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Deposits (Narrative) (Details) (USD $) In Billions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Time Deposits, $100,000 or More [Abstract]
Time deposits $100,000 and greater	$ 16.5	$ 19.8

- 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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