Fair Value Measurement - Level 3 Analysis (Details 4) (USD $)	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended						9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended																																										9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011 Level 3 [Member] Derivative Receivables Net Of Payables [ Member]	Sep. 30, 2011 Level 3 [Member] Derivative Receivables Net Of Payables [ Member]	Sep. 30, 2011 Derivative Receivables Net Of Payables [ Member]	Sep. 30, 2010 Derivative Receivables Net Of Payables [ Member]	Sep. 30, 2011 Derivative Receivables Net Of Payables [ Member]	Sep. 30, 2010 Derivative Receivables Net Of Payables [ Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Debt and Equity Instruments [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Debt and Equity Instruments [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Debt and Equity Instruments [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Debt and Equity Instruments [Member]	Sep. 30, 2011 Level 3 [Member] Debt and Equity Instruments [Member]	Sep. 30, 2011 Debt and Equity Instruments [Member]	Sep. 30, 2010 Debt and Equity Instruments [Member]	Sep. 30, 2011 Debt and Equity Instruments [Member]	Sep. 30, 2010 Debt and Equity Instruments [Member]	Sep. 30, 2011 Level 3 [Member] Servicing Contracts [Member]	Sep. 30, 2011 Level 3 [Member] Servicing Contracts [Member]	Sep. 30, 2011 Servicing Contracts [Member]	Sep. 30, 2010 Servicing Contracts [Member]	Sep. 30, 2011 Servicing Contracts [Member]	Sep. 30, 2010 Servicing Contracts [Member]	Sep. 30, 2011 Level 3 [Member] Private Equity Funds [Member]	Sep. 30, 2011 Level 3 [Member] Private Equity Funds [Member]	Sep. 30, 2011 Private Equity Funds [Member]	Sep. 30, 2010 Private Equity Funds [Member]	Sep. 30, 2011 Private Equity Funds [Member]	Sep. 30, 2010 Private Equity Funds [Member]	Sep. 30, 2011 Long-term Debt [Member]	Sep. 30, 2010 Long-term Debt [Member]	Sep. 30, 2011 Long-term Debt [Member]	Sep. 30, 2010 Long-term Debt [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Collateralized Loan Obligations [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Collateralized Loan Obligations [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Collateralized Loan Obligations [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Collateralized Loan Obligations [Member]	Sep. 30, 2011 Collateralized Loan Obligations [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Loans Receivable [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Loans Receivable [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Reverse Mortgage [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Derivatives including: interest rate, credit, foreign exchange, equity and commodity contracts	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Derivatives including: interest rate, credit, foreign exchange, equity and commodity contracts	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Interest Rate Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Interest Rate Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Structured Credit Derivatives [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Credit Default Swap [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Credit derivatives	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Credit derivatives	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Foreign Exchange Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Foreign Exchange Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Equity Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Equity Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Commodity Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Commodity Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Loans Receivable [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Loans Receivable [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Derivatives including: interest rate, credit, foreign exchange, equity and commodity contracts	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Derivatives including: interest rate, credit, foreign exchange, equity and commodity contracts	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Interest Rate Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Interest Rate Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Credit derivatives	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Credit derivatives	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Foreign Exchange Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Foreign Exchange Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Equity Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Equity Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Commodity Contract [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Commodity Contract [Member]	Sep. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] Level 3 [Member] Loans Held-For-Sale [Member]	Dec. 31, 2010 Reverse Mortgage [Member]	Sep. 30, 2011 Level 3 [Member] Residential and Commercial Mortgage Loans [Member]	Sep. 30, 2011 Level 3 [Member] Asset backed Security Available for Sale [Member]	Sep. 30, 2011 Level 3 [Member] Asset backed Security Available for Sale [Member]	Sep. 30, 2011 Level 3 [Member]
Level 3 Analysis - Supplemental Data [Abstract]
Available-for-sale securities																																	$ 21,317,000,000	$ 13,470,000,000	$ 21,433,000,000	$ 13,598,000,000				$ 22,069,000,000	$ 14,287,000,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Credit Enhancement Percentage																																					30.00%
Trading assets								31,779,000,000	34,554,000,000	352,678,000,000	409,411,000,000																						6,600,000,000					461,531,000,000	489,892,000,000	71,467,000,000	69,196,000,000	11,584,000,000	13,144,000,000	4,000,000,000	39,688,000,000	34,642,000,000	6,791,000,000	5,422,000,000	14,900,000,000	3,500,000,000	20,173,000,000	17,902,000,000	4,542,000,000	4,236,000,000	4,155,000,000	4,885,000,000	4,027,000,000	2,197,000,000	33,736,000,000	34,880,000,000	108,853,000,000	80,481,000,000	50,648,000,000	32,555,000,000	7,033,000,000	7,725,000,000	25,887,000,000	25,858,000,000	8,504,000,000	4,204,000,000	16,781,000,000	10,139,000,000		4,000,000,000	5,500,000,000
Percentage of level 3 assets in total Firm assets	5.00%
Fair value of assets																																	27,900,000,000																																													115,000,000,000
Increase (decrease) in level 3 assets	5,200,000,000	5,500,000,000	5,000,000,000									(2,800,000,000)					(4,400,000,000)	(5,800,000,000)					(1,400,000,000)	(1,300,000,000)																																																	(2,700,000,000)			6,200,000,000	7,800,000,000	351,000,000
Gains (losses) on level 3 assets				4,911,000,000	(1,129,000,000)	6,114,000,000	80,000,000						(408,000,000)	1,346,000,000	1,074,000,000	873,000,000			(4,575,000,000)	(1,497,000,000)	(6,286,000,000)	(5,177,000,000)			(469,000,000)	827,000,000	1,213,000,000	963,000,000
Gains related to long-term structured note liabilities																													$ (131,000,000)	$ 784,000,000	$ 326,000,000	$ 251,000,000

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.