Non-U.S. Activities (Summary Of Non-U.S. Assets) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Interest-bearing deposits with banks	$ 36,484	$ 22,234
Other assets	24,704	13,841
Total assets	208,795	160,505
Non-U.S. Assets [Member]
Interest-bearing deposits with banks	13,289	9,443
Non-U.S. investment securities	23,439	19,329
Other assets	24,717	13,994
Total assets	$ 61,445	$ 42,766