Business Segment, Customer And Geographic Information (Narrative) (Details)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Business Segment, Customer And Geographic Information
Agencies and U.S. Government revenue percentage	94.90%	94.80%	96.00%

Name:

caci_RevenueFromAgenciesAndUSGovernmentToTotalRevenue

Namespace Prefix:

caci

Data Type:

num:percentItemType

Balance Type:

na

Period Type:

instant