Employment Benefit Plans

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Employment Benefit Plans

Employment Benefit Plans

Components of the net cost for the periods presented below for certain employee benefit plans were as follows (in millions):

	Pension Benefits
	Three Months Ended June 30,
Net Cost	2016			2015
Service cost	$	11		$	12
Interest cost	24			22
Expected return on plan assets	(36		)	(35		)
Amortization of net loss	—			1
Net cost recognized	$	(1	)	$	—

	Pension Benefits
	Six Months Ended June 30,
Net Cost	2016			2015
Service cost	$	23		$	24
Interest cost	48			45
Expected return on plan assets	(72		)	(70		)
Amortization of net loss	—			1
Net cost recognized	$	(1	)	$	—

	Retiree Health and Welfare Benefits
	Three Months Ended June 30,
Net Cost	2016			2015
Service cost	$	1		$	—
Interest cost	2			3
Amortization of prior service credits	(1		)	—
Net cost recognized	$	2		$	3

	Retiree Health and Welfare Benefits
	Six Months Ended June 30,
Net Cost	2016			2015
Service cost	$	1		$	—
Interest cost	5			5
Amortization of prior service credits	(1		)	(1		)
Amortization of net loss	—			1
Net cost recognized	$	5		$	5