Defined Benefit Postretirement Plans (Tables)

3 Months Ended

Mar. 31, 2016

Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The following summarizes the components of net periodic benefit cost:

	Three Months Ended March 31,
	Pension Benefits						Other Benefits
(In millions)	2016			2015			2016			2015
Service cost	$	6		$	12		$	1		$	1
Interest cost	11			14			3			3
Expected return on plan assets	(15		)	(19		)	—			—
Amortization:
– prior service cost (credit)	(2		)	1			(1		)	(1		)
– actuarial loss	3			7			—			—
Net settlement loss(a)	48			17			—			—
Net curtailment loss (gain) (b)	—			1			—			(6		)
Net periodic benefit cost	$	51		$	33		$	3		$	(3	)

^(a)  Settlements are recognized as they occur, once it is probable that lump sum payments from a plan for a given year will exceed the plan's total service and interest cost for that year.

^(b)  Related to workforce reductions, which reduced the future expected years of service for employees participating in the plans