Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Net periodic benefit costs

The components of net periodic benefit costs, reported in other expenses, were as follows:

	Three Months Ended March 31,
	2019						2018
	Pension Benefits			Other Postretirement Benefits			Pension Benefits			Other Postretirement Benefits
	(In millions)
Service costs	$	58		$	1		$	60		$	1
Interest costs	104			13			96			11
Expected return on plan assets	(122		)	(16		)	(133		)	(18		)
Amortization of net actuarial (gains) losses	48			(12		)	44			(8		)
Amortization of prior service costs (credit)	(4		)	(3		)	—			(5		)
Net periodic benefit costs (credit)	$	84		$	(17	)	$	67		$	(19	)