v2.4.0.8
Document and Entity Information (USD $)
12 Months Ended
Mar. 31, 2014
Sep. 30, 2013
May 16, 2014
Common stock, Class A
May 16, 2014
Non-voting common stock, Class B
May 16, 2014
Restricted common stock, Class C
May 16, 2014
Special voting common stock, Class E
Entity Information [Line Items]            
Entity Registrant Name Booz Allen Hamilton Holding Corp          
Entity Central Index Key 0001443646          
Document Type 10-K          
Document Period End Date Mar. 31, 2014          
Amendment Flag false          
Document Fiscal Year Focus 2014          
Document Fiscal Period Focus Q4          
Current Fiscal Year End Date --03-31          
Entity Filer Category Large Accelerated Filer          
Entity Well-known Seasoned Issuer No          
Entity Voluntary Filers No          
Entity Current Reporting Status Yes          
Entity Public Float   $ 830,267,765        
Entity Common Stock, Shares Outstanding     143,446,817 525,370 914,101 4,424,814