Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Fair Value & Net Carrying Value	$ 4,507	$ 4,729
Available for sale, Due after 1 year through 5 years, Fair Value & Carrying Value	33,446	33,573
Available for sale, Due after 5 years through 10 years, Fair Value & Carrying Value	26,901	28,480
Available for sale, Due after 10 years, Fair Value & Carrying Value	18,261	17,731
Available for sale, Maturity, Allocated and Single Maturity Date, Fair Value	83,115	84,513
Available for sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	83,115	84,513
Available for sale, Mortgage backed securities, Fair Value	27,248	22,058
Available for sale, Fair Value	$ 110,363	$ 106,571