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LEASES (Detail Textuals) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Leases [Abstract] |  |  |
Operating leases expiration term | 10 years |  |
Net sublease rental income | $ 0.2 |  |
Non-cancelable sublease rental income receivable period | 28 months |  |
Operating lease rental expenses | $ 54.6 | $ 51.8 | $ 50.6

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- Definition Non Cancelable Sublease Rental Income Receivable Period + References No definition available. + Details
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Namespace Prefix: | caci_
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- Definition Operating Lease Expiration Term + References No definition available. + Details
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Namespace Prefix: | caci_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Contractually required future rental payments receivable on noncancelable subleasing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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