Business Segment, Customer And Geographic Information (Narrative) (Details)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Business Segment, Customer And Geographic Information [Abstract]
Agencies and U.S. Government revenue percentage	94.50%	94.90%	94.80%

Revenue From Agencies And U S Government To Total Revenue

No definition available.

Name:	caci_RevenueFromAgenciesAndUSGovernmentToTotalRevenue
Namespace Prefix:	caci_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant