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Commitments, Pledged Assets, and Collateral (Details 1) (USD $) In Billions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Collateral Received that Can be Resold or Repledged
Financial instruments pledged by the Firm that may not be sold or repledged by the secured parties	$ 283.0	$ 270.3
Assets accepted by the Firm as collateral that it could sell or repedge, deliver or otherwise use at fair value	769.9	742.1
Assets accepted by the Firm as collateral that the Firm has sold or repledged	$ 571.4	$ 515.8

Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty does not have the right to re-pledge such.

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