Consolidated Statement Of Condition (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Investment securities held to maturity, fair value	11,661	9,362
Loans and leases, allowance for losses	22	22
Premises and equipment, accumulated depreciation	4,037	3,673
Common stock, par value	1	1
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	503,900,268	503,965,849
Preferred stock, shares authorized	3,500,000	3,500,000
Treasury stock, shares	45,238,208	16,541,985
Series C Preferred Stock
Preferred stock, shares issued	5,000	5,000
Preferred stock, shares outstanding	5,000	5,000
Series A Preferred Stock
Preferred stock, shares issued	5,001	5,001
Preferred stock, shares outstanding	5,001	5,001