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Product Warranties (Tables)
3 Months Ended
Oct. 31, 2018
Guarantees and Product Warranties [Abstract]  
Schedule of Changes in Product Warranty Liabilities

Changes in our product warranty liabilities during the indicated periods are as follows:

 

     Three Months Ended
October  31,
 
     2018      2017  

Beginning balance

   $ 264,928      $ 216,781  

Provision

     69,767        63,833  

Payments

     (62,946      (48,615
  

 

 

    

 

 

 

Ending balance

   $ 271,749      $ 231,999