Investments - Mortgage Loans (Details) - Commercial Real Estate - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Mortgage Loans on Real Estate [Line Items]
New mortgage loans	$ 168	$ 121	$ 223	$ 180
Mortgage loans fully repaid	3	39	17	74
Mortgage loans foreclosed	$ 0	$ 0	$ 0	$ 0