Investments (Details) - Impairment Charges - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investment Information
Fixed maturities credit impairment charges	$ 2	$ 15	$ 4
Other investments credit impairment charges	0	40	0
Total investments credit impairment charges	2	55	4
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities [Member]
Investment Information
Fixed maturities credit impairment charges	0	0	0
Obligations of states, municipalities and political subdivisions [Member]
Investment Information
Fixed maturities credit impairment charges	0	0	0
Debt securities issued by foreign governments [Member]
Investment Information
Fixed maturities credit impairment charges	0	0	0
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member]
Investment Information
Fixed maturities credit impairment charges	0	0	0
All other corporate bonds [Member]
Investment Information
Fixed maturities credit impairment charges	2	15	4
Redeemable preferred stock [Member]
Investment Information
Fixed maturities credit impairment charges	$ 0	$ 0	$ 0