Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Fixed maturities, available for sale, amortized cost	$ 10,610	$ 10,736
Fixed maturities, available for sale, allowance for expected credit losses	$ 20	$ 11
Common Stock, par value (USD per share)	$ 0	$ 0
Common Stock, shares authorized (shares)	200,000,000	200,000,000
Common Stock, shares outstanding (shares)	84,135,710	85,204,006