Deposits (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Time Deposits, Fiscal Year Maturity [Abstract]
2013	$ 56,921,000,000
2014	11,119,000,000
2015	9,078,000,000
2016	6,418,000,000
2017	2,612,000,000
Thereafter	3,959,000,000
Total	90,107,000,000	99,600,000,000
Deposits (Textuals) [Abstract]
Time certificates of deposit and other time deposits issued by domestic and foreign offices	90,107,000,000	99,600,000,000
Amount of Foreign deposits with a denomination of $100,000 or more	11,700,000,000	13,600,000,000
Demand deposit overdrafts as loan balances	806,000,000	649,000,000
Domestic [Member]
Contractual Maturities, Time Deposits, $100,000 or More [Abstract]
Three months or less	3,460,000,000
After three months through six months	3,840,000,000
After six months through twelve months	5,582,000,000
After twelve months	10,821,000,000
Total	23,703,000,000	25,100,000,000
Deposits (Textuals) [Abstract]
Amount of domestic time deposits with a denomination of $100,000 or more	$ 23,703,000,000	$ 25,100,000,000

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The amount of contractual maturities of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more, after twelve months from the balance sheet date.

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Amount of deposits held by the entity that have been reclassified as loan balances receivable, for example, but not limited to, overdrafts receivable.

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

-Publisher AICPA

-Name Statement of Position (SOP)

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Amount of time deposits maturing after the fifth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of time deposits maturing in the fourth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of time deposits maturing in the next fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of time deposits maturing in the third fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of time deposits maturing in the second fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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

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

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