Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Net periodic benefit costs

The components of net periodic benefit costs were as follows:

	Three Months   Ended   March 31,
	2016						2015
	Pension Benefits			Other Postretirement Benefits			Pension Benefits			Other Postretirement Benefits
	(In millions)
Service costs	$	72		$	2		$	69		$	4
Interest costs	111			21			105			23
Curtailment costs (1)	—			30			—			—
Expected return on plan assets	(127		)	(18		)	(136		)	(20		)
Amortization of net actuarial (gains) losses	49			2			48			10
Amortization of prior service costs (credit)	—			(3		)	—			(1		)
Net periodic benefit costs (credit)	$	105		$	34		$	86		$	16

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(1) During the three months ended March 31, 2016, the Company recognized curtailment charges on certain postretirement benefit plans in connection with the purchase agreement with MassMutual. See Note 3.