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%

Represents amount currently receivable related to the Company's redemption of it's interest in AC First.

No definition available.

Name:	caci_NoteReceivableAcFirstRedemption
Namespace Prefix:	caci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- 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

- 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

- 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

- 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

- Details

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