Segment Information (Reconciliation Of Revenue From Segments To Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 4,696	$ 4,689
Excluded Realized Gain (Loss), Pre-Tax [Member]
Segment Reporting Information [Line Items]
Total revenues	210	162
Annuities Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	1,122	1,097
Retirement Plan Services Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	314	323
Life Insurance Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	1,715	1,819
Group Protection Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	1,302	1,253
Other Operations [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 33	$ 35