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BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION (Detail Textuals) - Segment	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Revenue, Major Customer [Line Items]
Number of reportable segments	2
Sales
Revenue, Major Customer [Line Items]
Revenue percentage	100.00%	100.00%	100.00%
Agencies and U.S. Government | Sales
Revenue, Major Customer [Line Items]
Revenue percentage	93.70%	94.00%	94.40%

X

- Definition

Represents major customer revenue percentage.

+ References

No definition available.

+ Details

Name:	caci_RevenuePercentage
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

Name:	us-gaap_EntityWideRevenueMajorCustomerLineItems
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

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesMember
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: