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Business Overview	12 Months Ended
Business Overview	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview	BUSINESS OVERVIEW Our Business Booz Allen Hamilton Holding Corporation, including its wholly owned subsidiaries, or the Company, we, us, and our, was incorporated in Delaware in May 2008. The Company provides management and technology consulting, analytics, engineering, digital solutions, mission operations, and cyber services to U.S. and international governments, major corporations, and not-for-profit organizations. The Company reports operating results and financial data in one reportable segment. The Company is headquartered in McLean, Virginia, with approximately 27,200 employees as of March 31, 2020.