Segment Information - Reconciliation of Income (Loss) from Operations by Segment to Consolidated Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Net income (loss)	$ 657	$ (928)
Other Operations
Segment Reporting Information [Line Items]
Net income (loss)	(107)	(52)
Net annuity product features, after-tax
Segment Reporting Information [Line Items]
Net income (loss)	783	(821)
Net life insurance product features, after-tax
Segment Reporting Information [Line Items]
Net income (loss)	(104)	(95)
Credit loss-related adjustments, after-tax
Segment Reporting Information [Line Items]
Net income (loss)	(1)	(17)
Investment gains (losses), after-tax
Segment Reporting Information [Line Items]
Net income (loss)	(45)	(43)
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans
Segment Reporting Information [Line Items]
Net income (loss)	38	(9)
GLB rider fees ceded to LNBAR, after-tax
Segment Reporting Information [Line Items]
Net income (loss)	(182)	(185)
Transaction and integration costs related to mergers, acquisitions and divestitures, after-tax
Segment Reporting Information [Line Items]
Net income (loss)	(8)	0
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	223	217
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	(51)	(32)
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	79	71
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Net income (loss)	$ 32	$ 38