Property and Equipment, Net

12 Months Ended

Dec. 31, 2011

Property and Equipment, Net

Property and Equipment, Net

9. Property and Equipment, Net

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

		At December 31,
		2011		2010
Land		$	1	$	1
Buildings			5		5
Leasehold improvements			72		57
Computer equipment			406		386
Office furniture and other equipment			49		63
	Total cost of property and equipment		533		512
Less accumulated depreciation			(370)		(343)
	Property and equipment, net	$	163	$	169

Depreciation expense for the years ended December 31, 2011, 2010, and 2009was $75 million, $68 million, and $76 million, respectively.

Rental expenses were $38 million, $37 million and $38 million for the years ended December 31, 2011, 2010, and 2009, respectively.