v3.3.0.814
Summary of Status of Partnership's Unvested Equity-Based Awards (Detail)
9 Months Ended
Sep. 30, 2015
$ / shares
shares
Blackstone | Blackstone Partnership Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Balance | shares 33,498,237
Granted (Units) | shares 28,207,130
Vested (Units) | shares (19,681,411)
Forfeited (Units) | shares (934,536)
Ending Balance | shares 41,089,420
Beginning Balance $ 26.19
Granted (Weighted-Average Grant Date Fair Value) 38.76
Vested (Weighted-Average Grant Date Fair Value) 29.62
Forfeited (Weighted-Average Grant Date Fair Value) 23.49
Ending Balance 33.24
Blackstone Group L P | Equity Settled Awards Weighted Average Grant Date Fair Value  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Balance 16.95
Granted (Weighted-Average Grant Date Fair Value) 35.74
Vested (Weighted-Average Grant Date Fair Value) 17.93
Forfeited (Weighted-Average Grant Date Fair Value) 21.01
Exchanged 28.23
Ending Balance 22.88
Blackstone Group L P | Cash Settled Awards Weighted Average Grant Date Fair Value  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Balance 31.95
Granted (Weighted-Average Grant Date Fair Value) 35.31
Vested (Weighted-Average Grant Date Fair Value) 32.62
Exchanged 28.23
Ending Balance $ 32.53
Blackstone Group L P | Equity Settled Awards Deferred Restricted Common Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Balance | shares 17,569,372
Granted (Units) | shares 5,171,322
Vested (Units) | shares (7,536,719)
Forfeited (Units) | shares (228,735)
Exchanged | shares (10,374)
Ending Balance | shares 14,964,866
Blackstone Group L P | Cash Settled Awards Phantom Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Balance | shares 1,455
Granted (Units) | shares 16,312
Vested (Units) | shares (815)
Exchanged | shares 10,374
Ending Balance | shares 27,326