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Document And Entity Information (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2011 | Aug. 24, 2011 | Dec. 31, 2010
Document And Entity Information |  |  |
Document Type | 10-K |  |
Amendment Flag | false |  |
Document Period End Date | Jun. 30, 2011 |  |
Document Fiscal Year Focus | 2011 |  |
Document Fiscal Period Focus | FY |  |
Entity Registrant Name | CACI INTERNATIONAL INC /DE/ |  |
Entity Central Index Key | 0000016058 |  |
Current Fiscal Year End Date | --06-30 |  |
Entity Filer Category | Large Accelerated Filer |  |
Entity Well-known Seasoned Issuer | Yes |  |
Entity Voluntary Filers | No |  |
Entity Current Reporting Status | Yes |  |
Entity Common Stock, Shares Outstanding |  | 30,391,311 |
Entity Public Float |  |  | $ 1,567,662,785

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