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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments (Tables) [Abstract]



	March 31, 2013				December 31, 2012
	Derivative Asset		Derivative Liability		Derivative Asset		Derivative Liability
	(Millions of Dollars)

Natural Gas	$	6.7	$	—	$	3.0	$	1.9
Fuel Oil	0.5		—		0.4		—
FTRs	1.5		—		4.7		—
Coal	3.2		0.3		11.1		—
Total	$	11.9	$	0.3	$	19.2	$	1.9

Derivative instruments' estimated notional volumes and gain (losses)



	Three Months Ended March 31, 2013				Three Months Ended March 31, 2012
	Volume	Gains (Losses)			Volume	Gains (Losses)
		(Millions of Dollars)				(Millions of Dollars)

Natural Gas	18.8 million Dth	$	(6.5	)	20.4 million Dth	$	(16.2	)
Fuel Oil	1.6 million gallons	0.1			1.7 million gallons	0.6
FTRs	5,343 MW	0.9			5,358 MW	0.6
Total		$	(5.5	)		$	(15.0	)

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References+ Details

- Definition

Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.

+ References+ Details