Goodwill and Specifically Identifiable Intangible Assets (Changes In Carrying Amount Of Goodwill, By Reportable Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill Gross		$ 3,930	$ 3,930
Accumulated impairment as of beginning-of-year		(2,152)	(2,152)
Impairment
Net goodwill as of end-of-year	1,778	1,778
Annuities Segment [Member]
Goodwill [Roll Forward]
Goodwill Gross		1,040	1,040
Accumulated impairment as of beginning-of-year		(600)	(600)
Impairment
Net goodwill as of end-of-year	440	440
Retirement Plan Services Segment [Member]
Goodwill [Roll Forward]
Goodwill Gross		20	20
Impairment
Net goodwill as of end-of-year	20	20
Life Insurance Segment [Member]
Goodwill [Roll Forward]
Goodwill Gross		2,186	2,186
Accumulated impairment as of beginning-of-year		(1,552)	(1,552)
Impairment
Net goodwill as of end-of-year	634	634
Group Protection Segment [Member]
Goodwill [Roll Forward]
Goodwill Gross		684	$ 684
Impairment
Net goodwill as of end-of-year	$ 684	$ 684