Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]
Founder's, other senior managing directors' and employees' investments	$ 1,000,000,000		$ 1,000,000,000
Founder's, other senior managing directors' and employees' share of the Net Income Attributable to Redeemable Non-Controlling Interests	44,900,000	50,500,000
Management and Advisory Fees, Net from Affiliates	74,000,000	39,400,000
Interest from loans to affiliates	100,000	1,000,000
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
Expected future payments under the tax receivable agreements in years	15 years
After-tax net present value estimated payments	$ 365,600,000
After-tax net present value discount rate assumption	15.00%