Future Contract Benefit (Summary Of Gross Premiums And Interest Accretion) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Traditional Life [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Gross assessments	$ 310	$ 303	$ 937	$ 897
Interest Accretion	35	34	106	100
Payout Annuities [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Gross assessments	16	49	88	92
Interest Accretion	21	21	64	63
UL and Other [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Gross assessments	337	690	1,794	2,097
Interest Accretion	197	175	573	446
Group Protection [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Gross assessments	874	852	2,645	2,523
Interest Accretion	$ 39	$ 33	$ 122	$ 111