Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

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 Nine Months Ended September 30,						For the Three Months Ended September 30,
	2015			2014			2015			2014
	(in millions)
Service cost	$	65		$	51		$	22		$	17
Interest cost	252			258			84			86
Expected return on plan assets	(405		)	(389		)	(135		)	(129		)
Amortization:
Net loss	175			111			58			36
Prior service cost	6			8			2			3
Net periodic pension cost	$	93		$	39		$	31		$	13

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 Nine Months Ended September 30,						For the Three Months Ended September 30,
	2015			2014			2015			2014
	(in millions)
Service cost	$	13		$	11		$	4		$	3
Interest cost	75			80			24			26
Amortization:
Net loss	33			17			10			3
Prior service credit	(30		)	(32		)	(10		)	(11		)
Net postretirement health care costs	$	91		$	76		$	28		$	21