Employment Benefit Plans

9 Months Ended

Sep. 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 September 30,
Net Cost	2016			2015
Service cost	$	12		$	12
Interest cost	23			23
Expected return on plan assets	(35		)	(34		)
Net cost recognized	$	—		$	1

	Pension Benefits
	Nine Months Ended September 30,
Net Cost	2016			2015
Service cost	$	35		$	36
Interest cost	71			68
Expected return on plan assets	(107		)	(104		)
Amortization of net loss	—			1
Net cost recognized	$	(1	)	$	1

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

	Retiree Health and Welfare Benefits
	Nine Months Ended September 30,
Net Cost	2016			2015
Service cost	$	1		$	1
Interest cost	8			7
Amortization of prior service credits	(2		)	(2		)
Amortization of net loss	—			2
Net cost recognized	$	7		$	8