Non-U.S. Activities (Summary Of Non-U.S. Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Interest-bearing deposits with banks	$ 64,257	$ 50,763
Other assets	25,990	18,016
Total assets	243,291	222,582
Non-U.S. Assets
Segment Reporting Information [Line Items]
Interest-bearing deposits with banks	9,584	20,665
Investment securities	31,522	28,976
Other assets	16,778	13,441
Total assets	$ 57,884	$ 63,082