v2.4.0.6
Document and Entity Information (USD $)
6 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Oct. 31, 2011
Common stock, Class A
Oct. 31, 2011
Non-voting common stock, Class B
Oct. 31, 2011
Restricted common stock, Class C
Oct. 31, 2011
Special voting common stock, Class E
Entity Registrant Name Booz Allen Hamilton Holding Corp          
Entity Central Index Key 0001443646          
Document Type 10-Q          
Document Period End Date Sep. 30, 2011          
Amendment Flag false          
Document Fiscal Year Focus 2012          
Document Fiscal Period Focus Q2          
Current Fiscal Year End Date --03-31          
Entity Well-known Seasoned Issuer No          
Entity Voluntary Filers No          
Entity Current Reporting Status Yes          
Entity Filer Category Non-accelerated Filer          
Entity Public Float   $ 0        
Entity Common Stock, Shares Outstanding     127,556,598 2,704,310 1,696,670 10,140,067