Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Home Equity Loan, Credit Card and Other Asset-backed VIEs (Details)

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Securitizations and Other Variable Interest Entities - Home Equity Loan, Credit Card and Other Asset-backed VIEs (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
On-balance sheet assets            
Trading account assets $ 210,319   $ 180,209      
Debt securities carried at fair value 316,864   313,660      
Held-to-maturity securities 122,345   117,071      
Loans and leases 927,117   906,683      
Allowance for loan and lease losses (10,693) $ (10,875) (11,237) $ (11,692) $ (11,837) $ (12,234)
All other assets 128,569   120,709      
Total assets 2,283,896   2,187,702 $ 2,195,314    
On-balance sheet liabilities            
Long-term debt 228,666   216,823      
Total liabilities 2,011,437   1,920,862      
Consolidated VIEs            
On-balance sheet assets            
Trading account assets 5,142   5,773      
Loans and leases 50,022   56,001      
Allowance for loan and lease losses (1,023)   (1,032)      
All other assets 662   1,596      
Total assets 54,869   62,526      
On-balance sheet liabilities            
Long-term debt 9,457   10,646      
All other liabilities 54   41      
Total liabilities 9,633   11,035      
Home equity lines of credit | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 1,632   2,732      
On-balance sheet assets            
Total assets 39   46      
Unconsolidated total assets of VIEs 2,598   4,274      
Home equity lines of credit | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 119   149      
On-balance sheet assets            
Trading account assets 0   0      
Loans and leases 192   244      
Allowance for loan and lease losses (13)   (16)      
All other assets 6   7      
Total assets 185   235      
On-balance sheet liabilities            
Short-term borrowings 0   0      
Long-term debt 82   108      
All other liabilities 0   0      
Total liabilities 82   108      
Home equity lines of credit | Senior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 0   0      
Debt securities carried at fair value 39   46      
Held-to-maturity securities 0   0      
Home equity lines of credit | Junior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 0   0      
Debt securities carried at fair value 0   0      
Credit Card Receivable | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 0   0      
On-balance sheet assets            
Total assets 0   0      
Unconsolidated total assets of VIEs 0   0      
Credit Card Receivable | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 22,937   25,859      
On-balance sheet assets            
Trading account assets 0   0      
Loans and leases 32,281   35,135      
Allowance for loan and lease losses (1,002)   (1,007)      
All other assets 276   793      
Total assets 31,555   34,921      
On-balance sheet liabilities            
Short-term borrowings 0   0      
Long-term debt 8,598   9,049      
All other liabilities 20   13      
Total liabilities 8,618   9,062      
Residual interests held 15,300   17,600      
Credit Card Receivable | Senior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 0   0      
Debt securities carried at fair value 0   0      
Held-to-maturity securities 0   0      
Credit Card Receivable | Junior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 0   0      
Debt securities carried at fair value 0   0      
Resecuritization Trusts | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 9,107   9,906      
On-balance sheet assets            
Total assets 9,107   9,906      
Unconsolidated total assets of VIEs 21,822   22,155      
Resecuritization Trusts | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 343   420      
On-balance sheet assets            
Trading account assets 864   1,428      
Loans and leases 0   0      
Allowance for loan and lease losses 0   0      
All other assets 0   0      
Total assets 864   1,428      
On-balance sheet liabilities            
Short-term borrowings 0   0      
Long-term debt 521   1,008      
All other liabilities 0   0      
Total liabilities 521   1,008      
Resecuritization Trusts | Senior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 1,246   902      
Debt securities carried at fair value 1,891   2,338      
Held-to-maturity securities 5,866   6,569      
Resecuritization Trusts | Junior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 30   27      
Debt securities carried at fair value 74   70      
Municipal Bond Trusts | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 1,566   1,635      
On-balance sheet assets            
Total assets 9   0      
Unconsolidated total assets of VIEs 2,250   2,406      
Municipal Bond Trusts | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 1,215   1,442      
On-balance sheet assets            
Trading account assets 1,214   1,454      
Loans and leases 0   0      
Allowance for loan and lease losses 0   0      
All other assets 1   0      
Total assets 1,215   1,454      
On-balance sheet liabilities            
Short-term borrowings 122   348      
Long-term debt 0   12      
All other liabilities 0   0      
Total liabilities 122   360      
Municipal Bond Trusts | Senior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 9   0      
Debt securities carried at fair value 0   0      
Held-to-maturity securities 0   0      
Municipal Bond Trusts | Junior Lien | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 0   0      
Debt securities carried at fair value $ 0   $ 0