Fair Value (Tables)

3 Months Ended

Sep. 30, 2011

Fair Value Disclosure Tables [Abstract]

			September 30, 2011				December 31, 2010
			Carrying		Fair		Carrying		Fair
			Amount		Value		Amount		Value

			(in millions)
Assets
	Marketable securities		$	1,093	$	1,093	$	1,767	$	1,767
	Derivatives			117		117		124		124
		Total assets	$	1,210	$	1,210	$	1,891	$	1,891
Liabilities
	Debt		$	20,878	$	21,101	$	19,550	$	20,137
	Derivatives			688		688		423		423
		Total liabilities	$	21,566	$	21,789	$	19,973	$	20,560

Fair Value Hierarchy For Recurring Measurements Table

			Quoted Market		Significant
			Prices in Active		Other		Significant
			Market for		Observable		Unobservable		Total
			Identical Assets		Inputs		Inputs		September 30,
			(Level 1)		(Level 2)		(Level 3)		2011

			(in millions)

Assets
	Available-for-sale securities		$	2	$	1,041	$	40	$	1,083
	Trading securities			10		-		-		10
	Derivatives			-		57		60		117
		Total assets	$	12	$	1,098	$	100	$	1,210

Liabilities
	Derivatives		$	-	$	419	$	269	$	688
		Total liabilities	$	-	$	419	$	269	$	688

			Quoted Market		Significant
			Prices in Active		Other		Significant
			Market for		Observable		Unobservable		Total
			Identical Assets		Inputs		Inputs		December 31,
			(Level 1)		(Level 2)		(Level 3)		2010

			(in millions)

Assets
	Available-for-sale securities		$	8	$	1,707	$	42	$	1,757
	Trading securities			10		-		-		10
	Derivatives			-		63		61		124
		Total assets	$	18	$	1,770	$	103	$	1,891

Liabilities
	Derivatives		$	-	$	411	$	12	$	423
		Total liabilities	$	-	$	411	$	12	$	423

Derivatives Level 3 Rollforward Table

				Three Months Ended September 30, 2011
				Interest		Cross		Foreign		Commodity
				Rate		Currency		Currency		and Other		Total

			(in millions)

Balance at July 1				$	(60)	$	15	$	38	$	17	$	10
	Total gains (losses) (realized and unrealized):
		Included in earnings⁽¹⁾			-		(3)		4		(44)		(43)
		Included in other comprehensive income			(36)		(37)		-		-		(73)
		Included in regulatory (assets) liabilities			-		-		-		(3)		(3)
	Settlements				4		4		(1)		(8)		(1)
	Transfers of assets (liabilities) into Level 3⁽²⁾				(101)		-		-		-		(101)
	Transfers of (assets) liabilities out of Level 3⁽²⁾				2		-		-		-		2
Balance at September 30				$	(191)	$	(21)	$	41	$	(38)	$	(209)

Total gains/(losses) for the period included in earnings
	attributable to the change in unrealized gains/(losses)
	relating to assets and liabilities held at the end of the
	period			$	-	$	(2)	$	2	$	(52)	$	(52)

				Three Months Ended September 30, 2010
				Interest		Cross		Foreign		Commodity
				Rate		Currency		Currency		and Other		Total

			(in millions)

Balance at July 1				$	(226)	$	(34)	$	18	$	19	$	(223)
	Total gains (losses) (realized and unrealized):
		Included in earnings⁽¹⁾			(2)		-		-		(3)		(5)
		Included in other comprehensive income			(63)		24		(1)		-		(40)
		Included in regulatory (assets) liabilities			(3)		-		-		(2)		(5)
	Settlements				15		1		-		(3)		13
	Transfers of assets (liabilities) into Level 3⁽²⁾				(3)		-		-		-		(3)
	Transfers of (assets) liabilities out of Level 3⁽²⁾				26		-		-		-		26
Balance at September 30				$	(256)	$	(9)	$	17	$	11	$	(237)

Total gains/(losses) for the period included in earnings
	attributable to the change in unrealized gains/(losses)
	relating to assets and liabilities held at the end of the
	period			$	(1)	$	-	$	-	$	-	$	(1)

				Nine Months Ended September 30, 2011
				Interest		Cross		Foreign		Commodity
				Rate		Currency		Currency		and Other		Total

			(in millions)

Balance at January 1				$	(1)	$	10	$	22	$	18	$	49
	Total gains (losses) (realized and unrealized):
		Included in earnings⁽¹⁾			-		(5)		21		(50)		(34)
		Included in other comprehensive income			(3)		(34)		-		-		(37)
		Included in regulatory (assets) liabilities			-		-		-		3		3
	Settlements				-		8		(2)		(9)		(3)
	Transfers of assets (liabilities) into Level 3⁽²⁾				(189)		-		-		-		(189)
	Transfers of (assets) liabilities out of Level 3⁽²⁾				2		-		-		-		2
Balance at September 30				$	(191)	$	(21)	$	41	$	(38)	$	(209)

Total gains/(losses) for the period included in earnings
	attributable to the change in unrealized gains/(losses)
	relating to assets and liabilities held at the end of the
	period			$	-	$	(2)	$	18	$	(56)	$	(40)

				Nine Months Ended September 30, 2010
				Interest		Cross		Foreign		Commodity
				Rate		Currency		Currency		and Other		Total

			(in millions)

Balance at January 1				$	(12)	$	(12)	$	-	$	24	$	-
	Total gains (losses) (realized and unrealized):
		Included in earnings⁽¹⁾			1		4		19		1		25
		Included in other comprehensive income			(20)		(5)		-		-		(25)
		Included in regulatory (assets) liabilities			(6)		-		-		2		(4)
	Settlements				6		4		(1)		(16)		(7)
	Transfers of assets (liabilities) into Level 3⁽²⁾				(251)		-		(1)		-		(252)
	Transfers of (assets) liabilities out of Level 3⁽²⁾				26		-		-		-		26
Balance at September 30				$	(256)	$	(9)	$	17	$	11	$	(237)

Total gains/(losses) for the period included in earnings
	attributable to the change in unrealized gains/(losses)
	relating to assets and liabilities held at the end of the
	period			$	(2)	$	5	$	20	$	(10)	$	13

			Three Months				Nine Months
			Ended September 30,				Ended September 30,
			2011		2010		2011		2010

		(in millions)

Balance at beginning of period⁽¹⁾			$	40	$	42	$	42	$	42
	Settlements			-		-		(2)		-
Balance at September 30			$	40	$	42	$	40	$	42

Total gains/(losses) for the period included in
	earnings attributable to the change in unrealized
	gains/losses relating to assets held at the
	end of the period		$	-	$	-	$	-	$	-

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]

				Nine Months Ended September 30, 2011
			Carrying	Fair Value						Gross
			Amount	Level 1		Level 2		Level 3		Loss

			(in millions)
Long-lived assets held and used:
	Wind turbines and deposits	$	161	$	-	$	45	$	-	$	116
	Kelanitissa		66		-		-		29		37
	Carbon Reduction Projects		49		-		-		11		33⁽¹⁾
	Bohemia		14		-		5		-		9
Equity method affiliates:
	YangCheng		100		-		-		26		74
Goodwill:
	Chigen		17		-		-		-		17

				Nine Months Ended September 30, 2010
			Carrying	Fair Value						Gross
			Amount	Level 1		Level 2		Level 3		Loss

			(in millions)
Long-lived assets held and used:
	Southland (Huntington Beach)	$	288	$	-	$	-	$	88	$	200
	Tisza II		160		-		-		75		85
Goodwill:
	Deepwater		18		-		-		-		18

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

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