v2.4.0.8
Loans and Allowance for Credit Losses Textual (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Unearned income, net deferred loan fees and unamortized discount and premium $ 6,700,000,000   $ 6,700,000,000   $ 7,400,000,000
Loan charge-offs 1,669,000,000 2,689,000,000 3,530,000,000 5,569,000,000  
Allowance for Credit Losses, Purchased Credit-Impaired 71,000,000 212,000,000 71,000,000 212,000,000 117,000,000
Financing Receivable, Recorded Investment, nonaccrual status 17,915,000,000   17,915,000,000   20,486,000,000
90 days or more past due and still accruing 22,197,000,000   22,197,000,000   23,245,000,000
Impaired loans, Recorded Investment 29,679,000,000   29,679,000,000   30,012,000,000
Unpaid principal balance 35,840,000,000   35,840,000,000   36,255,000,000
Total unfunded loan commitments on troubled debt restructurings 471,000,000   471,000,000   421,000,000
Financing Receivable Modifications, principal forgiven 95,000,000 130,000,000 229,000,000 221,000,000  
Other interest rate concessions, primary modification type 1,525,000,000 1,314,000,000 3,991,000,000 3,143,000,000  
High Value Properties, Threshold 1,000,000   1,000,000    
Loans remodified 647,000,000 601,000,000 1,600,000,000 1,200,000,000  
Home Affordable Modification Program [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Impaired loans, Recorded Investment 352,000,000   352,000,000   402,000,000
Second Lien Modification Program [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Impaired loans, Recorded Investment 53,000,000   53,000,000   45,000,000
Proprietary Program [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Impaired loans, Recorded Investment 311,000,000   311,000,000   258,000,000
Purchased Credit-Impaired Loans [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 5,400,000,000   5,400,000,000   6,000,000,000
Trial modifications [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Impaired loans, Recorded Investment 716,000,000   716,000,000   705,000,000
Trial modifications [Member] | Financing Receivable Accruing [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Impaired loans, Recorded Investment 295,000,000   295,000,000   276,000,000
Trial modifications [Member] | Financing Receivable Nonaccruing [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Impaired loans, Recorded Investment 421,000,000   421,000,000   429,000,000
Commercial and Industrial Loans [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 184,000,000 360,000,000 365,000,000 719,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 1,022,000,000   1,022,000,000   1,422,000,000
Impaired loans, Recorded Investment 1,499,000,000   1,499,000,000   2,086,000,000
Unpaid principal balance 2,502,000,000   2,502,000,000   3,331,000,000
Commercial and Industrial Loans [Member] | Purchased Credit-Impaired Loans [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 6,000,000   6,000,000   23,000,000
Commercial Real Estate Mortgage [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 49,000,000 114,000,000 109,000,000 196,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 2,708,000,000   2,708,000,000   3,322,000,000
Impaired loans, Recorded Investment 4,113,000,000   4,113,000,000   4,673,000,000
Unpaid principal balance 5,130,000,000   5,130,000,000   5,766,000,000
Commercial Real Estate Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 81,000,000   81,000,000   140,000,000
Commercial Real Estate Construction [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 7,000,000 60,000,000 12,000,000 140,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 665,000,000   665,000,000   1,003,000,000
Impaired loans, Recorded Investment 981,000,000   981,000,000   1,345,000,000
Unpaid principal balance 1,407,000,000   1,407,000,000   1,975,000,000
Commercial Real Estate Construction [Member] | Purchased Credit-Impaired Loans [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 101,000,000   101,000,000   127,000,000
Commercial Real Estate Mortgage and Construction Loans [Member] | Criticized [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loans, excluding Purchased Credit Impaired Loans 16,400,000,000   16,400,000,000    
Financing Receivable, Recorded Investment, nonaccrual status 3,400,000,000   3,400,000,000    
Total Commercial [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 272,000,000 556,000,000 532,000,000 1,114,000,000  
Allowance for Credit Losses, Purchased Credit-Impaired 49,000,000   49,000,000   88,000,000
Financing Receivable, Recorded Investment, nonaccrual status 4,455,000,000   4,455,000,000   5,824,000,000
Impaired loans, Recorded Investment 6,661,000,000   6,661,000,000   8,186,000,000
Unpaid principal balance 9,200,000,000   9,200,000,000   11,235,000,000
Total Commercial [Member] | Loans held for sale [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Financing Receivable, Recorded Investment, nonaccrual status 15,000,000   15,000,000   16,000,000
Total Commercial [Member] | Purchased Credit-Impaired Loans [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 351,000,000   351,000,000   457,000,000
Total Consumer [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 1,397,000,000 2,133,000,000 2,998,000,000 4,455,000,000  
Allowance for Credit Losses, Purchased Credit-Impaired 22,000,000   22,000,000   29,000,000
Financing Receivable, Recorded Investment, nonaccrual status 13,460,000,000   13,460,000,000   14,662,000,000
Financing Receivable, Recorded Investment, equal to or greater than 90 days past due 8,700,000,000   8,700,000,000   10,300,000,000
90 days or more past due and still accruing 938,000,000   938,000,000   1,100,000,000
Impaired loans, Recorded Investment 23,018,000,000   23,018,000,000   21,826,000,000
Unpaid principal balance 26,640,000,000   26,640,000,000   25,020,000,000
Total Consumer [Member] | Loans Discharged in Bankruptcy [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Other interest rate concessions, primary modification type 617,000,000   1,900,000,000    
Real estate 1-4 family first mortgage [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 392,000,000 772,000,000 867,000,000 1,600,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 10,705,000,000   10,705,000,000   11,455,000,000
Financing Receivables equal to or greater than 180 days past due, Percentage of Portfolio 2.50%   2.50%   3.00%
Impaired loans, Recorded Investment 19,754,000,000   19,754,000,000   18,472,000,000
Unpaid principal balance 22,778,000,000   22,778,000,000   21,293,000,000
Real estate 1-4 family first mortgage [Member] | Mortgages held for sale [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Financing Receivable, Recorded Investment, nonaccrual status 293,000,000   293,000,000   336,000,000
Real estate 1-4 family junior lien mortgage [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 428,000,000 757,000,000 942,000,000 1,577,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 2,522,000,000   2,522,000,000   2,922,000,000
Impaired loans, Recorded Investment 2,511,000,000   2,511,000,000   2,483,000,000
Unpaid principal balance 3,049,000,000   3,049,000,000   2,855,000,000
Automobile [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 126,000,000 131,000,000 290,000,000 310,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 200,000,000   200,000,000   245,000,000
Impaired loans, Recorded Investment 246,000,000   246,000,000   314,000,000
Unpaid principal balance 298,000,000   298,000,000   314,000,000
FHA Insured/VA Guaranteed [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 20,112,000,000   20,112,000,000   20,745,000,000
FHA Insured/VA Guaranteed [Member] | Financing Receivable 90 Days Or More Past Due [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Government insured/guaranteed loans 19,500,000,000   19,500,000,000   20,200,000,000
FHA Insured, VA Or FFELP Guaranteed [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Financing Receivable, certain purchases net of certain transfers to held for sale 805,000,000 2,000,000,000 2,800,000,000 5,500,000,000  
90 days or more past due and still accruing 21,000,000,000   21,000,000,000   21,800,000,000
Student Loans under FFELP [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
90 days or more past due and still accruing 931,000,000   931,000,000   1,065,000,000
Student Loans under FFELP [Member] | Financing Receivable 90 Days Or More Past Due [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Government insured/guaranteed loans 931,000,000   931,000,000   1,100,000,000
Lease Financing [Member]
         
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]          
Loan charge-offs 24,000,000 5,000,000 27,000,000 13,000,000  
Financing Receivable, Recorded Investment, nonaccrual status 20,000,000   20,000,000   27,000,000
Impaired loans, Recorded Investment 27,000,000   27,000,000   39,000,000
Unpaid principal balance $ 65,000,000   $ 65,000,000   $ 54,000,000