Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

Net periodic benefit costs

The components of net periodic benefit costs were as follows:

	Three Months Ended September 30,
	2017						2016
	Pension Benefits			Other Postretirement Benefits			Pension Benefits			Other Postretirement Benefits
	(In millions)
Service costs	$	62		$	1		$	67		$	4
Interest costs	106			19			101			20
Divestitures and curtailment costs (1)	3			2			(1		)	(1		)
Expected return on plan assets	(129		)	(18		)	(138		)	(19		)
Amortization of net actuarial (gains) losses	46			—			45			2
Amortization of prior service costs (credit)	—			(6		)	—			(1		)
Net periodic benefit costs (credit)	$	88		$	(2	)	$	74		$	5
	Nine Months Ended September 30,
	2017						2016
	Pension Benefits			Other Postretirement Benefits			Pension Benefits			Other Postretirement Benefits
	(In millions)
Service costs	$	184		$	4		$	212		$	8
Interest costs	318			57			316			62
Divestitures and curtailment costs (1)	3			2			(1		)	15
Expected return on plan assets	(387		)	(54		)	(388		)	(56		)
Amortization of net actuarial (gains) losses	143			—			143			7
Amortization of prior service costs (credit)	(1		)	(17		)	—			(5		)
Net periodic benefit costs (credit)	$	260		$	(8	)	$	282		$	31

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(1) For the nine months ended September 30, 2016, the Company recognized curtailment charges on certain postretirement benefit plans in connection with the sale to MassMutual. See Note 3 of the Notes to the Consolidated Financial Statements included in the 2016 Annual Report.