v3.26.1
Investments (Investment Income Net of Related Expenses) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue $ 1,767 $ 1,284
Investment expense (66) (52)
Investment income, net of related expenses 1,701 1,232
Available-for-sale Securities [Member]    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 1,369 1,063
Equity securities    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 4 2
Mortgage Loans on Real Estate [Member]    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 157 119
Policy loans    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 43 18
Funds withheld at interest    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 108 66
Short-term Investments [Member]    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 33 36
Partnership Interest    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue 54 (15)
Other invested assets    
Major Categories Of Investment Income Net of Expenses [Line Items]    
Investment revenue $ (1) $ (5)