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Derivatives - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Gains (losses) on interest rate swaps expected to be reclassified from AOCI to net earnings over the next 12 months. $ 6    
Interest rate swaps | Designated as hedging instrument | Net investment income      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Reclassification from accumulated other comprehensive income (3) $ (7)  
Interest rate swaps | Cash flow hedging | Designated as hedging instrument      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, notional amount 926   $ 1,050
Collateral receivable supporting swaps 21   27
Total return swap | Not designated as hedging instrument      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Collateral receivable supporting swaps $ 5   $ 4