Other Liabilities and Accrued Expenses (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Other Liabilities and Accrued Expenses (Textuals) [Abstract]
Noncontrolling interests related to consolidated investment funds	$ 338,000,000	$ 419,000,000
Liabilities related to the Americas reinsurance business included within Accrued expenses and other		14,620,000,000
Liabilities related to the European insurance business included within Accrued expenses and other	10,620,000,000
Other Liabilities
Compensation and benefits	6,857,000,000	8,292,000,000
Insurance-related liabilities	0	10,274,000,000
Noncontrolling interests	341,000,000	508,000,000
Income tax-related liabilities	2,865,000,000	2,724,000,000
Employee interests in consolidated funds	246,000,000	246,000,000
Subordinated liabilities issued by consolidated VIEs	894,000,000	1,360,000,000
Accrued expenses and other	15,104,000,000	18,991,000,000
Total	$ 26,307,000,000	$ 42,395,000,000