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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Change in Accounting Estimate [Line Items]        
Total income tax expense (benefit)(1) $ 613 $ (279) [1] $ 1,995 [1]  
Effective tax rate 20.00% 14.70% 18.40%  
U.S. federal income tax rate 21.00%      
Impact of IRS Notice 2023-55 $ 7      
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability (99)      
Deferred Tax Assets, Tax Deferred Expense $ 542 $ 925    
U.S. federal income tax rate 21.00%      
DRD constituting non-taxable investment income $ 62 78 $ 115  
Non-taxable investment income $ 162 86 292  
Percent of income tax expense (benefit) 5.00%      
Income (loss) from domestic operations $ 1,341 (2,262) 8,889  
Income (loss) from foreign operations 1,731 369 $ 1,946  
Brazil Full Inclusion        
Change in Accounting Estimate [Line Items]        
Tax adjustment impact $ 11 (12)    
Japan Statutory Tax Rate        
Change in Accounting Estimate [Line Items]        
Effective tax rate 28.00%      
Brazil Statutory Tax Rate        
Change in Accounting Estimate [Line Items]        
Effective tax rate 40.00%     45.00%
Deferred Tax Assets, Tax Deferred Expense   $ 201    
Office of the Tax Commissioner, Bermuda        
Change in Accounting Estimate [Line Items]        
Effective tax rate 15.00%      
Deferred Tax Assets, Tax Deferred Expense $ 403      
[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.