Investments (Details) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	$ 248,180,000,000	$ 223,240,000,000
Available-for-sale Securities, Gross Unrealized Gains	19,514,000,000	14,782,000,000
Available-for-sale Securities, Gross Unrealized Losses	(4,656,000,000)	(5,139,000,000)
Available for Sale Securities, fair value	263,038,000,000	232,883,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	(649,000,000)	(761,000,000)
Other details of available-for-sale securities
Available for sale securities at fair value from businesses held for sale		80,500,000,000
Fair value of collateral received from counterparties under secured financing transactions	1,200,000,000
U.S. government and government sponsored entities \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	7,123,000,000	7,239,000,000
Available-for-sale Securities, Gross Unrealized Gains	434,000,000	184,000,000
Available-for-sale Securities, Gross Unrealized Losses	(3,000,000)	(73,000,000)
Available for Sale Securities, fair value	7,554,000,000	7,350,000,000
Obligations of states, municipalities and Political subdivisions \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	36,921,000,000	45,297,000,000
Available-for-sale Securities, Gross Unrealized Gains	2,558,000,000	1,725,000,000
Available-for-sale Securities, Gross Unrealized Losses	(89,000,000)	(402,000,000)
Available for Sale Securities, fair value	39,390,000,000	46,620,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	(29,000,000)	2,000,000
Non-U.S. government \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	18,969,000,000	14,780,000,000
Available-for-sale Securities, Gross Unrealized Gains	761,000,000	639,000,000
Available-for-sale Securities, Gross Unrealized Losses	(76,000,000)	(75,000,000)
Available for Sale Securities, fair value	19,654,000,000	15,344,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI		(28,000,000)
Corporate debt \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	136,018,000,000	118,729,000,000
Available-for-sale Securities, Gross Unrealized Gains	11,811,000,000	8,827,000,000
Available-for-sale Securities, Gross Unrealized Losses	(1,563,000,000)	(1,198,000,000)
Available for Sale Securities, fair value	146,266,000,000	126,358,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	94,000,000	99,000,000
Residential Mortgage Backed Securities (RMBS) \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	32,448,000,000	20,661,000,000
Available-for-sale Securities, Gross Unrealized Gains	1,507,000,000	700,000,000
Available-for-sale Securities, Gross Unrealized Losses	(1,397,000,000)	(1,553,000,000)
Available for Sale Securities, fair value	32,558,000,000	19,808,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	(625,000,000)	(648,000,000)
Commercial mortgage-backed securities (CMBS) \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	8,168,000,000	7,320,000,000
Available-for-sale Securities, Gross Unrealized Gains	458,000,000	240,000,000
Available-for-sale Securities, Gross Unrealized Losses	(986,000,000)	(1,149,000,000)
Available for Sale Securities, fair value	7,640,000,000	6,411,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	(143,000,000)	(218,000,000)
Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) \| Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	6,743,000,000	6,643,000,000
Available-for-sale Securities, Gross Unrealized Gains	498,000,000	402,000,000
Available-for-sale Securities, Gross Unrealized Losses	(474,000,000)	(634,000,000)
Available for Sale Securities, fair value	6,767,000,000	6,411,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	54,000,000	32,000,000
Bonds available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	246,390,000,000	220,669,000,000
Available-for-sale Securities, Gross Unrealized Gains	18,027,000,000	12,717,000,000
Available-for-sale Securities, Gross Unrealized Losses	(4,588,000,000)	(5,084,000,000)
Available for Sale Securities, fair value	259,829,000,000	228,302,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	(649,000,000)	(761,000,000)
Other details of available-for-sale securities
Available for sale securities not rated or rated below investment grade	20,900,000,000	18,600,000,000
Bonds available for sale \| Mortgage backed, asset backed and collateralized
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	47,359,000,000	34,624,000,000
Available-for-sale Securities, Gross Unrealized Gains	2,463,000,000	1,342,000,000
Available-for-sale Securities, Gross Unrealized Losses	(2,857,000,000)	(3,336,000,000)
Available for Sale Securities, fair value	46,965,000,000	32,630,000,000
Available-for-sale Securities, Other-Than- Temporary Impairments in AOCI	(714,000,000)	(834,000,000)
Common Stock \| Equity securities available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	1,652,000,000	1,820,000,000
Available-for-sale Securities, Gross Unrealized Gains	1,444,000,000	1,931,000,000
Available-for-sale Securities, Gross Unrealized Losses	(68,000,000)	(52,000,000)
Available for Sale Securities, fair value	3,028,000,000	3,699,000,000
Preferred Stock. \| Equity securities available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	83,000,000	400,000,000
Available-for-sale Securities, Gross Unrealized Gains	31,000,000	88,000,000
Available-for-sale Securities, Gross Unrealized Losses		(1,000,000)
Available for Sale Securities, fair value	114,000,000	487,000,000
Mutual Funds \| Equity securities available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	55,000,000	351,000,000
Available-for-sale Securities, Gross Unrealized Gains	12,000,000	46,000,000
Available-for-sale Securities, Gross Unrealized Losses		(2,000,000)
Available for Sale Securities, fair value	67,000,000	395,000,000
Equity securities available for sale
Schedule of Gross Unrealized Gains and Losses on Available For Sale Securities
Available-for-sale Securities, Amortized Cost or Cost	1,790,000,000	2,571,000,000
Available-for-sale Securities, Gross Unrealized Gains	1,487,000,000	2,065,000,000
Available-for-sale Securities, Gross Unrealized Losses	(68,000,000)	(55,000,000)
Available for Sale Securities, fair value	$ 3,209,000,000	$ 4,581,000,000

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The amount of Available-for-sale Securities that are below investment grade or not rated.

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The amount of other-than-temporary impairment losses in Accumulated other comprehensive loss (AOCI), which are not recognized in earnings. Amount includes unrealized gains and losses on impaired securities relating to changes in the value of such securities subsequent to the impairment measurement date.

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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.

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The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability.

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