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
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Jan. 01, 2019
On-balance sheet assets        
Trading account assets $ 193,323 $ 229,826    
Debt securities carried at fair value 221,104 256,467    
Amortized Cost 254,764 215,730    
Total assets 2,619,954 2,434,079 $ 2,377,164  
Financing receivable, before credit loss allowance 1,050,785 983,426    
Allowance for loan and lease losses (15,766)   $ (9,577) $ (9,601)
Other assets 136,621 129,690    
On-balance sheet liabilities        
Long-term debt 256,712 240,856    
Total liabilities 2,355,036 2,169,269    
Consolidated VIEs        
On-balance sheet assets        
Trading account assets 5,405 5,811    
Total assets 41,478 44,381    
Financing receivable, before credit loss allowance 37,009 38,837    
Allowance for loan and lease losses (1,472) (807)    
Other assets 536 540    
On-balance sheet liabilities        
Long-term debt 6,787 8,718    
All other liabilities 39 22    
Total liabilities 7,973 10,915    
Home Equity | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 386 412    
On-balance sheet assets        
Total assets 10 11    
Unconsolidated total assets of VIEs 961 1,023    
Home Equity | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 73 64    
On-balance sheet assets        
Trading account assets 0 0    
Total assets 132 123    
Financing receivable, before credit loss allowance 111 122    
Allowance for loan and lease losses 17 (2)    
Other assets 4 3    
On-balance sheet liabilities        
Short-term borrowings 0 0    
Long-term debt 59 64    
All other liabilities 0 0    
Total liabilities 59 64    
Home Equity | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 0 0    
Debt securities carried at fair value 10 11    
Amortized Cost 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 17,392 17,915    
On-balance sheet assets        
Trading account assets 0 0    
Total assets 23,776 26,304    
Financing receivable, before credit loss allowance 25,156 26,985    
Allowance for loan and lease losses (1,483) (800)    
Other assets 103 119    
On-balance sheet liabilities        
Short-term borrowings 0 0    
Long-term debt 6,371 8,372    
All other liabilities 13 17    
Total liabilities 6,384 8,389    
Residual interests 11,000 10,500    
Credit Card | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 0 0    
Debt securities carried at fair value 0 0    
Amortized Cost 0 0    
Resecuritization Trusts | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 6,409 7,526    
On-balance sheet assets        
Total assets 6,409 7,526    
Unconsolidated total assets of VIEs 15,082 21,234    
Resecuritization Trusts | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 196 54    
On-balance sheet assets        
Trading account assets 214 73    
Total assets 214 73    
Financing receivable, before credit loss allowance 0 0    
Allowance for loan and lease losses 0 0    
Other assets 0 0    
On-balance sheet liabilities        
Short-term borrowings 0 0    
Long-term debt 18 19    
All other liabilities 0 0    
Total liabilities 18 19    
Resecuritization Trusts | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 1,262 2,188    
Debt securities carried at fair value 1,097 1,126    
Amortized Cost 4,050 4,212    
Municipal Bond Trusts | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 3,412 3,701    
On-balance sheet assets        
Total assets 213 0    
Unconsolidated total assets of VIEs 3,960 4,395    
Municipal Bond Trusts | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,966 2,656    
On-balance sheet assets        
Trading account assets 1,790 2,480    
Total assets 1,966 2,656    
Financing receivable, before credit loss allowance 0 0    
Allowance for loan and lease losses 0 0    
Other assets 176 176    
On-balance sheet liabilities        
Short-term borrowings 1,147 2,175    
Long-term debt 0 0    
All other liabilities 0 0    
Total liabilities 1,147 2,175    
Municipal Bond Trusts | Senior Lien | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 213 0    
Debt securities carried at fair value 0 0    
Amortized Cost $ 0 $ 0