Segment Information (Reconciliation Of Revenue From Segments To Consolidated) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total revenues	$ 18,784	$ 19,230	$ 17,439
Annuities Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	4,774	5,002	4,455
Retirement Plan Services Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	1,273	1,324	1,213
Life Insurance Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	7,156	8,137	7,516
Group Protection Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	5,303	4,996	4,793
Other Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	159	180	185
Excluded Realized Gain (Loss), Pre-Tax [Member]
Segment Reporting Information [Line Items]
Total revenues	135	(411)	(721)
Amortization Of DFEL Associated With Benefit Ratio Unlocking, Pre-Tax [Member]
Segment Reporting Information [Line Items]
Total revenues	$ (16)	$ 2	$ (2)