Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Aggregate undiscounted non-cancelable future minimum rental payments under operating leases are as follows (in millions):

2019	$	89
2020	78
2021	66
2022	60
2023	52
Thereafter	229
Total	$	574