Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 23,107	$ 22,860
Equity securities, cost	73	45
Mortgage loans on real estate valuation allowance	0	1
Securities pledged, amortized costs	$ 749	$ 867
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