XML 12 R1.htm IDEA: XBRL DOCUMENT v3.19.1
Document and Entity Information - shares
 9 Months Ended
Apr. 30, 2019
May 28, 2019
Entity Information [Line Items]    
Document Type 10-Q  
Document Period End Date Apr. 30, 2019  
Entity Registrant Name COPART INC  
Entity Central Index Key 0000900075  
Current Fiscal Year End Date --07-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus (i.e. Q1,Q2,Q3,FY) Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   229,112,884