Annual report pursuant to Section 13 and 15(d)

Derivatives - Designated Fair Value Hedged Assets (Liabilities) (Details)

v3.20.4
Derivatives - Designated Fair Value Hedged Assets (Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]    
Hedged liability, long-term debt, carrying value $ (150,556) $ (162,389)
Hedged liability, long-term debt, cumulative fair value adjustments (8,910) (8,685)
Amortized cost basis of portfolios used in hedging relationships 34,600  
Hedged asset, fair value edge, last-of-layer, amount 7,000  
Total AFS debt securities    
Derivative [Line Items]    
Hedged asset, available-for-sale debt securities, carrying value 116,252 1,654
Hedged asset, available-for-sale debt securities, cumulative fair value adjustments 114 64
Total trading account assets    
Derivative [Line Items]    
Hedged asset, available-for-sale debt securities, carrying value 427 0
Hedged asset, available-for-sale debt securities, cumulative fair value adjustments 15 0
Interest rate risk on long-term debt    
Derivative [Line Items]    
(Increase) decrease in liability (3,700) 1,300
Interest rate risk on AFS securities    
Derivative [Line Items]    
Available-for-sale securities from discontinued hedging relationships cumulative increase (decrease) $ (69) $ 8