CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Investments:
Fixed maturities, amortized cost	$ 40,928	$ 39,952
Fixed maturities, allowance for credit loss	17	18
Equity securities, cost	1,496	1,546
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 16	$ 16
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,800,000,000	1,800,000,000
Common stock, shares issued (in shares)	248,596,343	248,467,051
Treasury stock, shares (in shares)	2,195,656	50,000