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BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION (Detail Textuals) - Segment | 12 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
Revenue, Major Customer [Line Items] |  |  |
Number of reportable segments | 2 |  |
Sales |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue percentage | 100.00% | 100.00% | 100.00%
U.S. Government | Sales |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue percentage | 93.50% | 93.70% | 94.00%

X
- Definition Represents major customer revenue percentage. + References No definition available. + Details
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Namespace Prefix: | caci_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=caci_AgenciesAndUSGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |