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Balance Sheet Components
 12 Months Ended
Dec. 31, 2013
Balance Sheet Components [Abstract]  
Details of Certain Balance Sheet Components
Balance Sheet Components

Property and Equipment
 
As of December 31,
2013
 
2012
(In millions)
Property and equipment:
 
 
 
Computer equipment and software
$
5,179

 
$
4,170

Land and buildings, including building improvements
931

 
807

Leasehold improvements
512

 
413

Furniture and fixtures
290

 
220

Construction in progress and other
208

 
347

 
7,120

 
5,957

Accumulated depreciation
(4,360
)
 
(3,466
)
 
$
2,760

 
$
2,491


Total depreciation expense on our property and equipment in the years ended December 31, 2013, 2012 and 2011 totaled $976 million, $767 million and $603 million, respectively.
Accrued Expenses and Other Current Liabilities
Total compensation and related benefits included in accrued expenses and other current liabilities was $672 million and $649 million for the years ended December 31, 2013 and 2012, respectively.