v3.26.1
Insurance Liabilities (Future Policy Benefits - SOP) (Details) - ULSG - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Additional Liability, Long-Duration Insurance [Line Items]        
Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change $ 10,216 $ 9,173 $ 10,077 $ 8,986
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Cash Flow and Reinsurance 10,467 9,423 10,298 9,277
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) of Actual Variance from Expected Experience     45 63
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Reinsurance, after Cash Flow Change     $ 10,343 $ 9,340
Additional Liability, Long-Duration Insurance, Interest Income (Expense) 126 113    
Additional Liability, Long-Duration Insurance, Net Premium Collected 122 116    
Additional Liability, Long-Duration Insurance, Benefit Payment (124) (146)    
AOCI, Liability for Future Policy Benefit, before Tax (251) (250)    
Additional Liability, Long-Duration Insurance, Reinsurance Recoverable, after Allowance 1,818 1,551    
Additional Liability, Long-Duration Insurance, after Reinsurance $ 8,398 $ 7,622    
Additional Liability, Long-Duration Insurance, Weighted-Average Duration 6 years 7 months 6 days 6 years 7 months 6 days    
Additional Liability, Long-Duration Insurance, Weighted-Average Interest Accretion Rate 4.95% 4.95%    
Additional Liability, Long-Duration Insurance, Gross Premium Income $ 257 $ 257