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Schedule V. Valuation and Qualifying Accounts (Schedule of valuation and qualifying accounts) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Insurance and reinsurance receivables      
Movement in valuation allowances and reserves [Roll Forward]      
Balance at Beginning of Period $ 50 $ 51 $ 50
Charged to Costs and Expenses 7 11 8
Charged to Other Accounts 0 0 0
Deductions (10) (12) (7)
Balance at End of Period 47 50 51
Mortgage loan receivables      
Movement in valuation allowances and reserves [Roll Forward]      
Balance at Beginning of Period 35 24 16
Charged to Costs and Expenses 0 0 0
Charged to Other Accounts 0 11 8
Deductions 0 0 0
Balance at End of Period 35 35 24
Fixed maturity securities      
Movement in valuation allowances and reserves [Roll Forward]      
Balance at Beginning of Period 16 1 18
Charged to Costs and Expenses 0 0 0
Charged to Other Accounts 43 44 4
Deductions (14) (29) (21)
Balance at End of Period $ 45 $ 16 $ 1