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Derivative Instruments and Hedging Activities - Summary of Pre-tax (Gains) Losses From Derivatives Not Designated in as Hedging Instruments (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Net Revenues [Member] | Not Designated as Hedging Instrument [Member]        
Derivative [Line Items]        
Gain (Loss) on Derivative Instruments, Net, Pretax $ (4,164) $ (3,878) $ (7,983) $ (7,539)
Net Revenues [Member] | Not Designated as Hedging Instrument, Trading [Member]        
Derivative [Line Items]        
Gain (Loss) on Derivative Instruments, Net, Pretax 0 0 0 0
Net Revenues [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]        
Derivative [Line Items]        
Gain (Loss) on Derivative Instruments, Net, Pretax 2 (4) (10) 2
Financial expenses [Member] | Not Designated as Hedging Instrument [Member]        
Derivative [Line Items]        
Gain (Loss) on Derivative Instruments, Net, Pretax 241 268 491 528
Financial expenses [Member] | Not Designated as Hedging Instrument, Trading [Member]        
Derivative [Line Items]        
Gain (Loss) on Derivative Instruments, Net, Pretax (27) $ (36) (37) (50)
Financial expenses [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]        
Derivative [Line Items]        
Gain (Loss) on Derivative Instruments, Net, Pretax $ 0   $ 0 $ 0