Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Derivative Instruments (Tables) [Abstract]



	June 30, 2012				December 31, 2011
	Derivative Asset		Derivative Liability		Derivative Asset		Derivative Liability
	(Millions of Dollars)

Natural Gas	$	5.0	$	0.1	$	2.1	$	9.1
Fuel Oil	—		0.5		0.3		0.1
FTRs	9.9		—		5.7		—
Coal	9.8		7.4		12.5		—
Total	$	24.7	$	8.0	$	20.6	$	9.2

Derivative instruments' estimated notional volumes and gain (losses)



	Three Months Ended June 30, 2012				Three Months Ended June 30, 2011
	Volume	Gains (Losses)			Volume	Gains (Losses)
		(Millions of Dollars)				(Millions of Dollars)

Natural Gas	18.5 million Dth	$	(14.2	)	18.9 million Dth	$	(6.6	)
Fuel Oil	2.1 million gallons	0.8			3.4 million gallons	2.1
FTRs	5,296 MW	1.6			6,191 MW	1.5
Total		$	(11.8	)		$	(3.0	)



	Six Months Ended June 30, 2012				Six Months Ended June 30, 2011
	Volume	Gains (Losses)			Volume	Gains (Losses)
		(Millions of Dollars)				(Millions of Dollars)

Natural Gas	38.9 million Dth	$	(30.4	)	38.3 million Dth	$	(17.2	)
Fuel Oil	3.8 million gallons	1.4			6.6 million gallons	2.5
FTRs	10,654 MW	2.2			12,543 MW	5.3
Total		$	(26.8	)		$	(9.4	)

- 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