Other Liabilities and Accrued Expenses (Details) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Other Liabilities and Accrued Expenses (Textuals) [Abstract]
Receivables related to reinsurance provided by the firm to other insurers	$ 1,350,000,000	$ 1,260,000,000
Receivables related to risks ceded to reinsurers	722,000,000	839,000,000
Liabilities for future benefits and unpaid claims at fair value	6,640,000,000	2,050,000,000
Noncontrolling interests related to consolidated investment funds	556,000,000	593,000,000
Acquired assets	4,750,000,000
Acquired liabilities	4,350,000,000
Other Liabilities
Compensation and benefits	6,354,000,000	9,089,000,000
Insurance-related liabilities	15,754,000,000	11,381,000,000
Noncontrolling interests	1,192,000,000	872,000,000
Income tax-related liabilities	478,000,000	2,042,000,000
Employee interests in consolidated funds	297,000,000	451,000,000
Subordinated liabilities issued by consolidated VIEs	1,376,000,000	1,526,000,000
Accrued expenses and other	4,458,000,000	4,650,000,000
Total	29,909,000,000	30,011,000,000
Insurance related liabilities
Separate account liabilities	3,867,000,000	4,024,000,000
Liabilities for future benefits and unpaid claims	10,863,000,000	6,308,000,000
Contract holder account balances	799,000,000	801,000,000
Reserves for guaranteed minimum death and income benefits	225,000,000	248,000,000
Total insurance-related liabilities	$ 15,754,000,000	$ 11,381,000,000