Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Fair Value & Net Carrying Value	$ 4,536	$ 4,729
Available for sale, Due after 1 year through 5 years, Fair Value & Net Carrying Value	35,739	33,573
Available for sale, Due after 5 years through 10 years, Fair Value & Net Carrying Value	28,913	28,480
Available for sale, Due after 10 years, Fair Value & Net Carrying Value	19,603	17,731
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	88,791	84,513
Available for sale, Mortgage backed securities, Fair Value & Net Carrying Value	28,474	22,058
Available for sale, Fair Value	$ 117,265	$ 106,571