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Discontinued Operations (Details) (USD $) In Millions | 9 Months Ended
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Apr. 30, 2009
Discontinued Operations and Disposal Groups [Abstract] |
Early payment of the note receivable | $ 12

X
- Definition Represents the cash received on prepayment of notes receivable, received on disposal of discontinued operations. + Details
Name: | cprt_PrepaymentOfNotesReceivableOnDisposalGroupIncludingDiscontinuedOperations
Namespace Prefix: | cprt
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration