Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components of net defined benefit plan costs

	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)	2016		2015		2016		2015		2016		2015		2016		2015
Service cost	$	-	$	1	$	1	$	2	$	-	$	-	$	-	$	-
Interest cost		50		49		149		146		3		3		8		8
Expected long-term return on plan assets		(62)		(66)		(186)		(199)		-		-		-		-
Amortization of:
Net loss from past experience		17		17		50		52		-		-		-		-
Prior service cost		-		-		-		-		(1)		(1)		(2)		(2)
Net cost	$	5	$	1	$	14	$	1	$	2	$	2	$	6	$	6