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, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
On-balance sheet assets                
Trading account assets $ 189,106,000,000   $ 189,106,000,000     $ 191,785,000,000    
Debt securities carried at fair value 332,307,000,000   332,307,000,000     320,695,000,000    
Held-to-maturity securities 60,072,000,000   60,072,000,000     59,766,000,000    
Loans and leases 886,449,000,000   886,449,000,000     881,391,000,000    
Allowance for loan and lease losses (13,068,000,000) $ (15,811,000,000) (13,068,000,000) $ (15,811,000,000) $ (13,676,000,000) (14,419,000,000) $ (16,618,000,000) $ (17,428,000,000)
All other assets 113,175,000,000   113,175,000,000     112,063,000,000    
Total assets 2,149,034,000,000 2,170,557,000,000 2,149,034,000,000 2,170,557,000,000   2,104,534,000,000    
On-balance sheet liabilities                
Long-term debt 243,414,000,000   243,414,000,000     243,139,000,000    
Total liabilities 1,897,375,000,000   1,897,375,000,000     1,861,063,000,000    
Unpaid principal balance of mortgage loans eligible for repurchase 180,000,000   180,000,000     635,000,000    
Principal amount that would be payable to the securitization vehicles 180,000,000   180,000,000     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 24,816,000,000   24,816,000,000     14,918,000,000    
On-balance sheet assets                
Residual interests held 0   0     0    
All other assets 17,000,000   17,000,000     24,000,000    
Total assets 24,816,000,000   24,816,000,000     14,918,000,000    
Principal amount outstanding 338,751,000,000   338,751,000,000     397,055,000,000    
Unconsolidated VIEs | Agency | Senior Lien                
On-balance sheet assets                
Trading account assets 1,206,000,000   1,206,000,000     584,000,000    
Debt securities carried at fair value 22,921,000,000   22,921,000,000     13,473,000,000    
Held-to-maturity securities 672,000,000   672,000,000     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 1,163,000,000   1,163,000,000     1,288,000,000    
On-balance sheet assets                
Residual interests held 3,000,000   3,000,000     10,000,000    
All other assets 48,000,000   48,000,000     56,000,000    
Total assets 783,000,000   783,000,000     897,000,000    
Principal amount outstanding 18,334,000,000   18,334,000,000     20,167,000,000    
Unconsolidated VIEs | Non-agency | Prime | Senior Lien                
On-balance sheet assets                
Trading account assets 3,000,000   3,000,000     3,000,000    
Debt securities carried at fair value 716,000,000   716,000,000     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 13,000,000   13,000,000     12,000,000    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Non-agency | Subprime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 3,132,000,000   3,132,000,000     3,167,000,000    
On-balance sheet assets                
Residual interests held 0   0     0    
All other assets 0   0     1,000,000    
Total assets 2,732,000,000   2,732,000,000     2,831,000,000    
Principal amount outstanding 30,753,000,000   30,753,000,000     32,592,000,000    
Unconsolidated VIEs | Non-agency | Subprime | Senior Lien                
On-balance sheet assets                
Trading account assets 25,000,000   25,000,000     14,000,000    
Debt securities carried at fair value 2,675,000,000   2,675,000,000     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 29,000,000   29,000,000     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 684,000,000   684,000,000     710,000,000    
On-balance sheet assets                
Residual interests held 0   0     0    
All other assets 194,000,000   194,000,000     245,000,000    
Total assets 684,000,000   684,000,000     710,000,000    
Principal amount outstanding 46,313,000,000   46,313,000,000     50,054,000,000    
Unconsolidated VIEs | Non-agency | Alt-A Loan | Senior Lien                
On-balance sheet assets                
Trading account assets 87,000,000   87,000,000     81,000,000    
Debt securities carried at fair value 369,000,000   369,000,000     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 2,000,000   2,000,000     1,000,000    
Debt securities carried at fair value 32,000,000   32,000,000     0    
Held-to-maturity securities 0   0     0    
Unconsolidated VIEs | Commercial Mortgage                
Variable Interest Entity [Line Items]                
Maximum loss exposure 354,000,000   354,000,000     352,000,000    
On-balance sheet assets                
Residual interests held 10,000,000   10,000,000     22,000,000    
All other assets 0   0     0    
Total assets 265,000,000   265,000,000     325,000,000    
Principal amount outstanding 30,505,000,000   30,505,000,000     20,593,000,000    
Unconsolidated VIEs | Commercial Mortgage | Senior Lien                
On-balance sheet assets                
Trading account assets 99,000,000   99,000,000     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 49,000,000   49,000,000     58,000,000    
Debt securities carried at fair value 55,000,000   55,000,000     58,000,000    
Held-to-maturity securities 14,000,000   14,000,000     15,000,000    
Consolidated VIEs | Agency                
Variable Interest Entity [Line Items]                
Maximum loss exposure 32,598,000,000   32,598,000,000     38,345,000,000    
On-balance sheet assets                
Trading account assets 911,000,000   911,000,000     1,538,000,000    
Loans and leases 30,988,000,000   30,988,000,000     36,187,000,000    
Allowance for loan and lease losses (2,000,000)   (2,000,000)     (2,000,000)    
All other assets 701,000,000   701,000,000     623,000,000    
Total assets 32,598,000,000   32,598,000,000     38,346,000,000    
On-balance sheet liabilities                
Long-term debt 0   0     1,000,000    
All other liabilities 15,000,000   15,000,000     0    
Total liabilities 15,000,000   15,000,000     1,000,000    
Consolidated VIEs | Non-agency | Prime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 73,000,000   73,000,000     77,000,000    
On-balance sheet assets                
Trading account assets 0   0     0    
Loans and leases 123,000,000   123,000,000     130,000,000    
Allowance for loan and lease losses 0   0     0    
All other assets 3,000,000   3,000,000     6,000,000    
Total assets 126,000,000   126,000,000     136,000,000    
On-balance sheet liabilities                
Long-term debt 53,000,000   53,000,000     56,000,000    
All other liabilities 0   0     3,000,000    
Total liabilities 53,000,000   53,000,000     59,000,000    
Consolidated VIEs | Non-agency | Subprime                
Variable Interest Entity [Line Items]                
Maximum loss exposure 195,000,000   195,000,000     206,000,000    
On-balance sheet assets                
Trading account assets 29,000,000   29,000,000     30,000,000    
Loans and leases 740,000,000   740,000,000     768,000,000    
Allowance for loan and lease losses 0   0     0    
All other assets 19,000,000   19,000,000     15,000,000    
Total assets 788,000,000   788,000,000     813,000,000    
On-balance sheet liabilities                
Long-term debt 755,000,000   755,000,000     770,000,000    
All other liabilities 4,000,000   4,000,000     13,000,000    
Total liabilities 759,000,000   759,000,000     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