Segment Information (Reconciliation of Assets From Segments to Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Schedule Of Segment Reporting And Reconciliation [Line Items]
Total assets	$ 343,555	$ 335,663
Life Insurance Segment [Member]
Schedule Of Segment Reporting And Reconciliation [Line Items]
Total assets	97,466	97,412
Annuities Segment [Member]
Schedule Of Segment Reporting And Reconciliation [Line Items]
Total assets	173,558	165,711
Group Protection Segment [Member]
Schedule Of Segment Reporting And Reconciliation [Line Items]
Total assets	9,450	9,828
Retirement Plan Services Segment [Member]
Schedule Of Segment Reporting And Reconciliation [Line Items]
Total assets	41,821	42,117
Other Operations [Member]
Schedule Of Segment Reporting And Reconciliation [Line Items]
Total assets	$ 21,260	$ 20,595