Cover - shares	3 Months Ended
	Oct. 31, 2021	Nov. 18, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 31, 2021
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller reporting company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		237,188,461
Entity Central Index Key	0000900075
Current Fiscal Year End Date	--07-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false