Commitments and Contingencies	3 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Government Contracting Matters - Provision for Claimed Costs U.S. government contracts and subcontracts are subject to extensive legal and regulatory requirements. From time to time and in the ordinary course of business, agencies of the U.S. government, including the Defense Contract Audit Agency (“DCAA”), audit the Company’s claimed costs and conduct inquiries and investigations of our business practices with respect to government contracts to determine whether the Company's operations are conducted in accordance with these requirements and the terms of the relevant contracts. Management believes it has recorded the appropriate provision for claimed costs for any audit, inquiry, or investigation of which it is aware that may be subject to any reductions and/or penalties. As of June 30, 2026 and March 31, 2026, the Company had recorded liabilities (included in accounts payable and other accrued expenses) of approximately $248 million for estimated adjustments to claimed costs based on its historical DCAA audit results, including the final resolution of such audits with the Defense Contract Management Agency (“DCMA”), for claimed costs incurred subsequent to fiscal 2011. Leases On November 12, 2025, the Company entered into two separate 15-year lease agreements for two corporate office spaces in Reston, Virginia. The Company plans to relocate its headquarters to these office spaces in the fall of 2027, dependent upon the timing of the completion of various tenant improvements. Under these lease agreements, which were entered into by Booz Allen Hamilton and are guaranteed by the Company, the estimated total undiscounted base lease payments are $240 million and the agreements provide for up to $61 million in tenant improvement allowances as of June 30, 2026. For the quarter ended June 30, 2026, the total lease liabilities arising from obtaining right-of-use assets were $51 million. Litigation Our performance under U.S. government contracts and compliance with the terms of those contracts and applicable laws and regulations are subject to continuous audit, review, and investigation by the U.S. government, which may include such investigative techniques as subpoenas or civil investigative demands. Given the nature of our business, these audits, reviews, and investigations may focus, among other areas, on various aspects of procurement integrity, labor time reporting, sensitive and/or classified information access and control, executive compensation, and post-government employment restrictions. We are not always aware of our status in such matters, but we are currently aware of certain pending audits and investigations involving labor time reporting, procurement integrity, and classified information access. In addition, from time to time, we are also involved in legal proceedings and investigations arising in the ordinary course of business, including those relating to employment matters, relationships with customers and contractors, intellectual property disputes, and other business matters. These legal proceedings seek various remedies, including claims for monetary damages in varying amounts, none of which are considered material, or are unspecified as to amount. Although the outcome of any such matter is inherently uncertain and may be materially adverse, based on current information, we do not expect any of the currently ongoing audits, reviews, investigations, or litigation to have a material adverse effect on our financial condition and results of operations.

U.S. government contracts and subcontracts are subject to extensive legal and regulatory requirements. From time to time and in the ordinary course of business, agencies of the U.S. government, including the Defense Contract Audit Agency (“DCAA”), audit the Company’s claimed costs and conduct inquiries and investigations of our business practices with respect to government contracts to determine whether the Company's operations are conducted in accordance with these requirements and the terms of the relevant contracts.

Management believes it has recorded the appropriate provision for claimed costs for any audit, inquiry, or investigation of which it is aware that may be subject to any reductions and/or penalties. As of June 30, 2026 and March 31, 2026, the Company had recorded liabilities (included in accounts payable and other accrued expenses) of approximately $248 million for estimated adjustments to claimed costs based on its historical DCAA audit results, including the final resolution of such audits with the Defense Contract Management Agency (“DCMA”), for claimed costs incurred subsequent to fiscal 2011.

On November 12, 2025, the Company entered into two separate 15-year lease agreements for two corporate office spaces in Reston, Virginia. The Company plans to relocate its headquarters to these office spaces in the fall of 2027, dependent upon the timing of the completion of various tenant improvements. Under these lease agreements, which were entered into by Booz Allen Hamilton and are guaranteed by the Company, the estimated total undiscounted base lease payments are $240 million and the agreements provide for up to $61 million in tenant improvement allowances as of June 30, 2026. For the quarter ended June 30, 2026, the total lease liabilities arising from obtaining right-of-use assets were $51 million.

Our performance under U.S. government contracts and compliance with the terms of those contracts and applicable laws and regulations are subject to continuous audit, review, and investigation by the U.S. government, which may include such investigative techniques as subpoenas or civil investigative demands. Given the nature of our business, these audits, reviews, and investigations may focus, among other areas, on various aspects of procurement integrity, labor time reporting, sensitive and/or classified information access and control, executive compensation, and post-government employment restrictions. We are not always aware of our status in such matters, but we are currently aware of certain pending audits and investigations involving labor time reporting, procurement integrity, and classified information access. In addition, from time to time, we are also involved in legal proceedings and investigations arising in the ordinary course of business, including those relating to employment matters, relationships with customers and contractors, intellectual property disputes, and other business matters. These legal proceedings seek various remedies, including claims for monetary damages in varying amounts, none of which are considered material, or are unspecified as to amount. Although the outcome of any such matter is inherently uncertain and may be materially adverse, based on current information, we do not expect any of the currently ongoing audits, reviews, investigations, or litigation to have a material adverse effect on our financial condition and results of operations.