v2.4.0.8
Unvested Units, After Expected Forfeitures (Detail)
9 Months Ended
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Blackstone Holdings Partnership Units (Units) 31,290,689
Deferred Restricted Blackstone Common Units 15,465,322
Total Equity-Based Awards (Units) 46,756,011
Phantom Units (Units) 76,412
Blackstone Holdings Partnership Units (Weighted-Average Service Period in Years) 1 year 8 months 12 days
Deferred Restricted Blackstone Common Units 1 year 10 months 24 days
Total Equity-Based Awards (Weighted-Average Service Period in Years) 1 year 9 months 18 days
Phantom Units (Weighted-Average Service Period in Years) 15 days