Investments - Other investments by type (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Investments [Line Items]
Other investments	$ 1,718	$ 1,728
Bank loans, net
Investments [Line Items]
Other investments	667	686
Real estate
Investments [Line Items]
Other investments	825	813
Policy loans
Investments [Line Items]
Other investments	121	120
Derivatives
Investments [Line Items]
Other investments	0	1
Other
Investments [Line Items]
Other investments	$ 105	$ 108