Pension And Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2012

Pension and Other Postretirement Benefits [Abstract]

Components of pension expense for the defined benefit pension plan

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
				(in millions)
Service cost – benefits earned during the period	$	3		$	2		$	4		$	3
Interest cost on projected benefit obligation		12			9			21			17
Expected return on assets		(17	)		(11	)		(27	)		(19	)
Recognized losses		7			4			12			8
Pension expense	$	5		$	4		$	10		$	9

Net periodic benefit cost for postretirement medical plan benefits other than pensions

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in millions)
Service cost – benefits earned during the period	$	-	$	-	$	-	$	-
Interest cost		2		1		3		2
Pension expense	$	2	$	1	$	3	$	2