Acquisitions and Dispositions (Tables)

12 Months Ended

Dec. 31, 2012

Acquisitions And Dispositions Tables [Abstract]

Schedule of Purchase Price Allocation [Table Text Block]

		Preliminary		Measurement Period Adjustments		Final
		(in millions)
Cash		$	116	$	-	$	116
Accounts receivable			278		-		278
Inventory			124		-		124
Other current assets			41		-		41
Property, plant and equipment			2,549		(71)(1)		2,478
Intangible assets subject to amortization			166		(19)(2)		147
Intangible assets - indefinite-lived			5		-		5
Regulatory assets			201		16(3)		217
Other noncurrent assets			58		-		58
Current liabilities			(401)		(5)		(406)
Non-recourse debt			(1,255)		-		(1,255)
Deferred income taxes			(558)		7(4)		(551)
Regulatory liabilities			(117)		-		(117)
Other noncurrent liabilities			(195)		(15)(5)		(210)
Redeemable preferred stock			(18)		-		(18)
	Net identifiable assets acquired		994		(87)		907
Goodwill			2,489		87(6)		2,576
	Net assets acquired	$	3,483	$	-		3,483