DERIVATIVE INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative assets and derivative liabilities

The following table shows our derivative assets and derivative liabilities:

	March 31, 2017				December 31, 2016
(in millions)	Derivative Assets		Derivative Liabilities		Derivative Assets		Derivative Liabilities
Other current
Natural gas contracts	$	11.4	$	0.7	$	31.4	$	0.4
Petroleum products contracts	—		0.3		0.2		0.1
FTRs	1.7		—		5.1		—
Coal contracts	1.0		1.8		1.5		1.4
Total other current *	$	14.1	$	2.8	$	38.2	$	1.9
Other long-term
Natural gas contracts	$	0.4	$	0.2	$	2.9	$	—
Coal contracts	—		1.2		0.5		0.5
Total other long-term *	$	0.4	$	1.4	$	3.4	$	0.5
Total	$	14.5	$	4.2	$	41.6	$	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 gain (losses)

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

	Three Months Ended March 31, 2017				Three Months Ended March 31, 2016
(in millions)	Volumes	Gains (Losses)			Volumes	Gains (Losses)
Natural gas contracts	34.1 Dth	$	(0.3	)	50.1 Dth	$	(33.5	)
Petroleum products contracts	4.9 gallons	(0.5		)	3.0 gallons	(1.1		)
FTRs	9.2 MWh	3.0			7.6 MWh	3.0
Total		$	2.2			$	(31.6	)

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, 2017						December 31, 2016
(in millions)	Derivative Assets			Derivative Liabilities			Derivative Assets				Derivative Liabilities
Gross amount recognized on the balance sheet	$	14.5		$	4.2		$	41.6			$	2.4
Gross amount not offset on the balance sheet	(1.2		)	(1.2		)	(4.9		)	*	(0.5		)
Net amount	$	13.3		$	3.0		$	36.7			$	1.9

* Includes cash collateral received of $4.4 million.