CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Total CACI Shareholders’ Equity	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest
Beginning balance at Jun. 30, 2021	$ 2,665,278	$ 2,665,143	$ 4,268	$ 484,260	$ 3,189,087	$ (36,291)	$ (976,181)	$ 135
Beginning balance (in shares) at Jun. 30, 2021			42,676				19,122
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	366,794	366,794			366,794
Stock-based compensation expense	31,732	31,732		31,732
Tax withholdings on restricted share vestings	(14,869)	(14,869)	$ 14	(14,883)
Tax withholdings on restricted share vestings (in shares)			144
Other comprehensive income, net of tax	5,215	5,215				5,215
Repurchases of common stock	(9,785)	(9,785)		70,477			$ (80,262)
Repurchases of common stock (in shares)							318
Treasury stock issued under stock purchase plans	9,178	9,178		64			$ 9,114
Treasury stock issued under stock purchase plans (in shares)							(36)
Ending balance at Jun. 30, 2022	3,053,543	3,053,408	$ 4,282	571,650	3,555,881	(31,076)	$ (1,047,329)	135
Ending balance (in shares) at Jun. 30, 2022			42,820				19,404
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	384,735	384,735			384,735
Stock-based compensation expense	39,643	39,643		39,643
Tax withholdings on restricted share vestings	(14,399)	(14,399)	$ 10	(14,409)
Tax withholdings on restricted share vestings (in shares)			103
Other comprehensive income, net of tax	26,025	26,025				26,025
Repurchases of common stock	(275,176)	(275,176)		(50,614)			$ (224,562)
Repurchases of common stock (in shares)							759
Treasury stock issued under stock purchase plans	9,963	9,963		64			$ 9,899
Treasury stock issued under stock purchase plans (in shares)							(37)
Ending balance at Jun. 30, 2023	3,224,334	3,224,199	$ 4,292	546,334	3,940,616	(5,051)	$ (1,261,992)	135
Ending balance (in shares) at Jun. 30, 2023			42,923				20,126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	419,924	419,924			419,924
Stock-based compensation expense	53,904	53,904		53,904
Tax withholdings on restricted share vestings	(20,367)	(20,367)	$ 12	(20,379)
Tax withholdings on restricted share vestings (in shares)			119
Other comprehensive income, net of tax	(7,606)	(7,606)				(7,606)
Repurchases of common stock	(163,113)	(163,113)		50,951			$ (214,064)
Repurchases of common stock (in shares)							649
Treasury stock issued under stock purchase plans	11,131	11,131		381			$ 10,750
Treasury stock issued under stock purchase plans (in shares)							(35)
Ending balance at Jun. 30, 2024	$ 3,518,207	$ 3,518,072	$ 4,304	$ 631,191	$ 4,360,540	$ (12,657)	$ (1,465,306)	$ 135
Ending balance (in shares) at Jun. 30, 2024			43,042				20,740