Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2011

Significant Accounting Policies [Abstract]

Components Of Net Periodic Benefit Cost

	Pension Benefits				Other Benefits
	Three Months Ended             September 30,				Three Months Ended     September 30,
(in millions)	2011		2010		2011		2010
Service cost for benefits earned		$76		$  70		$  9		$  8
Interest cost		167		162		23		21
Expected return on plan assets		(168)		(155)		(22)		(18)
Amortization of transition obligation		-		-		7		6
Amortization of prior service cost		8		13		8		7
Amortization of unrecognized loss		13		11		1		1
Net periodic benefit cost		96		101		26		25
Less: transfer to regulatory account (1)		(32)		(60)		-		-
Total		$  64		$  41		$  26		$  25
(1) The Utility recorded $32 million and $60 million for the three month periods ended September 30, 2011 and 2010, respectively, to a regulatory account as the amounts are probable of recovery from customers in future rates.

	Pension Benefits				Other Benefits
	Nine Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2011		2010		2011		2010
Service cost for benefits earned		$  240		$  209		$  31		$  27
Interest cost		495		484		69		66
Expected return on plan assets		(502)		(467)		(62)		(55)
Amortization of transition obligation		-		-		19		19
Amortization of prior service cost		26		39		20		19
Amortization of unrecognized loss		37		32		3		2
Net periodic benefit cost		296		297		80		78
Less: transfer to regulatory account (1)		(104)		(175)		-		-
Total		$  192		$  122		$  80		$  78
(1) The Utility recorded $104 million and $175 million for the nine month periods ended September 30, 2011 and 2010, respectively, to a regulatory account as the amounts are probable of recovery from customers in future rates.