Segment Information (Reconciliation Of Assets From Segments To Consolidated) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total assets	$ 338,411	$ 334,217
Annuities [Member]
Segment Reporting Information [Line Items]
Total assets	171,598	167,377
Retirement Plan Services [Member]
Segment Reporting Information [Line Items]
Total assets	41,558	41,900
Life Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	94,237	94,536
Group Protection [Member]
Segment Reporting Information [Line Items]
Total assets	9,389	9,780
Other Operations [Member]
Segment Reporting Information [Line Items]
Total assets	$ 21,629	$ 20,624