Consolidated Statement Of Condition (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statement Of Condition [Abstract]
Investment securities held to maturity, Fair Value	$ 9,362	$ 12,576
Loans and leases, allowance for losses	22	100
Premises and equipment, accumulated depreciation	$ 3,673	$ 3,425
Preferred stock, no par value
Preferred stock, shares authorized	3,500,000	3,500,000
Preferred stock, shares issued	5,001	5,001
Preferred stock, shares outstanding	5,001	5,001
Common stock, par	$ 1	$ 1
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	503,965,849	502,064,454
Treasury stock, shares	16,541,985	420,016