Commitments and Contingencies - Potential Future Reversal of Carried Interest Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	$ 4,903,541
Private Equity Funds VII [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	2,332,818
Private Equity Funds VI [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	1,394,342
Private Equity Funds V [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	90,440
Private Equity Funds IV [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	5,287
Private Equity Funds AAA/Other [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	219,781
Private Equity Funds
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	4,042,668
Capital Markets Funds U.S. Performing Credit [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	438,316
Capital Markets Funds Structured Credit [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	69,989
Capital Markets Funds European Credit Funds [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	79,361
Capital Markets Funds Non-Performing Loans [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	198,830
Capital Markets Funds Opportunistic Credit [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	59,505
Credit Funds
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	846,001
Real Estate Funds CPI Funds [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	3,947
Real Estate Funds AGRE U.S. [Member]
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	6,845
Real Estate
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	4,080
Real Estate
Gain Contingencies [Line Items]
Contingent obligations of potential future interest reversal of interest income	$ 14,872