Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Fair Value & Net Carrying Value	$ 5,175	$ 4,507
Available for sale, Due after 1 year through 5 years, Fair Value & Net Carrying Value	36,243	33,446
Available for sale, Due after 5 years through 10 years, Fair Value & Net Carrying Value	27,636	26,901
Available for sale, Due after 10 years, Fair Value & Net Carrying Value	18,568	18,261
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	87,622	83,115
Available for sale, Mortgage backed securities, Fair Value & Net Carrying Value	28,497	27,248
Available for sale, Fair Value	$ 116,119	$ 110,363