Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed maturies, available for sale, amortized cost	$ 10,736	$ 10,193
Fixed maturities, available for sale, allowance for expected credit losses	$ 11	$ 9
Common Stock, par value (USD per share)	$ 0	$ 0
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Shares, Outstanding	85,204,006	84,920,965