CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total CACI Shareholders' Equity	Noncontrolling Interest
Beginning balance at Jun. 30, 2021	$ 2,665,278	$ 4,268	$ 484,260	$ 3,189,087	$ (36,291)	$ (976,181)	$ 2,665,143	$ 135
Beginning balance, shares at Jun. 30, 2021		42,676				19,122
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	88,109			88,109			88,109
Stock-based compensation expense	6,669		6,669				6,669
Tax withholdings on restricted share vestings	(273)	$ 3	(276)				(273)
Tax withholdings on restricted share vestings (in shares)		34
Other comprehensive loss, net of tax	(4,548)				(4,548)		(4,548)
Repurchases of common stock	(2,472)		70,974			$ (73,446)	(2,472)
Repurchases of common stock (in shares)						292
Treasury stock issued under stock purchase plans	2,359		61			$ 2,298	2,359
Treasury stock issued under stock purchase plans (in shares)						(10)
Ending balance at Sep. 30, 2021	2,755,122	$ 4,271	561,688	3,277,196	(40,839)	$ (1,047,329)	2,754,987	135
Ending balance, shares at Sep. 30, 2021		42,710				19,404
Beginning balance at Jun. 30, 2022	3,053,543	$ 4,282	571,650	3,555,881	(31,076)	$ (1,047,329)	3,053,408	135
Beginning balance, shares at Jun. 30, 2022		42,820				19,404
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	89,125			89,125			89,125
Stock-based compensation expense	8,439		8,439				8,439
Tax withholdings on restricted share vestings	(435)	$ 1	(436)				(435)
Tax withholdings on restricted share vestings (in shares)		6
Other comprehensive loss, net of tax	(1,960)				(1,960)		(1,960)
Repurchases of common stock	(2,647)		(182)			$ (2,465)	(2,647)
Repurchases of common stock (in shares)						9
Treasury stock issued under stock purchase plans	2,505		40			$ 2,465	2,505
Treasury stock issued under stock purchase plans (in shares)						(9)
Ending balance at Sep. 30, 2022	$ 3,148,570	$ 4,283	$ 579,511	$ 3,645,006	$ (33,036)	$ (1,047,329)	$ 3,148,435	$ 135
Ending balance, shares at Sep. 30, 2022		42,826				19,404