Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 23,345	$ 23,107
Fixed maturities, Allowance for Credit Loss	4	0
Equity securities, cost	73	73
Mortgage loans on real estate valuation allowance	0	0
Securities pledged, amortized costs	$ 848	$ 749
Common stock, par value	$ 50	$ 50
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	55,000	55,000
Common stock, shares outstanding	55,000	55,000