Investments - Schedule of Other Investments by Asset Type (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Investments [Line Items]
Other investments	$ 1,004	$ 1,055
Bank loans, net
Investments [Line Items]
Other investments	164	224
Real estate
Investments [Line Items]
Other investments	717	709
Policy loans
Investments [Line Items]
Other investments	120	119
Derivatives
Investments [Line Items]
Other investments	1	1
Other
Investments [Line Items]
Other investments	$ 2	$ 2