Segment Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 4,056	$ 4,017
Other Operations
Segment Reporting Information [Line Items]
Revenues	26	38
Revenue adjustments from annuity and life insurance product features
Segment Reporting Information [Line Items]
Revenues	169	(91)
Credit loss-related adjustments, after-tax
Segment Reporting Information [Line Items]
Revenues	(1)	(21)
Investment gains (losses), after-tax
Segment Reporting Information [Line Items]
Revenues	(56)	(55)
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans
Segment Reporting Information [Line Items]
Revenues	48	(11)
GLB rider fees ceded to LNBAR
Segment Reporting Information [Line Items]
Revenues	(230)	(234)
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,178	1,043
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,181	1,638
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,424	1,388
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	$ 317	$ 322