Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2013

Derivative Instruments (Tables) [Abstract]

We record our current derivative assets on the balance sheet in other current assets and the current portion of the liabilities in other current liabilities. The long-term portion of our derivative assets of $0.4 million is recorded in other deferred charges and other assets, and we had no long-term portion of derivative liabilities. Our Consolidated Balance Sheets as of December 31, 2013 and 2012 include:



	December 31, 2013				December 31, 2012
	Derivative Asset		Derivative Liability		Derivative Asset		Derivative Liability
	(Millions of Dollars)
Natural Gas	$	5.6	$	0.1	$	3.0	$	1.9
Fuel Oil	0.6		—		0.4		—
FTRs	3.5		—		4.7		—
Coal	2.1		0.2		11.1		—
Total	$	11.8	$	0.3	$	19.2	$	1.9

Derivative instruments' estimated notional volumes and gain (losses)

Our Consolidated Income Statements include gains (losses) on derivative instruments used in our risk management strategies under fuel and purchased power for those commodities supporting our electric operations and under cost of gas sold for the natural gas sold to our customers. Our estimated notional volumes and gains (losses) for the years ended December 31 were as follows:



	2013				2012
	Volume	Gains (Losses)			Volume	Gains (Losses)
		(Millions of Dollars)				(Millions of Dollars)

Natural Gas	48.6 million Dth	$	(8.5	)	77.2 million Dth	$	(36.3	)
Fuel Oil	8.6 million gallons	0.5			7.0 million gallons	1.8
FTRs	25.3 million MWh	14.9			25.1 million MWh	6.1
Total		$	6.9			$	(28.4	)

Offsetting Assets and Liabilities [Table Text Block]



	2013				2012
	Derivative		Derivative		Derivative			Derivative
	Asset		Liability		Asset			Liability
	(Millions of Dollars)

Gross Amount Recognized on the Balance Sheet	$	11.8	$	0.3	$	19.2		$	1.9
Gross Amount Not Offset on Balance Sheet (a)	—		—		(0.5		)	(1.8		)
Net Amount	$	11.8	$	0.3	$	18.7		$	0.1


(a)	Gross Amount Not Offset on Balance Sheet includes cash collateral posted of zero and $1.3 million as of December 31, 2013 and 2012, respectively.