CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements Of Operations [Abstract]
Revenue	$ 3,564,562	$ 3,681,990	$ 3,774,473
Costs of revenue:
Direct costs	2,426,520	2,535,606	2,598,890
Indirect costs and selling expenses	815,458	821,465	819,772
Depreciation and amortization	65,181	54,078	55,962
Total costs of revenue	3,307,159	3,411,149	3,474,624
Income from operations	257,403	270,841	299,849
Interest expense and other, net	38,158	25,818	24,101
Income before income taxes	219,245	245,023	275,748
Income taxes	83,326	92,347	107,537
Net income including portion attributable to noncontrolling interest in earnings of joint venture	135,919	152,676	168,211
Noncontrolling interest in earnings of joint venture	(603)	(987)	(757)
Net income attributable to CACI	$ 135,316	$ 151,689	$ 167,454
Basic earnings per share (in dollars per share)	$ 5.78	$ 6.59	$ 6.18
Diluted earnings per share (in dollars per share)	$ 5.38	$ 6.35	$ 5.96
Weighted-average basic shares outstanding (in shares)	23,429	23,010	27,077
Weighted-average diluted shares outstanding (in shares)	25,155	23,885	28,111