Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Commitments for Operating Leases

The following table summarizes our minimum commitments under noncancelable operating leases having initial terms in excess of one year, primarily for property:

	2018			2019			2020			2021			2022			Thereafter
Minimum commitments(a)	$	284		$	268		$	222		$	189		$	123		$	372
Sublease income	(62		)	(63		)	(50		)	(43		)	(38		)	(166		)
Net minimum commitments	$	222		$	205		$	172		$	146		$	85		$	206

__________

(a) Certain leases contain escalation clauses and renewal or purchase options.