Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Fair Value & Net Carrying Value	$ 4,938	$ 4,507
Available for sale, Due after 1 year through 5 years, Fair Value & Net Carrying Value	33,342	33,446
Available for sale, Due after 5 years through 10 years, Fair Value & Net Carrying Value	27,027	26,901
Available for sale, Due after 10 years, Fair Value & Net Carrying Value	18,300	18,261
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	83,607	83,115
Available for sale, Mortgage backed securities, Fair Value & Net Carrying Value	27,516	27,248
Available for sale, Fair Value	$ 111,123	$ 110,363