Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Lease Expense

A summary of lease expense and operating lease commitments is as follows:

	Years Ended December 31,
	2018		2017		2016
Lease expense	$	30	$	29	$	24

Schedule of Future Minimum Rental Payments for Operating Leases

	Years Ending December 31,
	2019		2020		2021		2022		2023		Thereafter		Total
Operating lease commitments	$	27	$	26	$	25	$	23	$	19	$	47	$	167