v3.26.1
FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Fixed maturity securities, available-for-sale $ 62,848 $ 64,121
Equity securities 925 887
Other investments 2,815 1,373
Cash and cash equivalents 6,120 6,245
Asset derivatives 183 179
Total assets 72,891 72,805
Liabilities:    
Liability derivatives 1,072 972
Total liabilities 1,072 972
Foreign currency swaps    
Assets:    
Asset derivatives 42 45
Liabilities:    
Liability derivatives 887 765
Foreign currency forwards    
Assets:    
Asset derivatives 124 120
Liabilities:    
Liability derivatives 19 18
Foreign currency options    
Assets:    
Asset derivatives 17  
Liabilities:    
Liability derivatives 59  
Interest rate swaps    
Assets:    
Asset derivatives   14
Liabilities:    
Liability derivatives 107 189
Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 13,567 14,607
Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 1,764 1,930
Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 5,725 4,366
Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 6,954 7,174
Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 374 402
Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 9,218 9,244
Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 25,246 26,398
Level 1    
Assets:    
Fixed maturity securities, available-for-sale 13,062 13,921
Equity securities 767 727
Other investments 2,815 1,373
Cash and cash equivalents 6,120 6,245
Asset derivatives 0 0
Total assets 22,764 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
Liabilities:    
Liability derivatives 0 0
Level 1 | Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 13,011 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 46,025 46,843
Equity securities 0 0
Other investments 0 0
Cash and cash equivalents 0 0
Asset derivatives 183 179
Total assets 46,208 47,022
Liabilities:    
Total liabilities 1,072 972
Level 2 | Foreign currency swaps    
Assets:    
Asset derivatives 42 45
Liabilities:    
Liability derivatives 887 765
Level 2 | Foreign currency forwards    
Assets:    
Asset derivatives 124 120
Liabilities:    
Liability derivatives 19 18
Level 2 | Foreign currency options    
Assets:    
Asset derivatives 17  
Liabilities:    
Liability derivatives 59  
Level 2 | Interest rate swaps    
Assets:    
Asset derivatives   14
Liabilities:    
Liability derivatives 107 189
Level 2 | Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 556 686
Level 2 | Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 1,764 1,930
Level 2 | Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 2,972 2,072
Level 2 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 6,102 6,298
Level 2 | Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 357 383
Level 2 | Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 9,163 9,235
Level 2 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 25,111 26,239
Level 3    
Assets:    
Fixed maturity securities, available-for-sale 3,761 3,357
Equity securities 158 160
Other investments 0 0
Cash and cash equivalents 0 0
Asset derivatives 0 0
Total assets 3,919 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
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 2,753 2,294
Level 3 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 852 876
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 4 9
Level 3 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale $ 135 $ 159