Commitment and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

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

2018	$	77
2019	71
2020	61
2021	49
2022	46
Thereafter	215
Total	$	519