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Balance Sheet Components
 12 Months Ended
Dec. 31, 2014
Balance Sheet Components [Abstract]  
Details of Certain Balance Sheet Components
Balance Sheet Components

Property and Equipment
 
As of December 31,
2014
 
2013
(In millions)
Property and equipment:
 
 
 
Computer equipment and software
$
6,073

 
$
5,179

Land and buildings, including building improvements
943

 
931

Leasehold improvements
549

 
512

Furniture and fixtures
350

 
290

Construction in progress and other
331

 
208

 
8,246

 
7,120

Accumulated depreciation
(5,344
)
 
(4,360
)
 
$
2,902

 
$
2,760


Total depreciation expense on our property and equipment in the years ended December 31, 2014, 2013 and 2012 totaled $1.1 billion, $976 million and $767 million, respectively.

 Accrued Expenses and Other Current Liabilities

Total compensation and related benefits included in accrued expenses and other current liabilities was $782 million and $672 million for the years ended December 31, 2014 and 2013, respectively.