Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule Of Components Of Net Periodic Pension Cost

Net periodic pension cost consisted of the following:

	For the Three Months Ended March 31,
	2013			2012
	(in millions)
Service cost	$	21		$	20
Interest cost	78			86
Expected return on plan assets	(123		)	(111		)
Amortization:
Net loss	69			56
Prior service cost	3			3
Net periodic pension cost	$	48		$	54

Postretirement Health Care Costs

Net postretirement health care costs consisted of the following:

	For the Three Months Ended March 31,
	2013			2012
	(in millions)
Service cost	$	5		$	5
Interest cost	25			30
Amortization:
Net loss	14			12
Prior service credit	(11		)	(11		)
Curtailment gain	—			(26		)
Net postretirement health care costs	$	33		$	10