Cash Instruments (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Fair Value, Investments, Entities that Calculate Net Asset Value per Share [Abstract]
Fair Value of Investments	$ 16,896	$ 16,593
Fair value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	9,541	10,421
Fair Value, Investments Entities That Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period	10
Fair Value, Investments Entities That Calculate Net Asset Value Per Share, Investment Redemption Description	91
Fair Value, Investments Entities That Calculate Net Asset Value Per Share, Redemption Restriction, Description	0.25
Private Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value per Share [Abstract]
Fair Value of Investments	8,507	7,911
Fair value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	4,326	4,816
Private debt funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value per Share [Abstract]
Fair Value of Investments	3,884	4,267
Fair value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	3,406	3,721
Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value per Share [Abstract]
Fair Value of Investments	3,213	3,169
Fair value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	0	0
Real estate and other funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value per Share [Abstract]
Fair Value of Investments	1,292	1,246
Fair value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 1,809	$ 1,884

Fair Value, Investments, Entities that Calculate Net Asset Value per Share.

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- Definition

Notice period subject to which the firm's investments in hedge funds are generally redeemable on a quarterly basis.

+ Details

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- Definition

This element represents the remaining period (for example, years, months, days) for those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) that the entity can never redeem, but from which the entity receives distributions through the liquidation of the underlying assets by the investee.

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- Definition

General maximum redemption level at any quarter-end for the firm's investments in hedge funds.

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- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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- Definition

Fair Value of Investments in funds.

+ Details

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