Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2014

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

Schedule of Defined Benefit Plans Disclosures

The components of pension and other postretirement benefit expense (income) for the three and nine months ended September 30, 2014 and 2013 were (in millions):

	Pension Benefits
	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Service cost	$	12		$	13		$	38		$	27
Interest cost	7			9			24			22
Expected return on plan assets	(6		)	(6		)	(21		)	(18		)
Amortization of prior service cost	—			1			1			1
Recognized net actuarial loss	3			3			10			16
Net Periodic Benefit Expense	$	16		$	20		$	52		$	48
	Other Postretirement Benefits
	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Service cost	$	—		$	—		$	2		$	3
Interest cost	1			1			2			2
Amortization of prior service credit	(8		)	(8		)	(25		)	(27		)
Recognized net actuarial loss	1			1			4			6
Recognized curtailment gain	—			(17		)	—			(17		)
Net Periodic Benefit Income	$	(6	)	$	(23	)	$	(17	)	$	(33	)