v3.26.3
FAIR VALUE MEASUREMENTS - Fair Value Measurement Inputs and Valuation Techniques (Details)
$ in Millions
Sep. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 60,915 $ 64,121
Equity securities 986 887
Total assets 70,257 72,805
Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 4,377 3,357
Equity securities 176 160
Total assets 4,553 3,517
Adjusted cost valuation technique | Level 3 | Private financials    
Fair Value Measurement Inputs and Valuation Techniques    
Equity securities 176 160
Municipalities    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 1,662 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 6,128 4,366
Mortgage- and asset-backed securities | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 3,410 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 $ 3,410 $ 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] 84.29 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] 104.60 106.70
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] 97.00 100.42
Public utilities    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 6,582 $ 7,174
Public utilities | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 822 876
Public utilities | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 822 $ 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] 0.0708 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] 0.0179 0.0163
Sovereign and supranational    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 372 $ 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 9,027 9,244
Banks/financial institutions | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 0 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   9
Other corporate    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 23,799 26,398
Other corporate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale 128 159
Other corporate | Discounted cash flow technique | Level 3 | Credit spreads    
Fair Value Measurement Inputs and Valuation Techniques    
Fixed maturity securities, available-for-sale $ 128 $ 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] 0.0384 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] 0.0216 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