Unvested Units, After Expected Forfeitures (Detail)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Blackstone Holdings Partnership Units (Units)	44,277,748
Deferred Restricted Blackstone Common Units and Options (Units)	16,515,381
Total Equity-Based Awards (Units)	60,793,129
Phantom Units (Units)	146,520
Blackstone Holdings Partnership Units (Weighted-Average Service Period in Years)	1 year 10 months 24 days
Deferred Restricted Blackstone Common Units and Options (Weighted-Average Service Period in Years)	2 years 3 months 18 days
Total Equity-Based Awards (Weighted-Average Service Period in Years)	2 years
Phantom Units (Weighted-Average Service Period in Years)	11 days