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Fixed Assets
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Fixed Assets
5. Fixed Assets

Major classes of fixed assets consist of the following (in millions):

 

     December 31,  
     2017     2016  

Office equipment

   $ 28.6     $ 22.5  

Furniture and fixtures

     112.3       96.7  

Leasehold improvements

     124.2       107.8  

Computer equipment

     147.9       131.4  

Land and buildings - corporate headquarters

     143.6       141.7  

Software

     291.9       268.4  

Other

     12.0       10.0  

Work in process

     20.1       10.6  
  

 

 

   

 

 

 
     880.6       789.1  

Accumulated depreciation

     (468.4     (411.5
  

 

 

   

 

 

 

Net fixed assets

   $ 412.2     $ 377.6  
  

 

 

   

 

 

 

The amounts in work in process in the table above primarily are for capitalized expenditures incurred related to IT development projects in 2017 and 2016.