Investments - Schedule of Other Investments by Asset Type (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments [Line Items]
Other investments	$ 866	$ 1,055
Bank loans, net
Investments [Line Items]
Other investments	187	224
Real estate
Investments [Line Items]
Other investments	677	709
Policy loans
Investments [Line Items]
Other investments	0	119
Other
Investments [Line Items]
Other investments	$ 2	$ 3