v3.21.2
Derivatives and Hedging Activities - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Derivative [Line Items]          
Gross Fair Value of Derivative Asset Contracts Not Enforceable $ 18,040   $ 18,040   $ 20,600
Gross Fair Value of Derivative Liability Contracts Not Enforceable 17,490   17,490   22,980
Net Gains / (Losses) on Derivative assets and liabilities (289) $ 6 (385) $ 2,250  
Net Realized Gains / (Losses) on Derivative assets and liabilities 119 70 73 136  
Net Unrealized Gains / (Losses) on Derivative assets and liabilities (408) (76) (458) 2,110  
Maximum Payout/Notional Amount of Written Credit Derivative 553,091   553,091   515,850
Maximum Payout/Notional Amount of Purchased Credit Derivatives 597,830   597,830   558,180
Net purchased protection notional value of credit derivatives 44,740   44,740   42,330
Foreign Currency Denominated Debt Designated As Foreign Currency Hedge 5,250   5,250   $ 4,970
Gains losses on hedges reclassified from accumulated other comprehensive income to earnings net   57   57  
Commodity Futures Contracts [Member]          
Derivative [Line Items]          
Trading cash instrument at fair value 2,030   2,030    
Trading cash instruments assets commodities amortized cost 2,090   2,090    
Derivative Contracts Accounted for as Hedges [Member]          
Derivative [Line Items]          
Gains losses on hedges reclassified from accumulated other comprehensive income to earnings net   208   208  
Net Investment Hedging [Member]          
Derivative [Line Items]          
Gains (losses) on hedge investments reclassified from accumulated other comprehensive income to earnings gross   (151)   (151)  
Market making [Member]          
Derivative [Line Items]          
Net Gains / (Losses) on Derivative assets and liabilities (307) 55 (407) 2,290  
Other Principal Transactions [Member]          
Derivative [Line Items]          
Net Gains / (Losses) on Derivative assets and liabilities $ 18 $ (61) $ 22 $ (45)