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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018, are payable as follows (in millions):

	Capital Lease		Operating Lease
	Payments		Payments
2019	$	15	$	126
2020		15		106
2021		15		88
2022		15		68
2023		15		51
Thereafter		262		293
Total future lease commitments	$	337	$	732