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Property and Equipment, Net (Tables)
12 Months Ended
Sep. 30, 2019
Property, Plant and Equipment [Abstract]  
Components of Property and Equipment, Net

The components of property and equipment, net are:

 

     As of September 30,  
     2019      2018  

Computers, related equipment and software

   $ 1,109,465      $ 1,027,825  

Building and land

     109,446        97,782  

Leasehold improvements

     230,817        222,812  

Furniture, fixtures and other

     47,813        43,518  
  

 

 

    

 

 

 

Property and equipment, gross

     1,497,541        1,391,937  

Less accumulated depreciation

     (972,227      (895,352
  

 

 

    

 

 

 

Property and equipment, net

   $ 525,314      $ 496,585