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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
On-balance sheet assets          
Trading account assets $ 216,369,000,000   $ 216,369,000,000   $ 180,209,000,000
Debt securities carried at fair value 315,509,000,000   315,509,000,000   313,660,000,000
Held-to-maturity securities 119,008,000,000   119,008,000,000   117,071,000,000
Loans and leases 916,666,000,000   916,666,000,000   906,683,000,000
All other assets 124,397,000,000   124,397,000,000   120,709,000,000
Total assets 2,254,529,000,000 $ 2,186,966,000,000 2,254,529,000,000 $ 2,186,966,000,000 2,187,702,000,000
On-balance sheet liabilities          
Long-term debt 223,923,000,000   223,923,000,000   216,823,000,000
Total liabilities 1,983,542,000,000   1,983,542,000,000   1,920,862,000,000
Other than temporary impairment losses recorded on debt securities 6,000,000 5,000,000 33,000,000 12,000,000  
Unpaid principal balance of mortgage loans eligible for repurchase 136,000,000   136,000,000   189,000,000
Principal amount that would be payable to the securitization vehicles 136,000,000   136,000,000   189,000,000
Unconsolidated VIEs | Residential Mortgage - Agency          
Variable Interest Entity [Line Items]          
Maximum loss exposure 20,056,000,000   20,056,000,000   22,661,000,000
On-balance sheet assets          
Residual interests held 0   0   0
All other assets 11,000,000   11,000,000   12,000,000
Total assets 20,056,000,000   20,056,000,000   22,661,000,000
Principal balance outstanding 249,610,000,000   249,610,000,000   265,332,000,000
Unconsolidated VIEs | Residential Mortgage - Agency | Senior Lien          
On-balance sheet assets          
Trading account assets 463,000,000   463,000,000   1,399,000,000
Debt securities carried at fair value 16,138,000,000   16,138,000,000   17,620,000,000
Held-to-maturity securities 3,444,000,000   3,444,000,000   3,630,000,000
Unconsolidated VIEs | Residential Mortgage - 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 661,000,000   661,000,000   757,000,000
On-balance sheet assets          
Residual interests held 0   0   0
All other assets 24,000,000   24,000,000   28,000,000
Total assets 429,000,000   429,000,000   498,000,000
Principal balance outstanding 11,678,000,000   11,678,000,000   16,280,000,000
Unconsolidated VIEs | Non-agency | Prime | Senior Lien          
On-balance sheet assets          
Trading account assets 13,000,000   13,000,000   20,000,000
Debt securities carried at fair value 385,000,000   385,000,000   441,000,000
Held-to-maturity securities 0   0   0
Unconsolidated VIEs | Non-agency | Prime | Junior Lien          
On-balance sheet assets          
Trading account assets 1,000,000   1,000,000   1,000,000
Debt securities carried at fair value 6,000,000   6,000,000   8,000,000
Held-to-maturity securities 0   0   0
Unconsolidated VIEs | Non-agency | Subprime          
Variable Interest Entity [Line Items]          
Maximum loss exposure 2,596,000,000   2,596,000,000   2,750,000,000
On-balance sheet assets          
Residual interests held 0   0   0
All other assets 0   0   0
Total assets 2,218,000,000   2,218,000,000   2,372,000,000
Principal balance outstanding 17,853,000,000   17,853,000,000   19,373,000,000
Unconsolidated VIEs | Non-agency | Subprime | Senior Lien          
On-balance sheet assets          
Trading account assets 6,000,000   6,000,000   112,000,000
Debt securities carried at fair value 2,195,000,000   2,195,000,000   2,235,000,000
Held-to-maturity securities 0   0   0
Unconsolidated VIEs | Non-agency | Subprime | Junior Lien          
On-balance sheet assets          
Trading account assets 15,000,000   15,000,000   23,000,000
Debt securities carried at fair value 2,000,000   2,000,000   2,000,000
Held-to-maturity securities 0   0   0
Unconsolidated VIEs | Non-agency | Alt-A          
Variable Interest Entity [Line Items]          
Maximum loss exposure 504,000,000   504,000,000   560,000,000
On-balance sheet assets          
Residual interests held 0   0   0
All other assets 97,000,000   97,000,000   113,000,000
Total assets 504,000,000   504,000,000   560,000,000
Principal balance outstanding 31,141,000,000   31,141,000,000   35,788,000,000
Unconsolidated VIEs | Non-agency | Alt-A | Senior Lien          
On-balance sheet assets          
Trading account assets 78,000,000   78,000,000   118,000,000
Debt securities carried at fair value 307,000,000   307,000,000   305,000,000
Held-to-maturity securities 0   0   0
Unconsolidated VIEs | Non-agency | Alt-A | Junior Lien          
On-balance sheet assets          
Trading account assets 1,000,000   1,000,000   1,000,000
Debt securities carried at fair value 21,000,000   21,000,000   23,000,000
Held-to-maturity securities 0   0   0
Unconsolidated VIEs | Commercial Mortgage          
Variable Interest Entity [Line Items]          
Maximum loss exposure 372,000,000   372,000,000   344,000,000
On-balance sheet assets          
Residual interests held 24,000,000   24,000,000   25,000,000
All other assets 0   0   0
Total assets 251,000,000   251,000,000   221,000,000
Principal balance outstanding 18,393,000,000   18,393,000,000   23,826,000,000
Unconsolidated VIEs | Commercial Mortgage | Senior Lien          
On-balance sheet assets          
Trading account assets 64,000,000   64,000,000   51,000,000
Debt securities carried at fair value 0   0   0
Held-to-maturity securities 93,000,000   93,000,000   64,000,000
Unconsolidated VIEs | Commercial Mortgage | Junior Lien          
On-balance sheet assets          
Trading account assets 22,000,000   22,000,000   14,000,000
Debt securities carried at fair value 48,000,000   48,000,000   54,000,000
Held-to-maturity securities 0   0   13,000,000
Unconsolidated VIEs | First Lien Mortgage Securitization Trusts          
On-balance sheet liabilities          
Other than temporary impairment losses recorded on debt securities 1,000,000 16,000,000 2,000,000 4,000,000  
Other than temporary impairment losses recorded on held-to-maturity securities   $ 0 0 $ 0  
Consolidated VIEs | Residential Mortgage - Agency          
Variable Interest Entity [Line Items]          
Maximum loss exposure 16,009,000,000   16,009,000,000   18,084,000,000
On-balance sheet assets          
Trading account assets 137,000,000   137,000,000   434,000,000
Loans and leases 15,581,000,000   15,581,000,000   17,223,000,000
All other assets 291,000,000   291,000,000   427,000,000
Total assets 16,009,000,000   16,009,000,000   18,084,000,000
On-balance sheet liabilities          
Long-term debt 0   0   0
All other liabilities 2,000,000   2,000,000   4,000,000
Total liabilities 2,000,000   2,000,000   4,000,000
Consolidated VIEs | Non-agency | Prime          
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
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 | Non-agency | Subprime          
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
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 | Non-agency | Alt-A          
Variable Interest Entity [Line Items]          
Maximum loss exposure 0   0   25,000,000
On-balance sheet assets          
Trading account assets 0   0   99,000,000
Loans and leases 0   0   0
All other assets 0   0   0
Total assets 0   0   99,000,000
On-balance sheet liabilities          
Long-term debt 0   0   74,000,000
All other liabilities 0   0   0
Total liabilities 0   0   74,000,000
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
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