v3.26.3
FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Assets:    
Fixed maturity securities, available-for-sale $ 60,915 $ 64,121
Equity securities 986 887
Other investments 2,549 1,373
Cash and cash equivalents 5,623 6,245
Asset derivatives 184 179
Total assets 70,257 72,805
Liabilities:    
Liability derivatives 890 972
Total liabilities 890 972
Foreign currency swaps    
Assets:    
Asset derivatives 37 45
Liabilities:    
Liability derivatives 743 765
Foreign currency forwards    
Assets:    
Asset derivatives 93 120
Liabilities:    
Liability derivatives 10 18
Foreign currency options    
Assets:    
Asset derivatives 22  
Liabilities:    
Liability derivatives 30  
Interest rate swaps    
Assets:    
Asset derivatives 32 14
Liabilities:    
Liability derivatives 107 189
Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 13,345 14,607
Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 1,662 1,930
Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 6,128 4,366
Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 6,582 7,174
Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 372 402
Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 9,027 9,244
Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 23,799 26,398
Level 1    
Assets:    
Fixed maturity securities, available-for-sale 12,846 13,921
Equity securities 810 727
Other investments 2,549 1,373
Cash and cash equivalents 5,623 6,245
Asset derivatives 0 0
Total assets 21,828 22,266
Liabilities:    
Total liabilities 0 0
Level 1 | Foreign currency swaps    
Assets:    
Asset derivatives 0 0
Liabilities:    
Liability derivatives 0 0
Level 1 | Foreign currency forwards    
Assets:    
Asset derivatives 0 0
Liabilities:    
Liability derivatives 0 0
Level 1 | Foreign currency options    
Assets:    
Asset derivatives 0  
Liabilities:    
Liability derivatives 0  
Level 1 | Interest rate swaps    
Assets:    
Asset derivatives 0 0
Liabilities:    
Liability derivatives 0 0
Level 1 | Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 12,795 13,921
Level 1 | Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 1 | Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 1 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 1 | Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 1 | Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 51 0
Level 1 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 2    
Assets:    
Fixed maturity securities, available-for-sale 43,692 46,843
Equity securities 0 0
Other investments 0 0
Cash and cash equivalents 0 0
Asset derivatives 184 179
Total assets 43,876 47,022
Liabilities:    
Total liabilities 890 972
Level 2 | Foreign currency swaps    
Assets:    
Asset derivatives 37 45
Liabilities:    
Liability derivatives 743 765
Level 2 | Foreign currency forwards    
Assets:    
Asset derivatives 93 120
Liabilities:    
Liability derivatives 10 18
Level 2 | Foreign currency options    
Assets:    
Asset derivatives 22  
Liabilities:    
Liability derivatives 30  
Level 2 | Interest rate swaps    
Assets:    
Asset derivatives 32 14
Liabilities:    
Liability derivatives 107 189
Level 2 | Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 550 686
Level 2 | Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 1,662 1,930
Level 2 | Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 2,718 2,072
Level 2 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 5,760 6,298
Level 2 | Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 355 383
Level 2 | Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 8,976 9,235
Level 2 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 23,671 26,239
Level 3    
Assets:    
Fixed maturity securities, available-for-sale 4,377 3,357
Equity securities 176 160
Other investments 0 0
Cash and cash equivalents 0 0
Asset derivatives 0 0
Total assets 4,553 3,517
Liabilities:    
Total liabilities 0 0
Level 3 | Foreign currency swaps    
Assets:    
Asset derivatives 0 0
Liabilities:    
Liability derivatives 0 0
Level 3 | Foreign currency forwards    
Assets:    
Asset derivatives 0 0
Liabilities:    
Liability derivatives 0 0
Level 3 | Foreign currency options    
Assets:    
Asset derivatives 0  
Liabilities:    
Liability derivatives 0  
Level 3 | Interest rate swaps    
Assets:    
Asset derivatives 0 0
Liabilities:    
Liability derivatives 0 0
Level 3 | Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 3 | Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 3 | Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 3,410 2,294
Level 3 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 822 876
Level 3 | Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 17 19
Level 3 | Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 0 9
Level 3 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale $ 128 $ 159