Segment Information (Reconciliation Of Assets From Segments To Consolidated) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total assets	$ 387,301	$ 365,948
Annuities Segment [Member]
Segment Reporting Information [Line Items]
Total assets	201,732	184,678
Retirement Plan Services Segment [Member]
Segment Reporting Information [Line Items]
Total assets	47,625	45,372
Life Insurance Segment [Member]
Segment Reporting Information [Line Items]
Total assets	105,208	101,941
Group Protection Segment [Member]
Segment Reporting Information [Line Items]
Total assets	10,522	10,201
Other Operations [Member]
Segment Reporting Information [Line Items]
Total assets	$ 22,214	$ 23,756