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Derivatives and Hedging Activities - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative assets after effects of bilateral collateral and master netting agreements $ 13  
Derivative liabilities after effects of bilateral collateral and master netting agreements 1  
Derivative assets not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses 168  
Derivative liabilities not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses 1,300  
Reclassify of after-tax net losses on derivative instruments from AOCI 324  
Reclassification of net losses related to terminated cash flow hedges from AOCI to income $ 189  
Maximum length of time over which forecasted transactions are hedged, years 4 years 7 days  
Cash collateral netted against derivative assets $ 408 $ 10
Collateral netted against derivative liabilities 64 626
Gross exposure on derivatives, after taking into account the effects of bilateral collateral and master netting agreements 703  
Net exposure on derivatives, after taking into account, the effects of bilateral collateral and master netting agreements 65  
Over-collateralization on derivatives to broker-dealers and banks, after the application of master netting agreements and collateral 47  
Additional collateral held in the form of securities 18  
Default reserve associated with uncollateralized contracts 7  
Gross exposure on derivatives after taking into account effects of master netting agreements 128  
Net exposure on derivatives with clients after application of master netting agreements collateral and related reserve 115  
Net liability position totaled $ 1 $ 2