Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

The following table presents the components of net periodic (benefit) cost for the plans:

	Pension Benefits
	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
(In millions)
Service cost	$	2		$	2		$	4		$	4
Interest cost		28			29			55			59
Expected return on plan assets		(45	)		(43	)		(90	)		(86	)
Amortization of unrecognized net loss		10			11			21			22
Settlement charge		3			1			7			3
Net periodic (benefit) cost	$	(2	)	$	-		$	(3	)	$	2
	Other Postretirement Benefits
	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
(In millions)
Interest cost							$	1		$	1
Expected return on plan assets	$	(1	)	$	(1	)		(2	)		(2	)
Amortization of unrecognized prior service benefit								(1	)		(1	)
Net periodic (benefit) cost	$	(1	)	$	(1	)	$	(2	)	$	(2	)