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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Commitments Under Capital Leases and Noncancellable Operating Leases with Initial or Remaining Terms of One Year or More

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


	Capital Lease Payments		Operating Lease Payments
2018	$	15	$	130
2019		15		98
2020		15		82
2021		15		67
2022		15		55
Thereafter		273		339

Total future lease commitments	$	348	$	771