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Employee Benefits and Other Expenses, Expenses Not Otherwise Shown Separately In Financial Statement (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Expenses Not Otherwise Shown Separately In Financial Statement [Abstract]      
Outside professional services $ 2,692 $ 2,370 $ 1,982
Contract services 1,407 1,642 1,088
Foreclosed assets 1,354 1,537 1,071
Operating losses 1,261 1,258 875
Outside data processing 935 1,046 1,027
Postage, stationery and supplies 942 944 933
Insurance Expense $ 515 $ 464 $ 845