v3.26.1
FAIR VALUE MEASUREMENTS - Fair Value Measurement Inputs and Valuation Techniques (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 62,848 $ 64,121
Equity securities 925 887
Total assets 72,891 72,805
Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 3,761 3,357
Equity securities 158 160
Total assets 3,919 3,517
Adjusted cost valuation technique | Level 3 | Private financials    
Fair Value Measurement Inputs and Valuation Techniques    
Equity securities 158 160
Municipalities    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 1,764 1,930
Municipalities | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 0 0
Mortgage- and asset-backed securities    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 5,725 4,366
Mortgage- and asset-backed securities | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 2,753 2,294
Mortgage- and asset-backed securities | Consensus pricing valuation technique | Level 3 | Offered quotes    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 2,753 $ 2,294
Mortgage- and asset-backed securities | Lower Limit | Consensus pricing valuation technique | Level 3 | Offered quotes    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [1] 86.79 88.75
Mortgage- and asset-backed securities | Upper Limit | Consensus pricing valuation technique | Level 3 | Offered quotes    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [1] 104.56 106.70
Mortgage- and asset-backed securities | Weighted Average | Consensus pricing valuation technique | Level 3 | Offered quotes    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [1] 99.31 100.42
Public utilities    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 6,954 $ 7,174
Public utilities | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 852 876
Public utilities | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 852 $ 876
Public utilities | Lower Limit | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [2] 0.0100 0.0100
Public utilities | Upper Limit | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [2] 0.0467 0.0391
Public utilities | Weighted Average | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [2] 0.0184 0.0163
Sovereign and supranational    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 374 $ 402
Sovereign and supranational | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 17 19
Sovereign and supranational | Consensus pricing valuation technique | Level 3 | Offered quotes    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 17 19
Banks/financial institutions    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 9,218 9,244
Banks/financial institutions | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 4 9
Banks/financial institutions | Adjusted cost valuation technique | Level 3 | Private financials    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 4 9
Other corporate    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 25,246 26,398
Other corporate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 135 159
Other corporate | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 135 $ 159
Other corporate | Lower Limit | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [2] 0.0075 0.0075
Other corporate | Upper Limit | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [2] 0.0380 0.0384
Other corporate | Weighted Average | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale, measurement input [2] 0.0205 0.0217
[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