Commitments and Guarantees (Schedule Of Repurchase Agreements) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Aggregate fair value of indemnified securities financing	$ 340,239	$ 320,078
Aggregate fair value of cash and securities held by us, as agent, as collateral for indemnified securities financing	354,516	331,732
Aggregate fair value of collateral for indemnified securities financing invested in indemnified repurchase agreements	81,870	85,374
Aggregate fair value of cash and securities held by us or our agents as collateral for investments in indemnified repurchase agreements	$ 87,191	$ 91,097