Property and Equipment, Net

12 Months Ended

Dec. 31, 2016

Property and equipment, net was comprised of the following (amounts in millions):



	At December 31,
	2016			2015
Land	$	1		$	1
Buildings	4			4
Leasehold improvements	162			109
Computer equipment	560			431
Office furniture and other equipment	78			52
Total cost of property and equipment	805			597
Less accumulated depreciation	(547		)	(408		)
Property and equipment, net	$	258		$	189

Depreciation expense for the years ended December 31, 2016, 2015, and 2014 was $121 million, $82 million, and $76 million, respectively.

Rental expense was $65 million, $39 million and $38 million for the years ended December 31, 2016, 2015, and 2014, respectively.