Fair Values of Assets and Liabilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Values of Assets and Liabilities [Abstract]
Fair value of client securities pledged in securities lending transactions to other broker-dealers	$ 1,200	$ 852
Fair value of borrowed securities from other broker-dealers to fulfill short sales by clients	$ 115	$ 121

Amount, after the effects of master netting arrangements, of securities borrowed from entities in exchange for collateral. Includes assets not subject to a master netting arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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