Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Assets
Federal funds sold and securities purchased under resale agreements, at fair value	$ 240,484,000,000	$ 235,314,000,000
Securities borrowed, at fair value	135,650,000,000	142,462,000,000
Other Assets	102,826,000,000	104,131,000,000
Liabilities
Deposits, at fair value	1,128,512,000,000	1,127,806,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements, at fair value	250,483,000,000	213,532,000,000
Other borrowed funds, at fair value	27,298,000,000	21,908,000,000
Beneficial interest liability, at fair value	67,750,000,000	65,977,000,000
Stockholders' equity
Preferred stock, par value (actual number)	$ 1.00	$ 1.00
Preferred stock, shares authorized (actual number)	200,000,000	200,000,000
Preferred stock, shares issued (actual number)	780,000	780,000
Common stock, par value (actual number)	$ 1.00	$ 1.00
Common stock, shares authorized (actual number)	9,000,000,000	9,000,000,000
Common stock, shares issued (actual number)	4,104,933,895	4,104,933,895
Shares held in RSU Trust, shares (actual number)	851,686	852,906
Treasury stock, shares (actual number)	(282,911,309)	(332,243,180)
Trading assets
Assets
Assets Pledged	106,594,000,000	89,856,000,000
Securities
Assets
Assets Pledged	92,498,000,000	94,691,000,000
Other assets
Assets
Assets Pledged	1,206,000,000	1,316,000,000
Fair Value, Measurements, Recurring [Member] | Fair value
Assets
Federal funds sold and securities purchased under resale agreements, at fair value	26,259,000,000	24,891,000,000
Securities borrowed, at fair value	12,519,000,000	15,308,000,000
Available-for-sale securities	381,731,000,000	364,781,000,000
Loans, at fair value	2,288,000,000	2,097,000,000
Liabilities
Deposits, at fair value	5,268,000,000	4,933,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements, at fair value	13,241,000,000	9,517,000,000
Other borrowed funds, at fair value	10,153,000,000	9,576,000,000
Accounts Payable and Other Accrued Liabilities	46,000,000	51,000,000
Beneficial interest liability, at fair value	1,001,000,000	1,250,000,000
Long term debt borrowings, at fair value	35,473,000,000	34,720,000,000
Fair Value, Measurements, Recurring [Member] | Other assets | Fair value
Assets
Other Assets	$ 17,121,000,000	$ 16,499,000,000