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FAIR VALUE MEASUREMENTS - Fair Value Measurement Inputs and Valuation Techniques (Detail) $ in Millions | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | $ 73,290 | $ 75,741
Equity securities |  | 1,088 | 1,091
Assets, fair value |  | 80,325 | 82,924
Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 1,781 | 1,778
Equity securities |  | 248 | 209
Assets, fair value |  | 2,029 | 1,987
Adjustd cost | Level 3 | Private Financials |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Equity securities |  | 248 | 209
Mortgage- and asset-backed securities |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 3,086 | 2,146
Mortgage- and asset-backed securities | Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 772 | 343
Mortgage- and asset-backed securities | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | $ 772 | $ 343
Mortgage- and asset-backed securities | Lower Limit | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [1] | 84.81 | 97.38
Mortgage- and asset-backed securities | Upper Limit | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [1] | 105.89 | 106.71
Mortgage- and asset-backed securities | Weighted Average | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input |  | 99.39 | 102.98
Public utilities |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | $ 7,592 | $ 7,666
Public utilities | Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 253 | 497
Public utilities | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | $ 253 |
Public utilities | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  |  | $ 497
Public utilities | Lower Limit | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [1] | 94.34 |
Public utilities | Lower Limit | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [2] |  | 0.0128
Public utilities | Upper Limit | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [1] | 102.99 |
Public utilities | Upper Limit | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [2] |  | 0.0286
Public utilities | Weighted Average | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input |  | 96.46 |
Public utilities | Weighted Average | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input |  |  | 0.0192
Sovereign and supranational |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | $ 537 | $ 834
Sovereign and supranational | Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 30 | 37
Sovereign and supranational | Consensus pricing valuation technique | Level 3 | Offered Quote |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 30 | 37
Banks/financial institutions |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 8,835 | 9,299
Banks/financial institutions | Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 78 | 159
Banks/financial institutions | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 78 | $ 159
Banks/financial institutions | Lower Limit | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [2] |  | 0.0067
Banks/financial institutions | Upper Limit | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [2] |  | 0.0188
Banks/financial institutions | Weighted Average | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input |  |  | 0.0113
Other corporate |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 28,342 | $ 28,362
Other corporate | Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | 648 | 742
Other corporate | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Available for sale, fixed maturity securities |  | $ 648 | $ 742
Other corporate | Lower Limit | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [2] | 0.0069 | 0.0066
Other corporate | Upper Limit | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input | [2] | 0.0423 | 0.0647
Other corporate | Weighted Average | Discounted cash flow technique | Level 3 | Credit Spread |  |  |
Fair Value Measurement Inputs and Valuation Technique |  |  |
Debt securities, available-for-sale, measurement input |  | 0.0206 | 0.0191
[1] | Represents prices for securities where the Company receives unadjusted broker quotes and for which there is no transparency into the providers' valuation techniques.
[2] | Actual or equivalent credit spreads in basis points.

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