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Deposits (Details Textual) (USD $) In Billions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Deposits (Textual) [Abstract]
Time deposits of $100,000 or more	$ 1.6	$ 1.3

- Definition

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more.

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