Segment Information (Reconciliation Of Assets From Segments To Consolidated) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total assets	$ 348,612	$ 334,217
Annuities [Member]
Segment Reporting Information [Line Items]
Total assets	177,686	167,377
Retirement Plan Services [Member]
Segment Reporting Information [Line Items]
Total assets	42,936	41,900
Life Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	97,306	94,536
Group Protection [Member]
Segment Reporting Information [Line Items]
Total assets	9,536	9,780
Other Operations [Member]
Segment Reporting Information [Line Items]
Total assets	$ 21,148	$ 20,624