Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Components of net periodic cost (benefit)

Net Periodic Cost (Benefit)

Periods ended September 30	Three Months						Nine Months
(In millions)	2013			2012			2013			2012
Pension cost (benefit)
Service cost	$	3		$	3		$	9		$	9
Interest cost on projected benefit obligation	30			34			90			101
Expected return on plan assets	(45		)	(43		)	(135		)	(128		)
Amortization of net actuarial (gain) loss	10			10			34			29
Settlement loss	3			—			3			—
Net periodic pension cost (benefit)	$	1		$	4		$	1		$	11
Postretirement cost (benefit)
Interest cost on projected benefit obligation	$	—		$	1		$	1		$	2
Amortization of prior service credit	(4		)	(4		)	(13		)	(13		)
Amortization of net actuarial (gain) loss	1			—			1			—
Net periodic postretirement cost (benefit)	$	(3	)	$	(3	)	$	(11	)	$	(11	)