Segment Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 10,059	$ 17,557	$ 18,512
Other Operations
Segment Reporting Information [Line Items]
Total revenues	(778)	133	158
Revenue adjustments from annuity and life insurance product features
Segment Reporting Information [Line Items]
Total revenues	99	872	818
Credit loss-related adjustments
Segment Reporting Information [Line Items]
Total revenues	(74)	(129)	109
Investment gains (losses)
Segment Reporting Information [Line Items]
Total revenues	(4,080)	19	654
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans
Segment Reporting Information [Line Items]
Total revenues	(22)	588	165
GLB rider fees ceded to LNBAR
Segment Reporting Information [Line Items]
Total revenues	(923)	(932)	(888)
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	2,625	4,102	4,258
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	6,362	6,344	6,938
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	5,560	5,303	4,994
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	$ 1,290	$ 1,257	$ 1,306