Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Net periodic benefit cost for the pension and other postretirement benefit plans included the following components (in millions):

	Three-Month Periods						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2015			2014			2015			2014
Pension:
Service cost	$	1		$	2		$	3		$	4
Interest cost	13			14			40			42
Expected return on plan assets	(19		)	(19		)	(58		)	(57		)
Net amortization	10			7			31			22
Net periodic benefit cost	$	5		$	4		$	16		$	11
Other postretirement:
Service cost	$	—		$	1		$	2		$	4
Interest cost	4			7			12			21
Expected return on plan assets	(5		)	(8		)	(17		)	(23		)
Net amortization	(1		)	1			(3		)	2
Net periodic benefit cost	$	(2	)	$	1		$	(6	)	$	4