Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2017

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 September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
(In millions)
Service cost	$	2		$	2		$	6		$	6
Interest cost		30			33			89			97
Expected return on plan assets		(43	)		(45	)		(129	)		(133	)
Amortization of unrecognized net loss		10			11			32			34
Settlement charge		7			1			10			3
Net periodic benefit cost	$	6		$	2		$	8		$	7
	Other Postretirement Benefits
	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
(In millions)
Service cost				$	1					$	1
Interest cost	$	1			1		$	2			2
Expected return on plan assets		(1	)		(1	)		(3	)		(3	)
Amortization of unrecognized prior service benefit		(1	)		(1	)		(2	)		(3	)
Net periodic benefit cost	$	(1	)	$	-		$	(3	)	$	(3	)