Segment Information (Reconciliation Of Revenue From Segments To Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 2,929	$ 5,577	$ 6,743	$ 10,297
Operating Segments [Member] | Annuities [Member]
Segment Reporting Information [Line Items]
Total revenues	1,190	1,097	2,331	2,244
Operating Segments [Member] | Retirement Plan Services [Member]
Segment Reporting Information [Line Items]
Total revenues	334	315	661	633
Operating Segments [Member] | Life Insurance [Member]
Segment Reporting Information [Line Items]
Total revenues	1,760	1,705	3,517	3,435
Operating Segments [Member] | Group Protection [Member]
Segment Reporting Information [Line Items]
Total revenues	1,400	1,323	2,788	2,626
Operating Segments [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	46	34	90	73
Investment and Reinsurance Related Realized Gain (Loss), After-Tax [Member]
Segment Reporting Information [Line Items]
Total revenues	(838)	(25)	(1,034)	(25)
Change in Fair Value of GLB and GDB Hedge Instruments, After-Tax [Member]
Segment Reporting Information [Line Items]
Total revenues	(896)	1,099	(1,372)	1,173
Index Product Net Derivative, After-Tax [Member]
Segment Reporting Information [Line Items]
Total revenues	$ (67)	$ 29	$ (238)	$ 138