Legal Proceedings and Other Commitments and Contingencies	12 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings and Other Commitments and Contingencies	Note 19 – Legal Proceedings and Other Commitments and Contingencies Legal Proceedings The Company is involved in various claims, lawsuits, and administrative proceedings arising in the normal course of business, none of which, based on current information, are expected to have a material adverse effect on the Company’s financial position, results of operations or cash flows. On November 12, 2024, a jury reached a $42 million judgment against the Company in an ongoing civil suit alleging that the Company’s employees had conspired with the U.S. military, which led to acts of wrongdoing committed by the U.S. military against the plaintiffs. On November 25, 2024, the Company filed a motion for dismissal as a matter of law, enumerating numerous grounds. On January 10, 2025, the motion was denied, and the Company filed a notice of appeal to the U.S. Court of Appeals. The Court of Appeals established a briefing schedule, which concluded on July 25, 2025. The Court of Appeals heard oral argument on September 9, 2025. On March 12, 2026, the Court of Appeals, in a 2-1 decision, affirmed the judgment of the district court against CACI. The Company filed a petition for rehearing or rehearing en banc and asked the Court of Appeals to stay action on that petition pending the Supreme Court’s expected decision in Cisco Systems, Inc. v. Doe, No. 24-856. On June 22, 2026, the Supreme Court issued its decision in the Cisco case. On June 23, 2026, CACI filed a notice with the Court of Appeals, apprising the Court of the Cisco decision, and requested that the Court reverse the district court’s judgment and remand with instructions to dismiss Plaintiff’s claims for lack of jurisdiction. On June 29, 2026, the Court of Appeals directed the parties to file supplemental briefs addressing their views on the effect of the Cisco decision, which were subsequently filed. The Company is vigorously defending the proceedings and continues to believe that the plaintiffs’ position is completely without merit. No amounts have been recognized in our consolidated financial statements. Government Contracting Payments to the Company on cost-plus-fee and time-and-materials contracts are subject to adjustment upon audit by the Defense Contract Audit Agency (DCAA) and other government agencies that do not utilize DCAA’s services. The DCAA has completed audits of the Company’s annual incurred cost proposals through fiscal 2024. The Company is still negotiating the results of prior years’ audits with the respective cognizant contracting officers and believes its reserves for such are adequate. Adjustments that may result from these audits and the audits not yet started are not expected to have a material effect on the Company’s financial position, results of operations, or cash flows. Additionally, the DCAA continually reviews the cost accounting and other practices of government contractors, including the Company. In the course of those reviews, cost accounting and other issues may be identified, discussed, and settled.

The Company is involved in various claims, lawsuits, and administrative proceedings arising in the normal course of business, none of which, based on current information, are expected to have a material adverse effect on the Company’s financial position, results of operations or cash flows.

On November 12, 2024, a jury reached a $42 million judgment against the Company in an ongoing civil suit alleging that the Company’s employees had conspired with the U.S. military, which led to acts of wrongdoing committed by the U.S. military against the plaintiffs. On November 25, 2024, the Company filed a motion for dismissal as a matter of law, enumerating numerous grounds. On January 10, 2025, the motion was denied, and the Company filed a notice of appeal to the U.S. Court of Appeals. The Court of Appeals established a briefing schedule, which concluded on July 25, 2025. The Court of Appeals heard oral argument on September 9, 2025. On March 12, 2026, the Court of Appeals, in a 2-1 decision, affirmed the judgment of the district court against CACI. The Company filed a petition for rehearing or rehearing en banc and asked the Court of Appeals to stay action on that petition pending the Supreme Court’s expected decision in Cisco Systems, Inc. v. Doe, No. 24-856. On June 22, 2026, the Supreme Court issued its decision in the Cisco case.

On June 23, 2026, CACI filed a notice with the Court of Appeals, apprising the Court of the Cisco decision, and requested that the Court reverse the district court’s judgment and remand with instructions to dismiss Plaintiff’s claims for lack of jurisdiction. On June 29, 2026, the Court of Appeals directed the parties to file supplemental briefs addressing their views on the effect of the Cisco decision, which were subsequently filed. The Company is vigorously defending the proceedings and continues to believe that the plaintiffs’ position is completely without merit. No amounts have been recognized in our consolidated financial statements.

Payments to the Company on cost-plus-fee and time-and-materials contracts are subject to adjustment upon audit by the Defense Contract Audit Agency (DCAA) and other government agencies that do not utilize DCAA’s services. The DCAA has completed audits of the Company’s annual incurred cost proposals through fiscal 2024. The Company is still negotiating the results of prior years’ audits with the respective cognizant contracting officers and believes its reserves for such are adequate. Adjustments that may result from these audits and the audits not yet started are not expected to have a material effect on the Company’s financial position, results of operations, or cash flows. Additionally, the DCAA continually reviews the cost accounting and other practices of government contractors, including the Company. In the course of those reviews, cost accounting and other issues may be identified, discussed, and settled.