Loans and Commitments to Extend Credit (Narrative) (Details) (USD $) In Billions	Sep. 30, 2011	Dec. 31, 2010
Total syndications, assignments and participations	$ 19.7	$ 16.7
Federal Reserve Bank [Member]
Loans pledged as collateral for contingent borrowings	20.2	12.6
Federal Home Loan Bank [Member]
Loans pledged as collateral for contingent borrowings	$ 27.9	$ 32.4

- Definition

The sum of the carrying amounts, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and for which the transferees are not permitted to sell or re-pledge them to an unrelated party.

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