Property and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consisted of:

	As of December 31,
	2017			2016
Land	$	49		$	47
Buildings and leasehold improvements	626			597
Capitalized software	583			524
Furniture, fixtures and equipment	387			354
Projects in process	118			99
Buses and support vehicles	93			91
	1,856			1,712
Less: Accumulated depreciation and amortization	(1,152		)	(1,027		)
Property and equipment, net	$	704		$	685