v3.26.3
Investments - Investment Portfolio by Major Security Type (Detail) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 97,844 $ 92,709 $ 89,762
Gross Unrealized Gains 23 901 1,099
Gross Unrealized Losses (3,478) (753) (850)
Net Holding Period Gains (Losses) (17) 14 13
Total available-for-sale securities $ 94,372 $ 92,871 $ 90,024
% of Total Fair Value 95.10% 95.40% 95.20%
Equity securities, at Fair Value      
Cost $ 1,121 $ 1,238 $ 1,262
Gross Unrealized Gains 0 0 0
Gross Unrealized Losses 0 0 0
Net Holding Period Gains (Losses) 3,704 3,264 3,223
Fair Value $ 4,825 $ 4,502 $ 4,485
% of Total Fair Value 4.90% 4.60% 4.80%
Debt and Equity Securities, at Fair Value      
Cost $ 98,965 $ 93,947 $ 91,024
Gross Unrealized Gains 23 901 1,099
Gross Unrealized Losses (3,478) (753) (850)
Net Holding Period Gains (Losses) 3,687 3,278 3,236
Fair Value $ 99,197 $ 97,373 $ 94,509
% of Total Fair Value 100.00% 100.00% 100.00%
Unsettled security transactions, payable $ 1,160 $ 200 $ 523
Total fair value of non-insurance subsidiary portfolio 5,800 13,000 4,900
Nonredeemable preferred stocks      
Equity securities, at Fair Value      
Cost 212 419 454
Gross Unrealized Gains 0 0 0
Gross Unrealized Losses 0 0 0
Net Holding Period Gains (Losses) (19) (15) (16)
Fair Value $ 193 $ 404 $ 438
% of Total Fair Value 0.20% 0.40% 0.50%
Common equities      
Equity securities, at Fair Value      
Cost $ 909 $ 819 $ 808
Gross Unrealized Gains 0 0 0
Gross Unrealized Losses 0 0 0
Net Holding Period Gains (Losses) 3,723 3,279 3,239
Fair Value $ 4,632 $ 4,098 $ 4,047
% of Total Fair Value 4.70% 4.20% 4.30%
Total fixed maturities      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 95,719 $ 82,704 $ 88,247
Gross Unrealized Gains 23 901 1,099
Gross Unrealized Losses (3,478) (753) (850)
Net Holding Period Gains (Losses) (17) 14 13
Total available-for-sale securities $ 92,247 $ 82,866 $ 88,509
% of Total Fair Value 93.00% 85.10% 93.60%
Total fixed maturities | U.S. government      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 43,865 $ 43,114 $ 51,021
Gross Unrealized Gains 0 541 731
Gross Unrealized Losses (2,271) (357) (413)
Net Holding Period Gains (Losses) 0 0 0
Total available-for-sale securities $ 41,594 $ 43,298 $ 51,339
% of Total Fair Value 41.90% 44.50% 54.30%
Total fixed maturities | State and local government      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 3,988 $ 3,342 $ 3,320
Gross Unrealized Gains 0 19 20
Gross Unrealized Losses (153) (58) (65)
Net Holding Period Gains (Losses) 0 0 0
Total available-for-sale securities $ 3,835 $ 3,303 $ 3,275
% of Total Fair Value 3.90% 3.40% 3.50%
Total fixed maturities | Foreign government      
Debt Securities, Available-for-Sale, at Fair Value      
Cost   $ 17 $ 16
Gross Unrealized Gains   0 0
Gross Unrealized Losses   0 0
Net Holding Period Gains (Losses)   0 0
Total available-for-sale securities   $ 17 $ 16
% of Total Fair Value   0.00% 0.00%
Total fixed maturities | Corporate and other debt      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 23,856 $ 19,773 $ 18,621
Gross Unrealized Gains 16 273 270
Gross Unrealized Losses (580) (68) (86)
Net Holding Period Gains (Losses) (17) 13 12
Total available-for-sale securities $ 23,275 $ 19,991 $ 18,817
% of Total Fair Value 23.50% 20.50% 19.90%
Total fixed maturities | Residential mortgage-backed      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 4,654 $ 3,152 $ 2,979
Gross Unrealized Gains 0 28 26
Gross Unrealized Losses (95) (6) (6)
Net Holding Period Gains (Losses) 0 1 1
Total available-for-sale securities $ 4,559 $ 3,175 $ 3,000
% of Total Fair Value 4.60% 3.30% 3.20%
Total fixed maturities | Commercial mortgage-backed      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 8,174 $ 6,194 $ 5,916
Gross Unrealized Gains 3 12 17
Gross Unrealized Losses (268) (233) (247)
Net Holding Period Gains (Losses) 0 0 0
Total available-for-sale securities $ 7,909 $ 5,973 $ 5,686
% of Total Fair Value 8.00% 6.10% 6.00%
Total fixed maturities | Other asset-backed      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 11,182 $ 7,112 $ 6,374
Gross Unrealized Gains 4 28 35
Gross Unrealized Losses (111) (31) (33)
Net Holding Period Gains (Losses) 0 0 0
Total available-for-sale securities $ 11,075 $ 7,109 $ 6,376
% of Total Fair Value 11.10% 7.30% 6.70%
Short-term investments      
Debt Securities, Available-for-Sale, at Fair Value      
Cost $ 2,125 $ 10,005 $ 1,515
Gross Unrealized Gains 0 0 0
Gross Unrealized Losses 0 0 0
Net Holding Period Gains (Losses) 0 0 0
Total available-for-sale securities $ 2,125 $ 10,005 $ 1,515
% of Total Fair Value 2.10% 10.30% 1.60%