Fair Value of Financial Instruments (Detail Textuals)	6 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]
Business combination contingent consideration period	two and three year periods

Represents business combination contingent consideration period for achieving earnings targets.

No definition available.

Name:	caci_BusinessCombinationContingentConsiderationPeriod
Namespace Prefix:	caci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration