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Document And Entity Information
 6 Months Ended
Dec. 31, 2014
Jan. 26, 2015
Document And Entity Information [Abstract]    
Entity Registrant Name CACI INTERNATIONAL INC /DE/  
Entity Central Index Key 0000016058  
Trading Symbol caci  
Current Fiscal Year End Date --06-30  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   24,162,793dei_EntityCommonStockSharesOutstanding
Document Type 10-Q  
Document Period End Date Dec. 31, 2014  
Amendment Flag false  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q2