Reinsurance - Schedule of Assets in Support of Reserves (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	$ 81,900	$ 82,300
Trading securities	2,005	2,321
Equity securities	294	306
Mortgage loans on real estate	20,940	18,873
Derivative investments	9,512	6,305
Other investments	6,272	4,757
Cash and invested cash	4,505	3,193	$ 2,499	$ 2,331
Accrued investment income	993	982
Other assets	10,192	10,139
Lincoln Pinehurst Reinsurance Company (Bermuda)
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	9,287
Mortgage loans on real estate	1,941
Derivative investments	190
Accrued investment income	97
Total	11,515
Athene Holding Ltd.
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	142	177
Trading securities	1,385	1,556
Equity securities	42	58
Mortgage loans on real estate	232	288
Derivative investments	46	43
Other investments	54	41
Cash and invested cash	147	582
Accrued investment income	18	23
Other assets	1	6
Total	$ 2,067	$ 2,774