v3.26.1
Insurance Liabilities (Future Policy Benefits Information by Product) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Liability for Future Policy Benefit, before Reinsurance $ 31,773 $ 31,834    
Future policy benefits 31,773   $ 32,025  
Term and Whole Life Insurance        
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]        
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change 2,389 2,787 2,504 $ 2,808
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance 2,660 3,107 2,747 3,161
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     (30) (4)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change     2,717 3,157
Liability for Future Policy Benefit, Expected Net Premium, Issuance 2 5    
Liability for Future Policy Benefit, Expected Net Premium, Interest Income 24 28    
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected (83) (83)    
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax (271) (320)    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change 4,893 5,311 5,053 5,325
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance 5,415 5,903 5,513 5,989
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements     0 1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     (43) 2
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change     5,470 5,992
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance 2 6    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense 50 55    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (107) (150)    
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax (522) (592)    
Liability for Future Policy Benefit, before Reinsurance 2,504 2,524    
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance 26 27    
Future policy benefits $ 2,478 $ 2,497    
Liability for Future Policy Benefit, Weighted-Average Duration 7 years 7 years 6 months    
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate 3.92% 3.93%    
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate 5.25% 5.24%    
Liability for Future Policy Benefit, Gross Premium Income $ 119 $ 140    
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance 4,983 5,780    
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance 3,724 4,263    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance 7,245 8,022    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance 5,415 5,903    
Income Annuities        
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]        
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change 0 0 0 0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance 0 0 0 0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     0 0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change     0 0
Liability for Future Policy Benefit, Expected Net Premium, Issuance 0 0    
Liability for Future Policy Benefit, Expected Net Premium, Interest Income 0 0    
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected 0 0    
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax 0 0    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change 3,952 3,810 3,985 3,763
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance 4,299 4,160 4,272 4,161
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements     0 0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     (9) (21)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change     4,263 4,140
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance 100 81    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense 42 40    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (106) (101)    
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax (347) (350)    
Liability for Future Policy Benefit, before Reinsurance 3,952 3,810    
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance 31 31    
Future policy benefits $ 3,921 $ 3,779    
Liability for Future Policy Benefit, Weighted-Average Duration 7 years 7 months 6 days 7 years 10 months 24 days    
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate 4.13% 4.05%    
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate 5.37% 5.31%    
Liability for Future Policy Benefit, Gross Premium Income $ 139 $ 108    
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance 0 0    
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance 0 0    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance 6,041 5,859    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance 4,299 4,160    
Structured Settlement and Pension Risk Transfer Annuities        
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]        
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change 0 0 0 0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance 0 0 0 0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     0 0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change     0 0
Liability for Future Policy Benefit, Expected Net Premium, Issuance 0 0    
Liability for Future Policy Benefit, Expected Net Premium, Interest Income 0 0    
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected 0 0    
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax 0 0    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change 5,836 6,109 6,009 6,118
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance 6,570 6,798 6,635 6,876
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements     0 0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     (1) (19)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change     $ 6,634 $ 6,857
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance 0 0    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense 72 74    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (136) (133)    
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax (734) (689)    
Liability for Future Policy Benefit, before Reinsurance 5,836 6,109    
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance 54 59    
Future policy benefits $ 5,782 $ 6,050    
Liability for Future Policy Benefit, Weighted-Average Duration 11 years 6 months 11 years 6 months    
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate 4.47% 4.46%    
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate 5.67% 5.54%    
Liability for Future Policy Benefit, Gross Premium Income $ 0 $ 0    
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance 0 0    
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance 0 0    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance 12,684 13,173    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance $ 6,570 $ 6,798