Separate Accounts (Schedule Of Reconciliation Of Separate Account Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	$ 145,810	$ 143,536
UL and Other [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	22,642	20,920
Variable Annuities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	105,192	105,573	$ 136,665
Retirement Plan Services [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	17,928	16,996	$ 21,068
Other Operations [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	48	47
Reinsurance Agreement [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	$ 42	$ 42