Long-Term Debt (Details)		3 Months Ended
	Dec. 21, 2021 USD ($)	Oct. 31, 2024 USD ($)	Jul. 31, 2024 USD ($)	Dec. 20, 2021 USD ($)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt offering costs	$ 2,700,000
Revolving Credit Facility | Second Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Outstanding borrowings		$ 0	$ 0
Maximum leverage	50,000,000
Minimum liquidity	$ 75,000,000
Total consolidated net leverage ratio		1.94
Minimum liquidity		$ 4,900,000,000
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Scenario 1
Line of Credit Facility [Line Items]
Line of credit facility, covenant terms	3.25
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Scenario 2
Line of Credit Facility [Line Items]
Line of credit facility, covenant terms	3.50
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Minimum
Line of Credit Facility [Line Items]
Line of credit facility, commitment fee percentage		0.175%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Minimum | Base Rate
Line of Credit Facility [Line Items]
Line of credit facility, commitment fee percentage		1.00%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Minimum | Daily Rate
Line of Credit Facility [Line Items]
Applicable interest rate added to reference rate in order to compute variable interest rate		0.00%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Maximum
Line of Credit Facility [Line Items]
Line of credit facility, commitment fee percentage		0.275%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Maximum | Base Rate
Line of Credit Facility [Line Items]
Line of credit facility, commitment fee percentage		1.75%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Maximum | Daily Rate
Line of Credit Facility [Line Items]
Applicable interest rate added to reference rate in order to compute variable interest rate		0.75%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Wells Fargo, National Association, Truist Bank, BMO Harris Bank N.A., Santander Bank N.A., and Bank of America, N.A.
Line of Credit Facility [Line Items]
Line of credit facility, increase (decrease), net	$ 200,000,000
Maximum borrowing capacity	1,250,000,000
Outstanding borrowings	100,000,000			$ 60,000,000
Letter of Credit | Second Amended and Restated Credit Agreement | Wells Fargo, National Association, Truist Bank, BMO Harris Bank N.A., Santander Bank N.A., and Bank of America, N.A.
Line of Credit Facility [Line Items]
Maximum borrowing capacity	550,000,000
Letter of Credit | Second Amended and Restated Credit Agreement | Wells Fargo, National Association, Truist Bank, BMO Harris Bank N.A., Santander Bank N.A., and Bank of America, N.A. | CPRT GmbH
Line of Credit Facility [Line Items]
Maximum borrowing capacity	150,000,000
Letter of Credit | Second Amended and Restated Credit Agreement | Wells Fargo, National Association, Truist Bank, BMO Harris Bank N.A., Santander Bank N.A., and Bank of America, N.A. | Copart Autos España, S.L.U.
Line of Credit Facility [Line Items]
Maximum borrowing capacity	150,000,000
Letter of Credit | Second Amended and Restated Credit Agreement | Wells Fargo, National Association, Truist Bank, BMO Harris Bank N.A., Santander Bank N.A., and Bank of America, N.A. | Copart UK Limited
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 250,000,000