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Sales of Receivables - Summary of MARPA Activity (Parentheticals) (Detail) $ in Millions | 9 Months Ended
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Mar. 31, 2020 USD ($)
Transfers And Servicing Of Financial Assets [Abstract] |
Cash provided (used) by MARPA | $ 1.0

X
- Definition Cash provided (used) by MARPA. + References No definition available. + Details
Name: | caci_CashProvidedUsedByMARPA
Namespace Prefix: | caci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TransfersAndServicingOfFinancialAssetsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration