Penson and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Pension And Other Postretirement Benefit Expense Table [Abstract]

Pension and OPEB Cost

	Pension Benefits								Other Postretirement Benefits
	Three Months Ended				Three Months Ended
	March 31,				March 31,
(In millions)	2012		2011		2012		2011
Service cost	$	1	$	1	$	-	$	-
Interest cost		49		57		4		5
Expected long-term return on plan assets		(67)		(65)		-		-
Amortization of:
Net loss from past experience		15		9		-		-
Prior service cost		-		-		(3)		(4)
Settlement loss		6		-		-		-
Net pension cost	$	4	$	2	$	1	$	1