| Document and Entity Information Document | Mar. 02, 2022 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Mar. 2, 2022 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.0001 |
| Trading Symbol | CPRT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000900075 |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 to Form 8-K (this "Amendment") is being filed to amend, replace, and supersede in its entirety the 8-K filed by Copart, Inc. (the "Company"), which was originally filed with the Securities and Exchange Commission on February 16, 2022 (the "First 8-K"). In the First 8-K, $374.8 million of Treasury Bills were shown in cash equivalents, but should instead have been presented as short-term investments on the consolidated balance sheet. Furthermore, the Company should have shown a purchase of held to maturity securities in the investing section of the statement of cash flows for $374.8 million. The reclassified entries for these items are presented in this Amendment. |
