Employee Benefit Plans (Tables)

6 Months Ended

Jun. 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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2015			2014			2015			2014
Pension:
Service cost	$	1		$	1		$	2		$	2
Interest cost	14			14			27			28
Expected return on plan assets	(20		)	(19		)	(39		)	(38		)
Net amortization	11			7			21			15
Net periodic benefit cost	$	6		$	3		$	11		$	7
Other postretirement:
Service cost	$	1		$	2		$	2		$	3
Interest cost	4			7			8			14
Expected return on plan assets	(6		)	(7		)	(12		)	(15		)
Net amortization	(1		)	—			(2		)	1
Net periodic benefit cost	$	(2	)	$	2		$	(4	)	$	3