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Cover Page - USD ($)
 12 Months Ended
Jul. 31, 2024
Sep. 26, 2024
Jan. 31, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jul. 31, 2024    
Current Fiscal Year End Date --07-31    
Document Transition Report false    
Entity Registrant Name COPART, INC.    
Entity Incorporation, State or Country Code DE    
Entity File Number 000-23255    
Entity Tax Identification Number 94-2867490    
Entity Address, Address Line One 14185 Dallas Parkway    
Entity Address, Address Line Two Suite 300    
Entity Address, City or Town Dallas    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75254    
City Area Code 972    
Local Phone Number 391-5000    
Title of 12(b) Security Common Stock, par value $0.0001    
Trading Symbol CPRT    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction Flag false    
Entity Shell Company false    
Entity Public Float     $ 41,839,136,068
Entity Common Stock, Shares Outstanding   963,287,376  
Documents Incorporated by Reference Portions of our definitive Proxy Statement for the 2024 Annual Meeting of Stockholders, also referred to in this Annual Report on Form 10-K as our Proxy Statement, which will be filed with the Securities and Exchange Commission, or SEC, pursuant to Regulation 14A within 120 days after the registrant’s fiscal year end of July 31, 2024, have been incorporated by reference in Part III hereof. Except with respect to the information specifically incorporated by reference, the Proxy Statement is not deemed to be filed as a part hereof.    
Entity Central Index Key 0000900075    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false