Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Fixed maturities, available for sale, amortized cost	$ 9,059	$ 8,812
Fixed maturities, available for sale, allowance for expected credit losses	$ 10	$ 12
Common Stock, par value (USD per share)	$ 0	$ 0
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Shares, Outstanding	85,126,062	86,345,246