Segment Information (Reconciliation Of Revenue From Segments To Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 3,577	$ 4,265	$ 8,841	$ 13,355
Investment and Reinsurance Related Realized gain (Loss) [Member]
Segment Reporting Information [Line Items]
Total revenues	268	192	154	725
GLB Rider Fees Ceded To LNBAR [Member]
Segment Reporting Information [Line Items]
Total revenues	(227)	(231)	(694)	(701)
Credit loss-related adjustments [Member]
Segment Reporting Information [Line Items]
Total revenues	(25)	(132)	(50)	(120)
Investment Gains (Losses) [Member]
Segment Reporting Information [Line Items]
Total revenues	(1,091)	13	(4,228)	4
Life Insurance Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	1,627	1,536	4,920	4,756
Annuities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	1,095	1,021	3,236	3,071
Group Protection [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	1,387	1,332	4,174	3,958
Retirement Plan Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	321	312	972	936
Other Operations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	32	28	106	93
Changes In Fair Value of Reinsurance-Related Embedded Derivatives Trading Securities and Certain Mortage Loans [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 190	$ 193	$ 251	$ 633