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Derivatives and Hedging Activities - Credit Derivatives Sold and Held (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Credit Derivatives [Line Items]    
Notional Amount $ 4 $ 1
Payment / Performance Risk 0.00% 0.00%
Other    
Credit Derivatives [Line Items]    
Notional Amount $ 4 $ 1
Average Term (Years) 10 years 8 months 8 days 15 years 2 months 1 day
Payment / Performance Risk 4.86% 5.10%