v3.25.2
FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Assets:    
Fixed maturity securities, available-for-sale $ 68,879 $ 65,269
Equity securities 882 796
Other investments 2,375 1,599
Cash and cash equivalents 6,965 6,229
Asset derivatives 90 240
Total assets 79,191 74,133
Liabilities:    
Liability derivatives 925 933
Total liabilities 925 933
Foreign currency swaps    
Assets:    
Asset derivatives 45 55
Liabilities:    
Liability derivatives 589 604
Foreign currency forwards    
Assets:    
Asset derivatives 29 185
Liabilities:    
Liability derivatives 61  
Foreign currency options    
Assets:    
Asset derivatives 2  
Interest rate swaps    
Assets:    
Asset derivatives 14  
Liabilities:    
Liability derivatives 275 329
Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 17,753 17,846
Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 2,074 2,034
Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 4,526 3,563
Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 7,474 7,045
Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 435 416
Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 9,827 8,956
Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 26,790 25,409
Level 1    
Assets:    
Fixed maturity securities, available-for-sale 16,975 17,088
Equity securities 715 639
Other investments 2,375 1,599
Cash and cash equivalents 6,965 6,229
Asset derivatives 0 0
Total assets 27,030 25,555
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  
Level 1 | Foreign currency options    
Assets:    
Asset 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 16,975 17,088
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 0 0
Level 1 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 0 0
Level 2    
Assets:    
Fixed maturity securities, available-for-sale 48,995 46,114
Equity securities 0 0
Other investments 0 0
Cash and cash equivalents 0 0
Asset derivatives 90 240
Total assets 49,085 46,354
Liabilities:    
Total liabilities 925 933
Level 2 | Foreign currency swaps    
Assets:    
Asset derivatives 45 55
Liabilities:    
Liability derivatives 589 604
Level 2 | Foreign currency forwards    
Assets:    
Asset derivatives 29 185
Liabilities:    
Liability derivatives 61  
Level 2 | Foreign currency options    
Assets:    
Asset derivatives 2  
Level 2 | Interest rate swaps    
Assets:    
Asset derivatives 14  
Liabilities:    
Liability derivatives 275 329
Level 2 | Government and agencies    
Assets:    
Fixed maturity securities, available-for-sale 778 758
Level 2 | Municipalities    
Assets:    
Fixed maturity securities, available-for-sale 2,074 2,034
Level 2 | Mortgage- and asset-backed securities    
Assets:    
Fixed maturity securities, available-for-sale 2,604 2,407
Level 2 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 6,682 6,398
Level 2 | Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 412 393
Level 2 | Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 9,818 8,946
Level 2 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale 26,627 25,178
Level 3    
Assets:    
Fixed maturity securities, available-for-sale 2,909 2,067
Equity securities 167 157
Other investments 0 0
Cash and cash equivalents 0 0
Asset derivatives 0 0
Total assets 3,076 2,224
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  
Level 3 | Foreign currency options    
Assets:    
Asset 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 1,922 1,156
Level 3 | Public utilities    
Assets:    
Fixed maturity securities, available-for-sale 792 647
Level 3 | Sovereign and supranational    
Assets:    
Fixed maturity securities, available-for-sale 23 23
Level 3 | Banks/financial institutions    
Assets:    
Fixed maturity securities, available-for-sale 9 10
Level 3 | Other corporate    
Assets:    
Fixed maturity securities, available-for-sale $ 163 $ 231