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Sales of Receivables - Summary of MARPA Facility Activity (Parentheticals) (Detail) $ in Millions | 3 Months Ended
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Sep. 30, 2019 USD ($)
Transfers And Servicing Of Financial Assets [Abstract] |
Cash provided (used) by MARPA Facility | $ (11.4)

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

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