Penson and Other Postretirement Benefit Plans (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2012

Sep. 30, 2012

Pension And Other Postretirement Benefit Expense Table [Abstract]

Pension and OPEB Cost

	Pension Benefits								Other Postretirement Benefits
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
(In millions)	2012		2011		2012		2011		2012		2011		2012		2011
Service cost	$	1	$	-	$	2	$	1	$	-	$	-	$	1	$	1
Interest cost		50		57		149		171		4		5		12		15
Expected long-term return on plan assets		(69)		(67)		(203)		(200)		-		-		-		-
Amortization of:
Net loss from past experience		15		10		45		29		-		-		-		-
Prior service cost		-		-		-		-		(3)		(4)		(9)		(12)
Settlement loss		-		-		6		-		-		-		-		-
Net cost	$	(3)	$	-	$	(1)	$	1	$	1	$	1	$	4	$	4

	Pension Benefits								Other Postretirement Benefits
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
(In millions)	2012		2011		2012		2011		2012		2011		2012		2011
Service cost	$	1	$	-	$	2	$	1	$	-	$	-	$	1	$	1
Interest cost		50		57		149		171		4		5		12		15
Expected long-term return on plan assets		(69)		(67)		(203)		(200)		-		-		-		-
Amortization of:
Net loss from past experience		15		10		45		29		-		-		-		-
Prior service cost		-		-		-		-		(3)		(4)		(9)		(12)
Settlement loss		-		-		6		-		-		-		-		-
Net cost	$	(3)	$	-	$	(1)	$	1	$	1	$	1	$	4	$	4