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Subsequent Events (Detail Textuals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Apr. 01, 2015 Associate
Subsequent Event [Line Items]
Revenue	$ 817,797us-gaap_Revenues	$ 900,393us-gaap_Revenues	$ 2,447,946us-gaap_Revenues	$ 2,658,844us-gaap_Revenues
LTC Engineering Associates, Inc
Subsequent Event [Line Items]
Revenue					$ 16,000us-gaap_Revenues / dei_LegalEntityAxis = caci_LtcEngineeringAssociatesIncMember
Subsequent Event | LTC Engineering Associates, Inc
Subsequent Event [Line Items]
Number of associates						50dei_EntityNumberOfEmployees / dei_LegalEntityAxis = caci_LtcEngineeringAssociatesIncMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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