Employee Retirement Plans

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Employee Retirement Plans

EMPLOYEE RETIREMENT PLANS

Net periodic pension cost for our defined-benefit pension plans, with the exception of service cost, is recorded in other income (expense), net, in our condensed consolidated statement of operations. Net periodic pension cost for our defined-benefit pension plans was as follows, in millions: 

	Three Months Ended June 30,
	2018					2017
	Qualified			Non-Qualified		Qualified			Non-Qualified
Service cost	$	—		$	—	$	—		$	—
Interest cost	10			2		13			2
Expected return on plan assets	(12		)	—		(12		)	—
Amortization of net loss	5			—		5			—
Net periodic pension cost	$	3		$	2	$	6		$	2

	Six Months Ended June 30,
	2018					2017
	Qualified			Non-Qualified		Qualified			Non-Qualified
Service cost	$	1		$	—	$	1		$	—
Interest cost	20			3		25			3
Expected return on plan assets	(24		)	—		(24		)	—
Amortization of net loss	9			1		10			1
Net periodic pension cost	$	6		$	4	$	12		$	4

As of January 1, 2010, substantially all of our domestic and foreign qualified and domestic non-qualified defined-benefit pension plans were frozen to future benefit accruals.