Segment Information (Reconciliation Of Assets From Segments To Consolidated) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total assets	$ 343,142	$ 334,217
Annuities [Member]
Segment Reporting Information [Line Items]
Total assets	172,978	167,377
Retirement Plan Services [Member]
Segment Reporting Information [Line Items]
Total assets	42,874	41,900
Life Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	96,168	94,536
Group Protection [Member]
Segment Reporting Information [Line Items]
Total assets	9,780	9,780
Other Operations [Member]
Segment Reporting Information [Line Items]
Total assets	$ 21,342	$ 20,624