v3.26.1
Investments (Details) - Allowance for Expected Credit Losses - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Allowance for expected credit losses [Roll Forward]    
Allowance for expected credit losses on fixed maturities classified as available-for-sale, balance, beginning of period $ 3  
Allowance for expected credit losses on fixed maturities classified as available-for-sale, balance, end of period 3  
Total net impairment charges, including credit impairments, reported in net realized investment gains (losses) in the consolidated statement of income $ 4 $ 2
Credit losses on fixed maturities recognized in the consolidated statement of income, as a percentage of the fixed maturity portfolio on a pre-tax basis (less than) 1.00% 1.00%
Credit losses on fixed maturities recognized in the consolidated statement of income, as a percentage of shareholders' equity on an after-tax basis (less than) 1.00% 1.00%
Corporate and all other bonds [Member]    
Allowance for expected credit losses [Roll Forward]    
Allowance for expected credit losses on fixed maturities classified as available-for-sale, balance, beginning of period $ 3 $ 2
Additions for expected credit losses on securities where no credit losses were previously recognized 0 2
Additions (reductions) for expected credit losses on securities where credit losses were previously recognized 0 0
Reductions due to sales/defaults of credit-impaired securities 0 0
Reductions for impairments of securities which the Company intends to sell or more likely than not will be required to sell 0 0
Allowance for expected credit losses on fixed maturities classified as available-for-sale, balance, end of period $ 3 $ 4