Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2013

Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic pension cost consisted of the following:

	For the Nine Months Ended September 30,						For the Three Months Ended September 30,
	2013			2012			2013			2012
	(in millions)
Service cost	$	65		$	59		$	22		$	19
Interest cost	235			258			78			86
Expected return on plan assets	(370		)	(331		)	(123		)	(110		)
Amortization:
Net loss	203			168			67			56
Prior service cost	8			8			3			3
Net periodic pension cost	$	141		$	162		$	47		$	54

Postretirement [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net postretirement health care costs consisted of the following:

	For the Nine Months Ended September 30,						For the Three Months Ended September 30,
	2013			2012			2013			2012
	(in millions)
Service cost	$	13		$	16		$	3		$	5
Interest cost	74			87			23			27
Amortization:
Net loss	38			34			10			10
Prior service credit	(33		)	(32		)	(11		)	(9		)
Curtailment gain	—			(26		)	—			—
Net postretirement health care costs	$	92		$	79		$	25		$	33