Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit and Third-Party Guarantees As of December 31, 2022 and March 31, 2022, the Company was contingently liable under open standby letters of credit and bank guarantees issued by our banks in favor of third parties that totaled $6.1 million and $8.4 million, respectively. These letters of credit and bank guarantees primarily support insurance and bid and performance obligations. At both December 31, 2022 and March 31, 2022, approximately $1.0 million of these instruments reduced the available borrowings under the Revolving Credit Facility. The remainder is guaranteed under a separate $20.0 million facility of which $14.9 million and $12.6 million were available to the Company at December 31, 2022 and March 31, 2022, respectively. Government Contracting Matters - Provision for Claimed Indirect Costs For both the three months ended December 31, 2022 and 2021, approximately 97% of the Company's revenue was generated from contracts where the end user was an agency or department of the U.S. government, including contracts where the Company performed either as a prime contractor or subcontractor, and regardless of the geographic location in which the work was performed. For both the nine months ended December 31, 2022 and 2021, approximately 97% of the Company's revenue was generated from such contracts. As noted in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2022, in the ordinary course of business, agencies of the U.S. government, including the Defense Contract Audit Agency (DCAA), audit the Company’s claimed indirect 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 indirect costs for any audit, inquiry, or investigation of which it is aware that may be subject to any reductions and/or penalties. As of December 31, 2022 and March 31, 2022, the Company had recorded liabilities of approximately $311.6 million and $290.4 million, respectively, for estimated adjustments to claimed indirect costs based on its historical DCAA audit results, including the final resolution of such audits with the Defense Contract Management Agency, for claimed indirect costs incurred subsequent to fiscal 2011, and for contracts not yet closed that are subject to audit and final resolution. 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 clients 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. As of December 31, 2022 and March 31, 2022, there were no material amounts accrued in the condensed consolidated financial statements related to these proceedings. As previously disclosed in Note 20, “Commitments and Contingencies,” to the consolidated financial statements of the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2022, the Company is not able to reasonably estimate the expected amount or range of cost or any loss associated with these matters. On June 7, 2017, Booz Allen Hamilton was informed that the U.S. Department of Justice (“DOJ”) is conducting a civil and criminal investigation of the Company. In connection with the investigation, the DOJ has requested information from the Company relating to certain elements of the Company’s cost accounting and indirect cost charging practices with the U.S. government. Since learning of the investigation, the Company has engaged a law firm experienced in these matters to represent the Company in connection with this matter and respond to the government's requests. As is commonly the case with this type of matter, the Company has also been in contact with other regulatory agencies and bodies, including the SEC, which notified the Company that it is conducting an investigation that the Company believes relates to the matters that are also the subject of the DOJ's investigation. The Company may receive additional regulatory or governmental inquiries related to the matters that are the subject of the DOJ's investigation. On May 12, 2021, the Company was informed that the DOJ has closed its criminal investigation. In accordance with the Company's practice, the Company continues to cooperate with all relevant government parties and believes that it has meritorious defenses to the concerns raised by the DOJ. In order to explore whether a negotiated resolution is possible, the Company has entered into settlement discussions with the DOJ. In connection with these settlement discussions, the Company recorded a $124.0 million reserve in the third quarter of fiscal 2023 as a component of general and administrative expenses in our condensed consolidated statements of operations, which we believe represents the low end of our range of probable loss. There can be no assurance that any settlement will be achieved and, if a settlement is achieved, what the total dollar amount will be of any such settlement. Accordingly, at this time the Company is not able to reasonably estimate the possible range of cost or any loss in excess of the reserve associated with these matters. Changes in the reserve may be required in future periods as discussions with the DOJ continue and additional information becomes available. The total cost associated with these matters will depend on many factors, including the duration of these matters and any related findings. Any settlement that is achieved or any adverse outcome in any litigation that is brought could have a material adverse impact on our financial condition and results of operations.