Segment Information (Reconciliation of Net Investment Income From Segments to Consolidated) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Investment Income [Abstract]
Total net investment income	$ 5,511	$ 6,115	$ 5,510
Annuities Segment [Member]
Net Investment Income [Abstract]
Total net investment income	1,461	1,401	1,272
Retirement Plan Services Segment [Member]
Net Investment Income [Abstract]
Total net investment income	975	992	933
Life Insurance Segment [Member]
Net Investment Income [Abstract]
Total net investment income	2,585	3,209	2,823
Group Protection Segment [Member]
Net Investment Income [Abstract]
Total net investment income	333	366	330
Other Operations [Member]
Net Investment Income [Abstract]
Total net investment income	$ 157	$ 147	$ 152