Product and Geographic Information - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Premiums	$ 12,749	$ 11,638
Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total deposits	53,689	34,796
Premiums	12,749	11,638	$ 0
Total premiums and deposits, net of ceded	66,438	46,434
Indexed annuities \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total deposits	12,012	11,212
Fixed Annuity \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total deposits	34,594	15,322
Payout annuities without life contingencies \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total deposits	188	490
Funding agreements \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total deposits	6,893	7,770
Other deposits \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total deposits	2	2
Payout annuities with life contingencies
Segment Reporting, Asset Reconciling Item [Line Items]
Premiums	10,504	11,606
Payout annuities with life contingencies \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Premiums	10,504	11,606
Whole life
Segment Reporting, Asset Reconciling Item [Line Items]
Premiums	2,214	0
Whole life \| Retirement Services
Segment Reporting, Asset Reconciling Item [Line Items]
Premiums	$ 2,245	$ 32