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	$ 11,645	$ 18,810	$ 17,715
Other Operations
Segment Reporting Information [Line Items]
Total revenues	(755)	156	181
Revenue adjustments from annuity and life insurance product features
Segment Reporting Information [Line Items]
Total revenues	(2,541)	1,009	(1,696)
Credit loss-related adjustments
Segment Reporting Information [Line Items]
Total revenues	(80)	(130)	110
Investment gains (losses)
Segment Reporting Information [Line Items]
Total revenues	(959)	20	658
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans
Segment Reporting Information [Line Items]
Total revenues	(802)	(52)	67
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	3,002	4,482	4,691
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	6,907	6,747	7,387
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	5,563	5,304	4,995
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	$ 1,310	$ 1,274	$ 1,322