Segment Information - Reconciliation of Income (Loss) from Operations by Segment to Consolidated Net Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net income (loss)	$ (1,788)	$ (1,675)	$ 3,297
Other Operations
Segment Reporting Information [Line Items]
Net income (loss)	(356)	(374)	(244)
Net annuity product features
Segment Reporting Information [Line Items]
Net income (loss)	1,295	416	1,866
Net life insurance product features
Segment Reporting Information [Line Items]
Net income (loss)	148	21	(1)
Credit loss-related adjustments
Segment Reporting Information [Line Items]
Net income (loss)	(58)	(102)	86
Investment gains (losses)
Segment Reporting Information [Line Items]
Net income (loss)	(3,210)	15	516
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans
Segment Reporting Information [Line Items]
Net income (loss)	(18)	465	130
GLB rider fees ceded to LNBAR, after-tax
Segment Reporting Information [Line Items]
Net income (loss)	(728)	(735)	(701)
Impairment of intangibles
Segment Reporting Information [Line Items]
Net income (loss)	0	(634)	0
Transaction and integration costs related to mergers, acquisitions, and divestures
Segment Reporting Information [Line Items]
Net income (loss)	(27)	0	(11)
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	840	948	1,089
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	(126)	(1,933)	497
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	297	40	(165)
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	$ 155	$ 198	$ 235