Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - First Lien Mortgage VIEs (Details)

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Securitizations and Other Variable Interest Entities - First Lien Mortgage VIEs (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
On-balance sheet assets      
Trading account assets $ 178,987,000,000   $ 176,527,000,000
Debt securities carried at fair value 302,333,000,000   322,380,000,000
Held-to-maturity securities 97,978,000,000   84,625,000,000
Loans Accounted for Under the Fair Value Option 8,212,000,000   6,938,000,000
Loans and leases 901,113,000,000   896,983,000,000
All other assets 109,913,000,000   114,600,000,000
Total assets 2,185,498,000,000 $ 2,143,545,000,000 2,144,316,000,000
On-balance sheet liabilities      
Long-term debt 232,849,000,000   236,764,000,000
Total liabilities 1,922,722,000,000   1,888,111,000,000
Unpaid principal balance of mortgage loans eligible for repurchase 169,000,000   222,000,000
Principal amount that would be payable to the securitization vehicles 169,000,000   222,000,000
Recurring      
On-balance sheet assets      
Trading account assets 178,987,000,000   176,527,000,000
Loans Accounted for Under the Fair Value Option 8,212,000,000   6,938,000,000
Unconsolidated VIEs | First Lien Mortgage Securitization Trusts | Available-for-sale Securities      
On-balance sheet liabilities      
Other than temporary impairment losses recorded on debt securities 0 $ 0  
Unconsolidated VIEs | Agency      
Variable Interest Entity [Line Items]      
Maximum loss exposure 27,068,000,000   28,188,000,000
On-balance sheet assets      
Residual interests held 0   0
All other assets 15,000,000   15,000,000
Total assets 27,068,000,000   28,188,000,000
Principal amount outstanding 308,996,000,000   313,613,000,000
Unconsolidated VIEs | Agency | Senior Lien      
On-balance sheet assets      
Trading account assets 996,000,000   1,297,000,000
Debt securities carried at fair value 21,974,000,000   24,369,000,000
Held-to-maturity securities 4,083,000,000   2,507,000,000
Unconsolidated VIEs | Agency | Junior Lien      
On-balance sheet assets      
Trading account assets 0   0
Debt securities carried at fair value 0   0
Held-to-maturity securities 0   0
Unconsolidated VIEs | Non-agency | Prime      
Variable Interest Entity [Line Items]      
Maximum loss exposure 966,000,000   1,027,000,000
On-balance sheet assets      
Residual interests held 0   0
All other assets 36,000,000   40,000,000
Total assets 649,000,000   708,000,000
Principal amount outstanding 15,262,000,000   16,087,000,000
Unconsolidated VIEs | Non-agency | Prime | Senior Lien      
On-balance sheet assets      
Trading account assets 31,000,000   42,000,000
Debt securities carried at fair value 570,000,000   613,000,000
Held-to-maturity securities 0   0
Unconsolidated VIEs | Non-agency | Prime | Junior Lien      
On-balance sheet assets      
Trading account assets 1,000,000   1,000,000
Debt securities carried at fair value 11,000,000   12,000,000
Held-to-maturity securities 0   0
Unconsolidated VIEs | Non-agency | Subprime      
Variable Interest Entity [Line Items]      
Maximum loss exposure 2,746,000,000   2,905,000,000
On-balance sheet assets      
Residual interests held 0   0
All other assets 0   0
Total assets 2,456,000,000   2,613,000,000
Principal amount outstanding 26,737,000,000   27,854,000,000
Unconsolidated VIEs | Non-agency | Subprime | Senior Lien      
On-balance sheet assets      
Trading account assets 59,000,000   94,000,000
Debt securities carried at fair value 2,364,000,000   2,479,000,000
Held-to-maturity securities 0   0
Unconsolidated VIEs | Non-agency | Subprime | Junior Lien      
On-balance sheet assets      
Trading account assets 31,000,000   37,000,000
Debt securities carried at fair value 2,000,000   3,000,000
Held-to-maturity securities 0   0
Unconsolidated VIEs | Non-agency | Alt-A Loan      
Variable Interest Entity [Line Items]      
Maximum loss exposure 561,000,000   622,000,000
On-balance sheet assets      
Residual interests held 0   0
All other assets 132,000,000   153,000,000
Total assets 561,000,000   622,000,000
Principal amount outstanding 38,976,000,000   40,848,000,000
Unconsolidated VIEs | Non-agency | Alt-A Loan | Senior Lien      
On-balance sheet assets      
Trading account assets 73,000,000   99,000,000
Debt securities carried at fair value 327,000,000   340,000,000
Held-to-maturity securities 0   0
Unconsolidated VIEs | Non-agency | Alt-A Loan | Junior Lien      
On-balance sheet assets      
Trading account assets 2,000,000   2,000,000
Debt securities carried at fair value 27,000,000   28,000,000
Held-to-maturity securities 0   0
Unconsolidated VIEs | Commercial Mortgage      
Variable Interest Entity [Line Items]      
Maximum loss exposure 404,000,000   326,000,000
On-balance sheet assets      
Residual interests held 30,000,000   48,000,000
All other assets 0   0
Total assets 286,000,000   233,000,000
Principal amount outstanding 30,754,000,000   34,243,000,000
Unconsolidated VIEs | Commercial Mortgage | Senior Lien      
On-balance sheet assets      
Trading account assets 57,000,000   59,000,000
Debt securities carried at fair value 0   0
Held-to-maturity securities 43,000,000   37,000,000
Unconsolidated VIEs | Commercial Mortgage | Junior Lien      
On-balance sheet assets      
Trading account assets 88,000,000   22,000,000
Debt securities carried at fair value 54,000,000   54,000,000
Held-to-maturity securities 14,000,000   13,000,000
Consolidated VIEs | Recurring      
On-balance sheet assets      
Loans Accounted for Under the Fair Value Option 765,000,000    
Consolidated VIEs | Agency      
Variable Interest Entity [Line Items]      
Maximum loss exposure 22,442,000,000   26,878,000,000
On-balance sheet assets      
Trading account assets 372,000,000   1,101,000,000
Loans and leases 21,670,000,000   25,328,000,000
All other assets 401,000,000   449,000,000
Total assets 22,443,000,000   26,878,000,000
On-balance sheet liabilities      
Long-term debt 1,000,000   0
All other liabilities 1,000,000   1,000,000
Total liabilities 2,000,000   1,000,000
Consolidated VIEs | Non-agency | Prime      
Variable Interest Entity [Line Items]      
Maximum loss exposure 57,000,000   65,000,000
On-balance sheet assets      
Trading account assets 0   0
Loans and leases 87,000,000   111,000,000
All other assets 8,000,000   0
Total assets 95,000,000   111,000,000
On-balance sheet liabilities      
Long-term debt 38,000,000   46,000,000
All other liabilities 0   0
Total liabilities 38,000,000   46,000,000
Consolidated VIEs | Non-agency | Subprime      
Variable Interest Entity [Line Items]      
Maximum loss exposure 185,000,000   232,000,000
On-balance sheet assets      
Trading account assets 0   188,000,000
Loans and leases 678,000,000   675,000,000
All other assets 48,000,000   54,000,000
Total assets 726,000,000   917,000,000
On-balance sheet liabilities      
Long-term debt 694,000,000   840,000,000
All other liabilities 0   0
Total liabilities 694,000,000   840,000,000
Consolidated VIEs | Non-agency | Alt-A Loan      
Variable Interest Entity [Line Items]      
Maximum loss exposure 0   0
On-balance sheet assets      
Trading account assets 0   0
Loans and leases 0   0
All other assets 0   0
Total assets 0   0
On-balance sheet liabilities      
Long-term debt 0   0
All other liabilities 0   0
Total liabilities 0   0
Consolidated VIEs | Commercial Mortgage      
Variable Interest Entity [Line Items]      
Maximum loss exposure 0   0
On-balance sheet assets      
Trading account assets 0   0
Loans and leases 0   0
All other assets 0   0
Total assets 0   0
On-balance sheet liabilities      
Long-term debt 0   0
All other liabilities 0   0
Total liabilities $ 0   $ 0