v2.4.0.6
RELATED PARTY TRANSACTIONS - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Year
Jun. 30, 2011
Jun. 30, 2012
Year
Jun. 30, 2011
Dec. 31, 2011
Related Party Transaction [Line Items]          
Founder's, other senior managing directors' and employees' investments $ 782,300,000   $ 782,300,000   $ 715,500,000
Founder's, other senior managing directors' and employees' share of the Net Income Attributable to Redeemable Non-Controlling Interests 9,900,000 61,100,000 43,300,000 131,900,000  
Management and Advisory Fees earned from affiliates 56,133,000 118,916,000 104,117,000 188,954,000  
Interest from loans to affiliates 1,000,000 600,000 2,300,000 1,300,000  
Partnership Unit to Blackstone Common Unit ratio     1    
Cash saving in tax receivable agreements, percentage     85.00%    
Expected future payments under the tax receivable agreements 1,200,000,000   1,200,000,000    
Expected future payments under the tax receivable agreements in years 15   15    
After-tax net present value estimated payments $ 357,900,000   $ 357,900,000    
After-tax net present value discount rate assumption 15.00%   15.00%