Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details)

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Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
On-balance sheet assets                
Trading account assets $ 180,018,000,000   $ 180,018,000,000     $ 191,785,000,000    
Debt securities carried at fair value 325,078,000,000   325,078,000,000     320,695,000,000    
Held-to-maturity securities 66,573,000,000   66,573,000,000     59,766,000,000    
Loans and leases 887,689,000,000   887,689,000,000     881,391,000,000    
Allowance for loan and lease losses (12,657,000,000) $ (15,106,000,000) (12,657,000,000) $ (15,106,000,000) $ (13,068,000,000) (14,419,000,000) $ (15,811,000,000) $ (17,428,000,000)
All other assets 108,871,000,000   108,871,000,000     112,063,000,000    
Total assets 2,153,006,000,000 2,123,613,000,000 2,153,006,000,000 2,123,613,000,000   2,104,534,000,000    
On-balance sheet liabilities                
Long-term debt 237,288,000,000   237,288,000,000     243,139,000,000    
Total liabilities 1,897,101,000,000   1,897,101,000,000     1,861,063,000,000    
Unpaid principal balance of mortgage loans eligible for repurchase 221,000,000   221,000,000     635,000,000    
Principal amount that would be payable to the securitization vehicles 221,000,000   221,000,000     635,000,000    
Unconsolidated VIEs                
On-balance sheet liabilities                
Other than temporary impairment losses recorded on AFS debt securities 0 $ 0 0 $ 0        
Unconsolidated VIEs | Agency                
Variable Interest Entity [Line Items]                
Maximum loss exposure 29,091,000,000   29,091,000,000     14,918,000,000    
On-balance sheet assets                
Residual interests held 0   0     0    
All other assets 16,000,000   16,000,000     24,000,000    
Total assets 29,091,000,000   29,091,000,000     14,918,000,000    
Principal amount outstanding 324,928,000,000   324,928,000,000     397,055,000,000    
Unconsolidated VIEs | Agency | Senior Lien                
On-balance sheet assets                
Trading account assets 1,103,000,000   1,103,000,000     584,000,000    
Debt securities carried at fair value 25,951,000,000   25,951,000,000     13,473,000,000    
Held-to-maturity securities 2,021,000,000   2,021,000,000     837,000,000    
Unconsolidated VIEs | Agency | Junior Lien                
On-balance sheet assets                
Trading account assets 0   0     0    
Debt securities carried at fair value 0   0     0    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Prime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 1,088,000,000   1,088,000,000     1,288,000,000    
On-balance sheet assets                
Residual interests held 3,000,000   3,000,000     10,000,000    
All other assets 41,000,000   41,000,000     56,000,000    
Total assets 718,000,000   718,000,000     897,000,000    
Principal amount outstanding 17,261,000,000   17,261,000,000     20,167,000,000    
Unconsolidated VIEs | Non-agency | Prime | Senior Lien                
On-balance sheet assets                
Trading account assets 4,000,000   4,000,000     3,000,000    
Debt securities carried at fair value 658,000,000   658,000,000     816,000,000    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Prime | Junior Lien                
On-balance sheet assets                
Trading account assets 0   0     0    
Debt securities carried at fair value 12,000,000   12,000,000     12,000,000    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Subprime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 3,015,000,000   3,015,000,000     3,167,000,000    
On-balance sheet assets                
Residual interests held 0   0     0    
All other assets 0   0     1,000,000    
Total assets 2,694,000,000   2,694,000,000     2,831,000,000    
Principal amount outstanding 28,873,000,000   28,873,000,000     32,592,000,000    
Unconsolidated VIEs | Non-agency | Subprime | Senior Lien                
On-balance sheet assets                
Trading account assets 85,000,000   85,000,000     14,000,000    
Debt securities carried at fair value 2,570,000,000   2,570,000,000     2,811,000,000    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Subprime | Junior Lien                
On-balance sheet assets                
Trading account assets 36,000,000   36,000,000     0    
Debt securities carried at fair value 3,000,000   3,000,000     5,000,000    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Alt-A Loan                
Variable Interest Entity [Line Items]                
Maximum loss exposure 647,000,000   647,000,000     710,000,000    
On-balance sheet assets                
Residual interests held 0   0     0    
All other assets 164,000,000   164,000,000     245,000,000    
Total assets 647,000,000   647,000,000     710,000,000    
Principal amount outstanding 43,693,000,000   43,693,000,000     50,054,000,000    
Unconsolidated VIEs | Non-agency | Alt-A Loan | Senior Lien                
On-balance sheet assets                
Trading account assets 93,000,000   93,000,000     81,000,000    
Debt securities carried at fair value 359,000,000   359,000,000     383,000,000    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Alt-A Loan | Junior Lien                
On-balance sheet assets                
Trading account assets 1,000,000   1,000,000     1,000,000    
Debt securities carried at fair value 30,000,000   30,000,000     0    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Commercial Mortgage                
Variable Interest Entity [Line Items]                
Maximum loss exposure 413,000,000   413,000,000     352,000,000    
On-balance sheet assets                
Residual interests held 59,000,000   59,000,000     22,000,000    
All other assets 0   0     0    
Total assets 314,000,000   314,000,000     325,000,000    
Principal amount outstanding 25,308,000,000   25,308,000,000     20,593,000,000    
Unconsolidated VIEs | Commercial Mortgage | Senior Lien                
On-balance sheet assets                
Trading account assets 114,000,000   114,000,000     54,000,000    
Debt securities carried at fair value 0   0     76,000,000    
Held-to-maturity securities 38,000,000   38,000,000     42,000,000    
Unconsolidated VIEs | Commercial Mortgage | Junior Lien                
On-balance sheet assets                
Trading account assets 35,000,000   35,000,000     58,000,000    
Debt securities carried at fair value 55,000,000   55,000,000     58,000,000    
Held-to-maturity securities 13,000,000   13,000,000     15,000,000    
Consolidated VIEs | Agency                
Variable Interest Entity [Line Items]                
Maximum loss exposure 27,559,000,000   27,559,000,000     38,345,000,000    
On-balance sheet assets                
Trading account assets 696,000,000   696,000,000     1,538,000,000    
Loans and leases 26,518,000,000   26,518,000,000     36,187,000,000    
Allowance for loan and lease losses 0   0     (2,000,000)    
All other assets 345,000,000   345,000,000     623,000,000    
Total assets 27,559,000,000   27,559,000,000     38,346,000,000    
On-balance sheet liabilities                
Long-term debt 0   0     1,000,000    
All other liabilities 10,000,000   10,000,000     0    
Total liabilities 10,000,000   10,000,000     1,000,000    
Consolidated VIEs | Non-agency | Prime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 70,000,000   70,000,000     77,000,000    
On-balance sheet assets                
Trading account assets 0   0     0    
Loans and leases 122,000,000   122,000,000     130,000,000    
Allowance for loan and lease losses 0   0     0    
All other assets 0   0     6,000,000    
Total assets 122,000,000   122,000,000     136,000,000    
On-balance sheet liabilities                
Long-term debt 52,000,000   52,000,000     56,000,000    
All other liabilities 0   0     3,000,000    
Total liabilities 52,000,000   52,000,000     59,000,000    
Consolidated VIEs | Non-agency | Subprime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 225,000,000   225,000,000     206,000,000    
On-balance sheet assets                
Trading account assets 105,000,000   105,000,000     30,000,000    
Loans and leases 714,000,000   714,000,000     768,000,000    
Allowance for loan and lease losses 0   0     0    
All other assets 51,000,000   51,000,000     15,000,000    
Total assets 870,000,000   870,000,000     813,000,000    
On-balance sheet liabilities                
Long-term debt 808,000,000   808,000,000     770,000,000    
All other liabilities 0   0     13,000,000    
Total liabilities 808,000,000   808,000,000     783,000,000    
Consolidated VIEs | Non-agency | Alt-A Loan                
Variable Interest Entity [Line Items]                
Maximum loss exposure 0   0     0    
On-balance sheet assets                
Trading account assets 0   0     0    
Loans and leases 0   0     0    
Allowance for loan and lease losses 0   0     0    
All other assets 0   0     0    
Total assets 0   0     0    
On-balance sheet liabilities                
Long-term debt 0   0     0    
All other liabilities 0   0     0    
Total liabilities 0   0     0    
Consolidated VIEs | Commercial Mortgage                
Variable Interest Entity [Line Items]                
Maximum loss exposure 0   0     0    
On-balance sheet assets                
Trading account assets 0   0     0    
Loans and leases 0   0     0    
Allowance for loan and lease losses 0   0     0    
All other assets 0   0     0    
Total assets 0   0     0    
On-balance sheet liabilities                
Long-term debt 0   0     0    
All other liabilities 0   0     0    
Total liabilities $ 0   $ 0     $ 0