Other Assets (Components Of Other Assets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Income taxes receivable	$ 1,914		$ 1,822
Total	16,710		17,139
Other [Member]
Real Estate Acquired Through Foreclosure	76		75
Reported Amount [Member] | Other [Member]
Collateral deposits, net	8,743		6,688
Unrealized gains on derivative financial instruments, net	4,175		6,366
Investments in joint ventures and other unconsolidated entities	1,199		1,060
Accounts receivable	415		431
Deferred tax assets, net of valuation allowance	408		395
Prepaid expenses	319		308
Receivable For Security Settlement	245		20
Deposits with clearing organizations	127		222
Non-cash collateral deposits	99		110
Income taxes receivable	45		989
Other	$ 935	[1]	$ 550	[1]

[1] Amounts for June 30, 2012 and December 31, 2011 included other real estate owned of approximately $76 million and $75 million, respectively.