Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Benefit Plans (Tables) [Abstract]

Components of Net Periodic Benefit Cost

					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2012		2011		2012		2011
	(in millions)
Service Cost	$	19	$	18	$	12	$	11
Interest Cost		56		59		26		27
Expected Return on Plan Assets		(80)		(79)		(25)		(27)
Amortization of Prior Service Credit		-		-		(5)		-
Amortization of Net Actuarial Loss		37		30		14		7
Net Periodic Benefit Cost	$	32	$	28	$	22	$	18