Segment Information - Reconciliation of Federal Income Tax Expense (Benefit) from Segments 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]
Federal income tax expense (benefit)	$ (396)	$ 367	$ 865
Other Operations
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(115)	(116)	(105)
Net annuity product features
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	14	867	427
Net life insurance product features
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(83)	5	0
Credit loss-related adjustments
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(17)	(27)	20
Investment gains (losses)
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(198)	4	141
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(168)	(11)	14
Transaction and integration costs related to mergers, acquisitions, and divestures
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(7)	0	(3)
Gain (loss) on modification or early extinguishment of debt
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	0	0	(2)
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	140	185	255
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	(72)	(587)	110
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	80	11	(44)
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Federal income tax expense (benefit)	$ 30	$ 36	$ 52