Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Commitments And Contingencies [Line Items]
Rent expense	$ 78,600,000	$ 74,800,000	$ 72,700,000
Leases	9,000,000	9,400,000
General partner capital funding	1,500,000,000
Total investments at risk in respect of guarantees extended	4,900,000
Loans held By employees for investment guaranteed	60,300,000
Contingent obligations currently anticipated to expire end	2018
Cash clawback obligation	89,700,000
Provision for cash clawback	420,900,000
Blackstone Holdings Finance Co. L.L.C.
Schedule Of Commitments And Contingencies [Line Items]
Cash clawback obligation	70,600,000
Current And Former Blackstone Personnel
Schedule Of Commitments And Contingencies [Line Items]
Cash clawback obligation	19,100,000
Blackstone Funds
Schedule Of Commitments And Contingencies [Line Items]
Funds signed investment commitments	54,600,000
Blackstone Funds \| Portfolio Company Acquisition
Schedule Of Commitments And Contingencies [Line Items]
Signed investment commitments for portfolio company acquisitions in process of closing	$ 25,200,000
Maximum
Schedule Of Commitments And Contingencies [Line Items]
Operating lease expiration year	2032