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, 2020	$ 2,661,310	$ 2,661,175	$ 4,253	$ 573,744	$ 2,731,644	$ (72,285)	$ (576,181)	$ 135
Beginning balance (in shares) at Jun. 30, 2020			42,525				17,432
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	457,443	457,443			457,443
Stock-based compensation expense	30,463	30,463		30,463
Tax withholdings on restricted share vestings	(19,719)	(19,719)	$ 15	(19,734)
Tax withholdings on restricted share vestings (in shares)			151
Other comprehensive income, net of tax	35,994	35,994				35,994
Repurchases of common stock	(509,137)	(509,137)		(100,232)			$ (408,905)
Repurchases of common stock (in shares)							1,731
Treasury stock issued under stock purchase plans	8,924	8,924		19			$ 8,905
Treasury stock issued under stock purchase plans (in shares)							(41)
Ending balance at Jun. 30, 2021	2,665,278	2,665,143	$ 4,268	484,260	3,189,087	(36,291)	$ (976,181)	135
Ending 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