Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Components of net periodic cost (benefit)

Net Periodic Cost (Benefit)

Periods ended June 30	Three Months						Six Months
(In millions)	2014			2013			2014			2013
Pension benefit
Service cost	$	1		$	3		$	4		$	6
Interest cost on projected benefit obligation	33			30			66			60
Expected return on plan assets	(48		)	(45		)	(96		)	(90		)
Amortization of net actuarial loss	7			12			13			24
Net periodic pension benefit	$	(7	)	$	—		$	(13	)	$	—
Postretirement benefit
Interest cost on projected benefit obligation	$	1		$	1		$	1		$	1
Amortization of prior service credit	(5		)	(5		)	(9		)	(9		)
Curtailment gain	(86		)	—			(86		)	—
Net periodic postretirement benefit	$	(90	)	$	(4	)	$	(94	)	$	(8	)