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Property and Equipment, net
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property and Equipment, net
Property and Equipment, net
Property and equipment, net consisted of:
 
As of December 31,
 
2013
 
2012
Land
$
56

 
$
58

Buildings and leasehold improvements
549

 
521

Capitalized software
494

 
419

Furniture, fixtures and equipment
374

 
319

Buses and support vehicles
74

 
64

Projects in process
64

 
37

 
1,611

 
1,418

Less: Accumulated depreciation and amortization
(997
)
 
(889
)
Property and equipment, net
$
614

 
$
529


Depreciation and amortization expense relating to property and equipment during 2013, 2012 and 2011 was $124 million, $104 million and $88 million, respectively (including $36 million, $30 million and $26 million, respectively, of amortization expense relating to capitalized software).