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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