Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2014

Pension Plan [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic pension cost consisted of the following:

		For the Three Months Ended March 31,
		2014			2013
	(in millions)
Service cost		$	17		$	21
Interest cost		86			78
Expected return on plan assets		(130		)	(123		)
Amortization:
Net loss		38			69
Prior service cost		3			3
Net periodic pension cost		$	14		$	48

Other Postretirement Benefit Plan, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net postretirement health care costs consisted of the following:

	For the Three Months Ended March 31,
	2014			2013
	(in millions)
Service cost	$	4		$	5
Interest cost	27			25
Amortization:
Net loss	7			14
Prior service credit	(11		)	(11		)
Net postretirement health care costs	$	27		$	33