Consolidated Statement Of Condition (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Investment securities held to maturity, Fair Value	$ 8,842	$ 9,362
Loans and leases, allowance for losses	22	22
Premises and equipment, accumulated depreciation	$ 3,814	$ 3,673
Preferred stock, no par value	$ 0	$ 0
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	503,940,523	503,965,849
Treasury stock, shares	14,249,472	16,541,985