Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2012

Retirement Plans [Abstract]

Net periodic benefit cost components

	Three Months Ended September 30,						Nine Months Ended September 30,
Pension Benefits	2012			2011			2012			2011
	(In millions)
Service cost	$	6		$	4		$	18		$	14
Interest cost		14			14			42			42
Expected return on plan assets		(19	)		(18	)		(57	)		(55	)
Amortization of net loss		5			2			16			6
Amortization of prior service cost		1			1			3			3
Net periodic benefit cost	$	7		$	3		$	22		$	10

	Three Months Ended September 30,					Nine Months Ended September 30,
Other Postretirement Benefits	2012		2011			2012		2011
	(In millions)
Service cost	$	1	$	1		$	4	$	3
Interest cost		3		3			7		8
Amortization of net loss		—		(1	)		—		(1	)
Net periodic benefit cost	$	4	$	3		$	11	$	10