Defined Benefit Postretirement Plans (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The following summarizes the components of net periodic benefit cost:

	Pension Benefits						Other Benefits
	Three Months Ended March 31,
(In millions)	2019			2018			2019			2018
Service cost	$	4		$	4		$	—		$	1
Interest cost	7			7			1			2
Expected return on plan assets	(8		)	(9		)	—			—
Amortization:
– prior service credit	(2		)	(2		)	(4		)	(2		)
– actuarial loss	2			3			—			—
Net settlement loss(a)	—			4			—			—
Net periodic benefit cost(b)	$	3		$	7		$	(3	)	$	1

^(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)  Net periodic benefit cost reflects a calculated market-related value of plan assets which recognizes changes in fair value over three years.