Defined Benefit Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2019

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The following summarizes the components of net periodic benefit cost:

	Three Months Ended June 30,
	Pension Benefits						Other Benefits
(In millions)	2019			2018			2019			2018
Service cost	$	5		$	5		$	—		$	—
Interest cost	7			6			1			2
Expected return on plan assets	(8		)	(8		)	—			—
Amortization:
– prior service cost (credit)	(2		)	(3		)	(4		)	(2		)
– actuarial loss	2			3			—			1
Net settlement loss(a)	2			2			—			—
Net periodic benefit cost(b)	$	6		$	5		$	(3	)	$	1

	Six Months Ended June 30,
	Pension Benefits						Other Benefits
(In millions)	2019			2018			2019			2018
Service cost	$	9		$	9		$	—		$	1
Interest cost	14			13			2			4
Expected return on plan assets	(16		)	(17		)	—			—
Amortization:
– prior service credit	(4		)	(5		)	(8		)	(4		)
– actuarial loss	4			6			—			1
Net settlement loss(a)	2			6			—			—
Net periodic benefit cost(b)	$	9		$	12		$	(6	)	$	2

^(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.