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Derivative Instruments and Hedging Activities - Protection Purchased with CDS (Details) - Protection Purchased - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
CDS    
Credit Derivatives    
Notional $ 339,000 $ 348,000
Fair Value Asset (Liability) 998 (2,352)
Single name    
Credit Derivatives    
Notional 140,000 126,000
Fair Value Asset (Liability) (33) (1,338)
Index and basket    
Credit Derivatives    
Notional 173,000 204,000
Fair Value Asset (Liability) 1,248 (563)
Tranched index and basket    
Credit Derivatives    
Notional 26,000 18,000
Fair Value Asset (Liability) $ (217) $ (451)