Contingencies, Commitments and Guarantees (Commitments and Guarantees - Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Contingencies, Commitments and Guarantees (Textuals) [Abstract]
Number of years over which commitments will be invested in partnerships	5 years
Commitments To Fund Partnership Investments	$ 4,400,000,000	$ 3,400,000,000
Minimum indemnities and guarantees contractual limitation	less than $1 million
Maximum indemnities and guarantees contractual limitation	800,000,000
Liabilities for indemnities, guarantees and commitments	5,000,000	5,000,000
Cumulative maximum indemnities and guarantees contractual limitiation	1,400,000,000
Commitments to Fund Bank Credit Facilities, Bridge Loans and Private Corporate Bond Investments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	925,000,000	1,200,000,000
Mortgage Loan Commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 3,400,000,000	$ 3,000,000,000