)	Derivative Assets		Derivative Liabilities			Derivative Assets		Derivative Liabilities
Gross amount recognized on the balance sheet	$	7.6	$	16.9		$	26.2	$	1.6
Gross amount not offset on the balance sheet	(1.4)		(14.8)		(1)	(1.4)		(1.4)
Net amount	$	6.2	$	2.1		$	24.8	$	0.2

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