NON-CONTROLLING REDEEMABLE INTERESTS IN CONSOLIDATED FUNDS - Summary of Changes in Non-controlling Redeemable Interests in Consolidated Funds (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Non-Controlling Redeemable Interests in Consolidated Funds [Roll Forward]
Beginning balance	$ 39,670,831	$ 41,048,607
Contributions	1,614,894	1,257,508
Distributions	(3,256,759)	(2,968,352)
Net income	2,063,965	2,124,772
Change in distributions payable	105,089	181,706
Change in deferred contributions	0	41,000
Foreign currency translation and other	(97,875)	75,923
Ending balance	$ 40,100,145	$ 41,761,164

Carrying amount, attributable to noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

No definition available.

Name:	us-gaap_TemporaryEquityCarryingAmountAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant