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INVESTMENTS IN JOINT VENTURES (Detail Textuals) - USD ($) $ in Millions | 1 Months Ended |
--- | --- | ---
Jul. 31, 2009 | Jun. 30, 2016
Schedule of Equity Method Investments [Line Items] |  |
Note receivable, AC First redemption |  | $ 5.0
AC FIRST LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
CACI's percentage of ownership interest | 49.00% |
JV partner's percentage of ownership interest | 51.00% |
Percentage of investment distributed |  | 90.00%
Percentage of investment remaining to be distributed |  | 10.00%

X
- Definition Represents amount currently receivable related to the Company's redemption of it's interest in AC First. + References No definition available. + Details
Name: | caci_NoteReceivableAcFirstRedemption
Namespace Prefix: | caci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Ownership Percentage Of Joint Venture Partner + References No definition available. + Details
Name: | caci_OwnershipPercentageOfJointVenturePartner
Namespace Prefix: | caci_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of CACI's investment in the joint venture that is currently receivable as of the period end. + References No definition available. + Details
Name: | caci_PercentageOfInvestmentDistributed
Namespace Prefix: | caci_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of CACI's investment in the joint venture that is not currently receivable as of the period end. + References No definition available. + Details
Name: | caci_PercentageOfInvestmentRemainingToBeDistributed
Namespace Prefix: | caci_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=caci_AcFirstLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |