Employee Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Schedule of net periodic pension cost for the Company's defined-benefit pension 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 March 31,
	2021				2020
	Qualified		Non-Qualified		Qualified		Non-Qualified
Service cost	$	1	$	—	$	1	$	—
Interest cost	8		1		6		1
Expected return on plan assets	(4)		—		(6)		—
Amortization of net loss	6		1		6		1
Net periodic pension cost	$	11	$	2	$	7	$	2