Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Fair Value & Net Carrying Value	$ 4,553	$ 4,749
Available for sale, Due after 1 year through 5 years, Fair Value & Net Carrying Value	36,333	35,611
Available for sale, Due after 5 years through 10 years, Fair Value & Net Carrying Value	31,062	31,514
Available for sale, Due after 10 years, Fair Value & Net Carrying Value	20,163	20,082
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	92,111	91,956
Available for sale, Mortgage backed securities, Fair Value & Net Carrying Value	31,322	30,724
Available for sale, Fair Value	$ 123,433	$ 122,680