v3.26.1
Investments - Amortized Cost and Fair Values of Fixed Maturity Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale $ 45,406 $ 44,617
Cost or Amortized Cost, Fixed maturities trading 291 633
Cost or Amortized Cost, Total fixed maturity securities 45,697 45,250
Gross Unrealized Gains 882 1,089
Gross Unrealized Losses 2,396 2,286
Allowance for Credit Losses 63 69
Estimated Fair Value, Fixed maturities available-for-sale 43,829 43,351
Estimated Fair Value, Fixed maturities trading 291 633
Total fixed maturities 44,120 43,984
Corporate and other bonds    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 25,722 25,484
Gross Unrealized Gains 513 682
Gross Unrealized Losses 964 881
Allowance for Credit Losses 16 28
Estimated Fair Value, Fixed maturities available-for-sale 25,255 25,257
States, municipalities and political subdivisions    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 9,257 8,870
Gross Unrealized Gains 305 303
Gross Unrealized Losses 727 742
Allowance for Credit Losses
Estimated Fair Value, Fixed maturities available-for-sale 8,835 8,431
Residential mortgage-backed    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 4,235 4,011
Gross Unrealized Gains 31 50
Gross Unrealized Losses 385 366
Allowance for Credit Losses
Estimated Fair Value, Fixed maturities available-for-sale 3,881 3,695
Commercial mortgage-backed    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 1,530 1,515
Gross Unrealized Gains 11 18
Gross Unrealized Losses 79 80
Allowance for Credit Losses 21 21
Estimated Fair Value, Fixed maturities available-for-sale 1,441 1,432
Other asset-backed    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 3,690 3,729
Gross Unrealized Gains 14 28
Gross Unrealized Losses 217 194
Allowance for Credit Losses 26 20
Estimated Fair Value, Fixed maturities available-for-sale 3,461 3,543
Asset-backed    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 9,455 9,255
Gross Unrealized Gains 56 96
Gross Unrealized Losses 681 640
Allowance for Credit Losses 47 41
Estimated Fair Value, Fixed maturities available-for-sale 8,783 8,670
U.S. Treasury and obligations of government-sponsored enterprises    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 242 236
Gross Unrealized Gains 1
Gross Unrealized Losses 3 3
Allowance for Credit Losses
Estimated Fair Value, Fixed maturities available-for-sale 239 234
Foreign government    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 722 764
Gross Unrealized Gains 8 7
Gross Unrealized Losses 21 20
Allowance for Credit Losses
Estimated Fair Value, Fixed maturities available-for-sale 709 751
Redeemable preferred stock    
Amortized Cost and Fair Values of Fixed Maturity Securities [Abstract]    
Cost or Amortized Cost, Fixed maturities available-for-sale 8 8
Gross Unrealized Gains
Gross Unrealized Losses
Allowance for Credit Losses
Estimated Fair Value, Fixed maturities available-for-sale $ 8 $ 8