Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Assets
Federal funds sold and securities purchased under resale agreements, at fair value	$ 248,042,000,000	$ 222,554,000,000
Securities borrowed, at fair value	131,561,000,000	123,587,000,000
Other assets, at fair value	109,310,000,000	105,291,000,000
Liabilities
Deposits, at fair value	1,092,708,000,000	930,369,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements, at fair value	238,585,000,000	276,644,000,000
Other borrowed funds, at fair value	29,318,000,000	34,325,000,000
Beneficial interest liability, at fair value	65,971,000,000	77,649,000,000
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)	1,191,314	1,192,712
Treasury stock, shares (actual number)	306,053,359	194,639,785
Fair Value, Measurements, Recurring [Member] | Other assets | Fair value
Assets
Other assets, at fair value	16,131,000,000	18,201,000,000
Fair Value, Measurements, Recurring [Member] | Fair value
Assets
Federal funds sold and securities purchased under resale agreements, at fair value	22,192,000,000	20,299,000,000
Securities borrowed, at fair value	14,648,000,000	13,961,000,000
Available-for-sale securities	339,336,000,000	316,318,000,000
Loans, at fair value	1,997,000,000	1,976,000,000
Liabilities
Deposits, at fair value	4,816,000,000	4,369,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements, at fair value	7,011,000,000	4,060,000,000
Other borrowed funds, at fair value	9,381,000,000	9,931,000,000
Accounts Payable and Other Liabilities	68,000,000	236,000,000
Beneficial interest liability, at fair value	905,000,000	1,495,000,000
Long term debt borrowings, at fair value	35,865,000,000	38,839,000,000
Other assets
Assets
Assets pledged	1,483,000,000	1,485,000,000
Fair value
Liabilities
Allowance for lending-related commitments	686,000,000	717,000,000
Trading assets
Assets
Assets pledged	84,965,000,000	73,056,000,000
Securities
Assets
Assets pledged	$ 89,558,000,000	$ 86,891,000,000