Organization and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2012

Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]

Schedule of Variable Interest Entities [Table Text Block]

	December 31, 2012								December 31, 2011
	Securitization		Other		Total		Restricted Amounts		Securitization		Other		Total		Restricted Amounts
	(In millions)
ASSETS
Cash and cash equivalents	$	—	$	10	$	10	$	8	$	—	$	25	$	25	$	—
Restricted cash	102		7		109		109		107		7		114		114
Accounts receivable	34		7		41		38		34		17		51		36
Inventories	—		141		141		3		—		183		183		—
Other current assets	—		1		1		1		—		1		1		—
Property, plant and equipment	—		93		93		49		—		73		73		23
Securitized regulatory assets	413		—		413		413		577		—		577		577
Other assets	7		11		18		18		10		6		16		16
	$	556	$	270	$	826	$	639	$	728	$	312	$	1,040	$	766
LIABILITIES
Accounts payable and accrued current liabilities	$	11	$	14	$	25	$	12	$	14	$	24	$	38	$	14
Current portion long-term debt, including capital leases	177		8		185		185		164		7		171		171
Other current liabilities	50		4		54		53		55		—		55		55
Mortgage bonds, notes and other	—		25		25		25		—		30		30		30
Securitization bonds	302		—		302		302		479		—		479		479
Capital lease obligations	—		11		11		11		—		14		14		14
Other long-term liabilities	7		2		9		8		7		2		9		8
	$	547	$	64	$	611	$	596	$	719	$	77	$	796	$	771

Summary of amounts for non-consolidated VIEs [Table Text Block

	December 31, 2012		December 31, 2011
	(In millions)
Other investments	$	130	$	117
Notes receivable	6		7