Annual report pursuant to Section 13 and 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
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
On-balance sheet assets        
Trading account assets $ 214,348 $ 209,358    
Debt securities carried at fair value 238,101 315,117    
Held-to-maturity securities 203,652 125,013    
Securities 441,753 440,130    
Loans and leases 946,895 936,749    
Allowance for loan and lease losses (9,601) (10,393) $ (11,237) $ (12,234)
All other assets 116,320 135,043    
Total assets 2,354,507 2,281,234    
On-balance sheet liabilities        
Long-term debt 229,340 227,402    
Total liabilities 2,089,182 2,014,088    
Consolidated VIEs        
On-balance sheet assets        
Trading account assets 5,798 6,521    
Loans and leases 43,850 48,929    
Allowance for loan and lease losses (912) (1,016)    
All other assets 337 1,721    
Total assets 49,073 56,155    
On-balance sheet liabilities        
Long-term debt 10,944 9,873    
All other liabilities 30 37    
Total liabilities 11,716 10,222    
Home Equity Loan | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 908 1,522    
On-balance sheet assets        
Total assets 27 36    
Unconsolidated total assets of VIEs 1,813 2,432    
Home Equity Loan | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 85 112    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 133 177    
Allowance for loan and lease losses (5) (9)    
All other assets 4 6    
Total assets 132 174    
On-balance sheet liabilities        
Short-term borrowings 0 0    
Long-term debt 55 76    
All other liabilities 0 0    
Total liabilities 55 76    
Home Equity Loan | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 0 0    
Debt securities carried at fair value 27 36    
Held-to-maturity securities 0 0    
Home Equity Loan | Junior Lien | Unconsolidated VIEs        
On-balance sheet assets        
All other assets 0 0    
Credit Card | 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 | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 18,800 24,337    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 29,906 32,554    
Allowance for loan and lease losses (901) (988)    
All other assets 136 1,385    
Total assets 29,141 32,951    
On-balance sheet liabilities        
Short-term borrowings 0 0    
Long-term debt 10,321 8,598    
All other liabilities 20 16    
Total liabilities 10,341 8,614    
Residual interests 11,000 15,600    
Credit Card | 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 | Junior Lien | Unconsolidated VIEs        
On-balance sheet assets        
All other assets 0 0    
Resecuritization Trusts | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 7,647 8,204    
On-balance sheet assets        
Total assets 7,647 8,204    
Unconsolidated total assets of VIEs 16,949 19,281    
Resecuritization Trusts | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 128 628    
On-balance sheet assets        
Trading account assets 366 1,557    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 0 0    
Total assets 366 1,557    
On-balance sheet liabilities        
Short-term borrowings 0 0    
Long-term debt 238 929    
All other liabilities 0 0    
Total liabilities 238 929    
Resecuritization Trusts | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 1,419 869    
Debt securities carried at fair value 1,337 1,661    
Held-to-maturity securities 4,891 5,644    
Resecuritization Trusts | Junior Lien | Unconsolidated VIEs        
On-balance sheet assets        
All other assets 0 30    
Municipal Bond Trusts | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 2,150 1,631    
On-balance sheet assets        
Total assets 26 33    
Unconsolidated total assets of VIEs 2,829 2,287    
Municipal Bond Trusts | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,540 1,453    
On-balance sheet assets        
Trading account assets 1,553 1,452    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 1 1    
Total assets 1,554 1,453    
On-balance sheet liabilities        
Short-term borrowings 742 312    
Long-term debt 12 0    
All other liabilities 0 0    
Total liabilities 754 312    
Municipal Bond Trusts | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 26 33    
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        
All other assets $ 0 $ 0