DERIVATIVE INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative assets and derivative liabilities

The following table shows our derivative assets and derivative liabilities:

	March 31, 2018				December 31, 2017
(in millions)	Derivative Assets		Derivative Liabilities		Derivative Assets		Derivative Liabilities
Other current
Natural gas contracts	$	0.4	$	0.3	$	0.6	$	1.9
Petroleum products contracts	0.5		—		0.9		—
FTRs	0.8		—		2.4		—
Coal contracts	0.7		—		0.6		0.1
Total other current *	$	2.4	$	0.3	$	4.5	$	2.0
Other long-term
Natural gas contracts	$	—	$	0.3	$	—	$	0.2
Coal contracts	—		—		0.1		0.2
Total other long-term *	—		0.3		0.1		0.4
Total	$	2.4	$	0.6	$	4.6	$	2.4

* On our balance sheets, we classify derivative assets and liabilities as other current or other long-term based on the maturities of the underlying contracts.

Estimated notional volumes and realized gains(losses)

Our estimated notional sales volumes and realized gains (losses) were as follows:

	Three Months Ended March 31, 2018				Three Months Ended March 31, 2017
(in millions)	Volumes	Gains (Losses)			Volumes	Gains (Losses)
Natural gas contracts	11.7 Dth	$	(1.8	)	8.2 Dth	$	0.5
Petroleum products contracts	1.4 gallons	0.4			4.9 gallons	(0.5		)
FTRs	5.8 MWh	0.8			7.0 MWh	2.5
Total		$	(0.6	)		$	2.5

Offsetting Assets and Liabilities

The following table shows derivative assets and derivative liabilities if derivative instruments by counterparty were presented net on our balance sheets:

	March 31, 2018								December 31, 2017
(in millions)	Derivative Assets			Derivative Liabilities					Derivative Assets			Derivative Liabilities
Gross amount recognized on the balance sheet	$	2.4		$	0.6				$	4.6		$	2.4
Gross amount not offset on the balance sheet	(0.4		)	(0.5		)	(1	)	(1.3		)	(2.0		)	(2	)
Net amount	$	2.0		$	0.1				$	3.3		$	0.4

⁽¹⁾ Includes cash collateral posted of $0.1 million.

⁽²⁾ Includes cash collateral posted of $0.7 million.