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Fair Value Measurement and Election - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Mar. 31, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
Proceeds from sale of retained interest   $ 20        
Gains recognized from redemptions of ARS 5   (2) 35 6  
LHFI at fair value 449     449   492
Incremental charge-off 563   768 1,178 1,630  
Loans sold at carrying value 277     277    
Loans returned to LHFI       46 17  
Structured Investment Vehicle | Collateralized Debt Obligations
           
Proceeds from sale of trading assets   21        
Asset-backed Securities | Auto Loans | Home Equity Lines Of Credit
           
Transferred out of level 3 in the fair value hierarchy   31        
Asset-backed Securities | Available-for-Sale Securities | Fair Value, Inputs, Level 2
           
Transferred out of level 3 in the fair value hierarchy       74    
Asset-backed Securities | Student Loans
           
Government guarantee 97.00%     97.00%    
Asset-backed Securities | Trading Assets | Fair Value, Inputs, Level 2
           
Transferred out of level 3 in the fair value hierarchy       32    
Equity Securities | Fair Value, Inputs, Level 2
           
Mutual funds net asset value $ 1     $ 1    
Equity Securities | Fair Value, Inputs, Level 3
           
Fair value of ARS recorded in trading equity securities 13     13   123
Gains recognized from redemptions of ARS 4     12    
FHLB stock and Federal Reserve Bank stock 597     597    
Repurchase of stock by FHLB of Atlanta       93    
Equity Securities, Coca Cola | Fair Value, Inputs, Level 3
           
Derivative in a liability position, fair value 154     154   145
Trading Account Assets | Fair Value, Inputs, Level 2
           
Trading loans were outstanding 415     415   381
Residential Mortgage, Loans Held For Sale | Non Performing Loans
           
Transferred loans that were previously designated as held for investment to held for sale       47 160  
Incremental charge-off       10    
Loans sold at carrying value 34     34    
Loans returned to LHFI       13    
Residential Mortgage, Loans Held For Sale | Fair Value, Inputs, Level 2
           
Recognized losses due to changes in fair value attributable to borrower-specific credit risk 4   8 9 12  
Corporate and Other | Fair Value, Inputs, Level 3
           
Loans that were acquired through the acquisition of GB&T 4     4    
Residential Mortgage Loans | Nonmarketable securities | Fair Value, Inputs, Level 3
           
Loans held for investment 445     445    
Brokered Deposits | Fair Value, Inputs, Level 2
           
Recognized gains (losses) on liabilities due to changes in its own credit spread 1   22 (13) 7  
Long-Term Debt | Fair Value, Inputs, Level 2
           
Recognized gains (losses) on liabilities due to changes in its own credit spread 5   61 (15) (17)  
Private Equity Funds | Other Assets | Fair Value, Inputs, Level 3
           
Impairment charge 2   0 4 2  
Repossessed Personal Property | Other Assets | Fair Value, Inputs, Level 2
           
Impairment charge 1   1 1 7  
Lower Limit
           
Probable forecasted sale of Coke       6.5    
Upper Limit
           
Probable forecasted sale of Coke       7    
Collateralized Debt Obligations | Interests in Company Sponsored Securitizations
           
Trust preferred securitization interests 42     42    
Total Return Swap | Fair Value, Inputs, Level 2
           
LHFI at fair value 1,100     1,100   972
Interest Rate Lock Commitments
           
Transferred out of level 3 in the fair value hierarchy 40   62 54 129  
Collateralized Loan Obligations | Fair Value, Inputs, Level 2
           
Issued securities contained in a consolidated CLO at fair value in order to recognize the nonrecourse nature of these liabilities 289     289    
Affordable Housing
           
Impairment charge 0   5 0 5  
Other Assets | Fair Value, Inputs, Level 3
           
Impairment charge 0   0 0 2  
Fair Value, Inputs, Level 2 | Personal Property Under Operating Leases
           
Impairment charge $ 0   $ 2 $ 1 $ 11