Pension and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 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				Three Months Ended
	March 31,				March 31,
(In millions)	2016		2015		2016		2015
Service cost	$	-	$	1	$	-	$	-
Interest cost		50		48		3		3
Expected long-term return on plan assets		(62)		(66)		-		-
Amortization of:
Net loss from past experience		17		17		-		-
Prior service cost		-		-		(1)		(1)
Net cost	$	5	$	-	$	2	$	2