Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Lease Commitments Under Noncancellable Operating Leases

Future minimum lease commitments under noncancellable operating leases with initial or remaining terms of one year or more as of December 31, 2017, are payable as follows (in millions):

2018	$	36
2019		25
2020		18
2021		11
2022		8
Thereafter		11
Total future lease commitments	$	109