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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 | 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

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