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Market Risk Benefits (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Market Risk Benefit [Line Items]      
Market Risk Benefit, Increase (Decrease) from Equity Market Change $ 10 $ (10) $ 58
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk 249 247  
Market Risk Benefit, Net Amount at Risk 258 247  
Insurance, Other [Member] | Americas [Member] | Other Segments      
Market Risk Benefit [Line Items]      
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change 249 247 262
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change 253 263 $ 254
Market Risk Benefit, Interest Expense 14 54  
Market Risk Benefit, Attributed Fee Collected 25 28  
Market Risk Benefit, Benefit Payment (1) (9)  
Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption 16 18  
Market Risk Benefit, Increase (Decrease) from Interest Rate Change (5) (175)  
Market Risk Benefit, Increase (Decrease) from Equity Market Change (52) 48  
Market Risk Benefit, Increase (Decrease) from Volatility (6) 19  
Market Risk Benefit, Increase (Decrease) from Other Assumption (15) 7  
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected 14 19  
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax (4) (16)  
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk 249 247  
Market Risk Benefit, Reinsurance Recoverable, after Allowance 0 0  
Market Risk Benefit, Net Amount at Risk $ 1,401 $ 1,630  
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age 71 years 66 years