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Fixed Assets
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Fixed Assets
Fixed Assets
Fixed assets at December 31, 2017 and 2016 consisted of the following:
 
December 31,
 
2017
 
2016
Land
$
9,333

 
$
9,908

Buildings
207,024

 
185,431

Capitalized software
224,753

 
192,395

Machinery and equipment
703,924

 
610,597

 
1,145,034

 
998,331

Accumulated depreciation
(765,990
)
 
(683,728
)
Property, plant and equipment, net
$
379,044

 
$
314,603

 
 
 
 
Rental property and equipment
$
394,627

 
$
400,913

Accumulated depreciation
(208,886
)
 
(212,859
)
Rental property and equipment, net
$
185,741

 
$
188,054


Depreciation expense was $149 million, $140 million and $136 million for the years ended December 31, 2017, 2016 and 2015, respectively.