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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 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets: |  |
Fixed maturity securities, available-for-sale | $ 65,269 | $ 73,290
Equity securities | 796 | 1,088
Other investments | 1,599 | 1,304
Cash and cash equivalents | 6,229 | 4,306
Asset derivatives | 240 | 337
Total assets | 74,133 | 80,325
Liabilities: |  |
Liability derivatives | 933 | 1,430
Total liabilities | 933 | 1,430
Foreign currency swaps |  |
Assets: |  |
Asset derivatives | 55 | 86
Liabilities: |  |
Liability derivatives | 604 | 507
Foreign currency forwards |  |
Assets: |  |
Asset derivatives | 185 | 238
Liabilities: |  |
Liability derivatives |  | 504
Foreign currency options |  |
Assets: |  |
Asset derivatives |  | 2
Interest rate swaps |  |
Assets: |  |
Asset derivatives |  | 11
Liabilities: |  |
Liability derivatives | 329 | 419
Government and agencies |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 17,846 | 22,600
Municipalities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,034 | 2,298
Mortgage- and asset-backed securities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 3,563 | 3,086
Public utilities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 7,045 | 7,592
Sovereign and supranational |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 416 | 537
Banks/financial institutions |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 8,956 | 8,835
Other corporate |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 25,409 | 28,342
Level 1 |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 17,088 | 21,700
Equity securities | 639 | 840
Other investments | 1,599 | 1,304
Cash and cash equivalents | 6,229 | 4,306
Asset derivatives | 0 | 0
Total assets | 25,555 | 28,150
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 | 17,088 | 21,700
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 | 46,114 | 49,809
Equity securities | 0 | 0
Other investments | 0 | 0
Cash and cash equivalents | 0 | 0
Asset derivatives | 240 | 337
Total assets | 46,354 | 50,146
Liabilities: |  |
Total liabilities | 933 | 1,430
Level 2 | Foreign currency swaps |  |
Assets: |  |
Asset derivatives | 55 | 86
Liabilities: |  |
Liability derivatives | 604 | 507
Level 2 | Foreign currency forwards |  |
Assets: |  |
Asset derivatives | 185 | 238
Liabilities: |  |
Liability derivatives |  | 504
Level 2 | Foreign currency options |  |
Assets: |  |
Asset derivatives |  | 2
Level 2 | Interest rate swaps |  |
Assets: |  |
Asset derivatives |  | 11
Liabilities: |  |
Liability derivatives | 329 | 419
Level 2 | Government and agencies |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 758 | 900
Level 2 | Municipalities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,034 | 2,298
Level 2 | Mortgage- and asset-backed securities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,407 | 2,314
Level 2 | Public utilities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 6,398 | 7,339
Level 2 | Sovereign and supranational |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 393 | 507
Level 2 | Banks/financial institutions |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 8,946 | 8,757
Level 2 | Other corporate |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 25,178 | 27,694
Level 3 |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 2,067 | 1,781
Equity securities | 157 | 248
Other investments | 0 | 0
Cash and cash equivalents | 0 | 0
Asset derivatives | 0 | 0
Total assets | 2,224 | 2,029
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 | 1,156 | 772
Level 3 | Public utilities |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 647 | 253
Level 3 | Sovereign and supranational |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 23 | 30
Level 3 | Banks/financial institutions |  |
Assets: |  |
Fixed maturity securities, available-for-sale | 10 | 78
Level 3 | Other corporate |  |
Assets: |  |
Fixed maturity securities, available-for-sale | $ 231 | $ 648

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