v3.25.4
Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments $ 194 $ 392
Policyholder account balance (135,904) (125,818)
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt   (24)
Long-term debt (1,476) (2,164)
Fair Value | Mortgage loans on real estate    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 21,636 19,523
Fair Value | Other investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 6,429 6,272
Fair Value | Policy loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 2,617 2,465
Fair Value | Policyholder account balances and other liabilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance (36,693) (29,689)
Fair Value | Policyholder Account Balances, Funding Agreements    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance (3,778)  
Fair Value | Funds withheld reinsurance-related liabilities – excluding embedded derivatives    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Funds withheld reinsurance-related liabilities – excluding embedded derivatives (31,132) (27,538)
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt   (24)
Long-term debt (1,426) (2,173)
Carrying Amount | Mortgage loans on real estate    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 22,139 20,940
Carrying Amount | Other investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 6,429 6,272
Carrying Amount | Policy loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 2,617 2,465
Carrying Amount | Policyholder account balances and other liabilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance (43,774) (39,137)
Carrying Amount | Policyholder Account Balances, Funding Agreements    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance (3,749)  
Carrying Amount | Funds withheld reinsurance-related liabilities – excluding embedded derivatives    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Funds withheld reinsurance-related liabilities – excluding embedded derivatives (31,132) (27,538)
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt   0
Long-term debt 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value | Mortgage loans on real estate    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value | Other investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value | Policy loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value | Policyholder account balances and other liabilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value | Policyholder Account Balances, Funding Agreements    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance 0  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value | Funds withheld reinsurance-related liabilities – excluding embedded derivatives    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Funds withheld reinsurance-related liabilities – excluding embedded derivatives 0 0
Significant Observable Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 193 369
Significant Observable Inputs (Level 2) | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt   (24)
Long-term debt (1,476) (2,164)
Significant Observable Inputs (Level 2) | Fair Value | Mortgage loans on real estate    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 0 0
Significant Observable Inputs (Level 2) | Fair Value | Other investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 542 1,061
Significant Observable Inputs (Level 2) | Fair Value | Policy loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 2,617 2,465
Significant Observable Inputs (Level 2) | Fair Value | Policyholder account balances and other liabilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance 0 0
Significant Observable Inputs (Level 2) | Fair Value | Policyholder Account Balances, Funding Agreements    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance (3,778)  
Significant Observable Inputs (Level 2) | Fair Value | Funds withheld reinsurance-related liabilities – excluding embedded derivatives    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Funds withheld reinsurance-related liabilities – excluding embedded derivatives 0 0
Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 1 23
Significant Unobservable Inputs (Level 3) | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt   0
Long-term debt 0 0
Significant Unobservable Inputs (Level 3) | Fair Value | Mortgage loans on real estate    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 21,636 19,523
Significant Unobservable Inputs (Level 3) | Fair Value | Other investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 5,887 5,211
Significant Unobservable Inputs (Level 3) | Fair Value | Policy loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments – short-term investments 0 0
Significant Unobservable Inputs (Level 3) | Fair Value | Policyholder account balances and other liabilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance (36,693) (29,689)
Significant Unobservable Inputs (Level 3) | Fair Value | Policyholder Account Balances, Funding Agreements    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policyholder account balance 0  
Significant Unobservable Inputs (Level 3) | Fair Value | Funds withheld reinsurance-related liabilities – excluding embedded derivatives    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Funds withheld reinsurance-related liabilities – excluding embedded derivatives $ (31,132) $ (27,538)