Derivatives And Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2012

Derivatives And Hedging Activities [Abstract]

Volumes Of Outstanding Derivative Contracts

2012		Contract Volume (1)
			1 Year or	3 Years or
			Greater but	Greater but
		Less Than 1	Less Than 3	Less Than 5	5 Years or
Underlying Product	Instruments	Year	Years	Years	Greater (2)
Natural Gas (3)	Forwards and
(MMBtus (4))	Swaps	329,466,510	98,628,398	5,490,000	-
	Options	221,587,431	216,279,767	10,050,000	-
Electricity	Forwards and
(Megawatt-hours)	Swaps	2,537,023	3,541,046	2,009,505	2,538,718
	Options	-	239,015	239,233	119,508
	Congestion
	Revenue Rights	74,198,690	74,187,803	74,240,147	25,699,804

⁽¹⁾ Amounts shown reflect the total gross derivative volumes by commodity type that are expected to settle in each period.

⁽²⁾ Derivatives in this category expire between 2018 and 2023.

⁽³⁾ Amounts shown are for the combined positions of the electric fuels and core gas portfolios.

⁽⁴⁾ Million British Thermal Units.

2011		Contract Volume (1)
			1 Year or	3 Years or
			Greater but	Greater but
		Less Than 1	Less Than 3	Less Than 5	5 Years or
Underlying Product	Instruments	Year	Years	Years	Greater (2)
Natural Gas (3)	Forwards and
(MMBtus (4))	Swaps	500,375,394	212,088,902	6,080,000	-
	Options	257,766,990	336,543,013	-	-
Electricity	Forwards and
(Megawatt-hours)	Swaps	4,718,568	5,206,512	2,142,024	3,754,872
	Options	1,248,000	132,048	264,348	264,096
	Congestion
	Revenue Rights	84,247,502	72,882,246	72,949,250	61,673,535

⁽¹⁾ Amounts shown reflect the total gross derivative volumes by commodity type that are expected to settle in each period.

⁽²⁾ Derivatives in this category expire between 2017 and 2022.

⁽³⁾ Amounts shown are for the combined positions of the electric fuels and core gas portfolios.

⁽⁴⁾ Million British Thermal Units.

Outstanding Derivative Balances

2012	Commodity Risk
	Gross Derivative						Total Derivative
(in millions)	Balance		Netting		Cash Collateral		Balance
Current assets - other	$	48	$	(25)	$	36	$	59
Other noncurrent assets - other		99		(11)		-		88
Current liabilities - other		(255)		25		115		(115)
Noncurrent liabilities - other		(221)		11		14		(196)
Total commodity risk	$	(329)	$	-	$	165	$	(164)

2011	Commodity Risk
	Gross Derivative						Total Derivative
(in millions)	Balance		Netting		Cash Collateral		Balance
Current assets - other	$	54	$	(39)	$	103	$	118
Other noncurrent assets - other		113		(59)		-		54
Current liabilities - other		(489)		39		274		(176)
Noncurrent liabilities - other		(398)		59		101		(238)
Total commodity risk	$	(720)	$	-	$	478	$	(242)

Gains And Losses On Derivative Instruments

	Commodity Risk
	For the year ended December 31,
(in millions)	2012		2011		2010
Unrealized gain/(loss) - regulatory assets and liabilities (1)	$	391	$	21	$	(260)
Realized loss - cost of electricity (2)		(486)		(558)		(573)
Realized loss - cost of natural gas (2)		(38)		(106)		(79)
Total commodity risk	$	(133)	$	(643)	$	(912)

⁽¹⁾ Unrealized gains and losses on commodity risk-related derivative instruments are recorded to regulatory assets or liabilities, rather than being recorded to the  Consolidated Statements of Income.  These amounts exclude the impact of cash collateral postings.

⁽²⁾ These amounts are fully passed through to customers in rates.  Accordingly, net income was not impacted by realized amounts on these instruments.

Additional Cash Collateral The Utility Would Be Required To Post If Its Credit Risk-Related Contingency Features Were Triggered

	Balance at December 31,
(in millions)	2012		2011
Derivatives in a liability position with credit risk-related
contingencies that are not fully collateralized	$	(266)	$	(611)
Related derivatives in an asset position		59		86
Collateral posting in the normal course of business related to
these derivatives		103		250
Net position of derivative contracts/additional collateral
posting requirements (1)	$	(104)	$	(275)

 ⁽¹⁾ This calculation excludes the impact of closed but unpaid positions, as their settlement is not impacted by any of the Utility's credit risk-related contingencies.