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

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- Definition Revenue From Agencies And U S Government To Total Revenue + Details
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Namespace Prefix: | caci
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration