Other Assets (Components Of Other Assets) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Income taxes receivable	$ 1,933		$ 1,822
Total	16,505		17,139
Other [Member]
Real estate acquired through foreclosure	76		75
Reported Amount [Member] | Other [Member]
Collateral deposits, net	8,020		6,688
Unrealized gains on derivative financial instruments, net	3,435		6,366
Accounts receivable	1,406		431
Investments in joint ventures and other unconsolidated entities	1,203		1,060
Receivable For securities settlement	525		20
Deferred tax assets, net of valuation allowance	379		395
Prepaid expenses	374		308
Deposits with clearing organizations	196		222
Receivable For securities sold	151		11
Non-cash collateral deposits	49		110
Income taxes receivable	28		989
Other	$ 739	[1]	$ 539	[1]

[1] Included other real estate owned of approximately $76 million and $75 million, respectively.