Nature of Operations and Basis of Presentation (Policies)	3 Months Ended
Sep. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	CACI International Inc (collectively, with its consolidated subsidiaries, “CACI,” the “Company,” “we,” “us,” and “our”) is a leading provider of Technology and Expertise to customers in support of national security in the intelligence, defense, and federal civilian sectors, operating through two reportable segments: Domestic Operations and International Operations. The Company’s customers include agencies and departments of the U.S. government, various state and local government agencies, foreign governments, and commercial enterprises. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the U.S. (GAAP) and include the accounts of CACI and our majority owned subsidiaries. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s latest Annual Report on Form 10-K for the year ended June 30, 2026. Certain information and note disclosures normally included in the annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments and reclassifications (consisting of a normal, recurring nature) necessary for the fair presentation of the periods presented. The results of operations for the three months ended September 30, 2026 are not necessarily indicative of the results to be expected for any subsequent interim period or for the full fiscal year. All intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year presentation.
Recent Accounting Pronouncements	There have been no recently adopted or recently issued accounting pronouncements that are material or expected to be material to the Company’s consolidated financial statements.

Nature of Operations and Basis of Presentation (Policies)

3 Months Ended

Sep. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of Operations and Basis of Presentation

CACI International Inc (collectively, with its consolidated subsidiaries, “CACI,” the “Company,” “we,” “us,” and “our”) is a leading provider of Technology and Expertise to customers in support of national security in the intelligence, defense, and federal civilian sectors, operating through two reportable segments: Domestic Operations and International Operations. The Company’s customers include agencies and departments of the U.S. government, various state and local government agencies, foreign governments, and commercial enterprises.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the U.S. (GAAP) and include the accounts of CACI and our majority owned subsidiaries. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s latest Annual Report on Form 10-K for the year ended June 30, 2026.

Certain information and note disclosures normally included in the annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments and reclassifications (consisting of a normal, recurring nature) necessary for the fair presentation of the periods presented.

The results of operations for the three months ended September 30, 2026 are not necessarily indicative of the results to be expected for any subsequent interim period or for the full fiscal year. All intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year presentation.

Recent Accounting Pronouncements

There have been no recently adopted or recently issued accounting pronouncements that are material or expected to be material to the Company’s consolidated financial statements.