v3.3.0.814

Unvested Units, After Expected Forfeitures (Detail) | 9 Months Ended
--- | ---
Sep. 30, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Blackstone Holdings Partnership Units (Units) | 33,291,174
Deferred Restricted Blackstone Common Units | 12,633,401
Total Equity-Based Awards (Units) | 45,924,575
Phantom Units (Units) | 18,457
Blackstone Holdings Partnership Units (Weighted-Average Service Period in Years) | 4 years 7 months 6 days
Deferred Restricted Blackstone Common Units | 2 years 1 month 6 days
Total Equity-Based Awards (Weighted-Average Service Period in Years) | 3 years 10 months 24 days
Phantom Units (Weighted-Average Service Period in Years) | 4 years

X
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