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FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Assets: |  |
Fixed maturity securities, available-for-sale | $ 67,144 | $ 65,269
Equity securities | 764 | 796
Other investments | 2,259 | 1,599
Cash and cash equivalents | 5,231 | 6,229
Asset derivatives | 148 | 240
Total assets | 75,546 | 74,133
Liabilities: |  |
Liability derivatives | 985 | 933
Total liabilities | 985 | 933
Foreign currency swaps |  |
Assets: |  |
Asset derivatives | 49 | 55
Liabilities: |  |
Liability derivatives | 642 | 604
Foreign currency forwards |  |
Assets: |  |
Asset derivatives | 92 | 185
Liabilities: |  |
Liability derivatives | 39 |
Foreign currency options |  |
Assets: |  |
Asset derivatives | 2 |
Interest rate swaps |  |
Assets: |  |
Asset derivatives | 5 |
Liabilities: |  |
Liability derivatives | 304 | 329
Government and agencies |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 17,817 | 17,846
Municipalities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,055 | 2,034
Mortgage- and asset-backed securities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 4,048 | 3,563
Public utilities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 7,221 | 7,045
Sovereign and supranational |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 426 | 416
Banks/financial institutions |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 9,361 | 8,956
Other corporate |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 26,216 | 25,409
Level 1 |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 16,972 | 17,088
Equity securities | 604 | 639
Other investments | 2,259 | 1,599
Cash and cash equivalents | 5,231 | 6,229
Asset derivatives | 0 | 0
Total assets | 25,066 | 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 | 16,972 | 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 | 47,642 | 46,114
Equity securities | 0 | 0
Other investments | 0 | 0
Cash and cash equivalents | 0 | 0
Asset derivatives | 148 | 240
Total assets | 47,790 | 46,354
Liabilities: |  |
Total liabilities | 985 | 933
Level 2 | Foreign currency swaps |  |
Assets: |  |
Asset derivatives | 49 | 55
Liabilities: |  |
Liability derivatives | 642 | 604
Level 2 | Foreign currency forwards |  |
Assets: |  |
Asset derivatives | 92 | 185
Liabilities: |  |
Liability derivatives | 39 |
Level 2 | Foreign currency options |  |
Assets: |  |
Asset derivatives | 2 |
Level 2 | Interest rate swaps |  |
Assets: |  |
Asset derivatives | 5 |
Liabilities: |  |
Liability derivatives | 304 | 329
Level 2 | Government and agencies |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 845 | 758
Level 2 | Municipalities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,055 | 2,034
Level 2 | Mortgage- and asset-backed securities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,445 | 2,407
Level 2 | Public utilities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 6,465 | 6,398
Level 2 | Sovereign and supranational |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 402 | 393
Level 2 | Banks/financial institutions |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 9,351 | 8,946
Level 2 | Other corporate |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 26,079 | 25,178
Level 3 |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,530 | 2,067
Equity securities | 160 | 157
Other investments | 0 | 0
Cash and cash equivalents | 0 | 0
Asset derivatives | 0 | 0
Total assets | 2,690 | 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 | 1,603 | 1,156
Level 3 | Public utilities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 756 | 647
Level 3 | Sovereign and supranational |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 24 | 23
Level 3 | Banks/financial institutions |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 10 | 10
Level 3 | Other corporate |  |
Assets: |  |
Fixed maturity securities, available-for-sale | $ 137 | $ 231

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