CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Investments:
Fixed maturities, amortized cost	$ 41,899	$ 41,102
Fixed maturities, allowance for credit loss	2	1
Equity securities, cost	1,082	1,161
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 24	$ 24
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)	236,270,711	236,159,866
Treasury stock, shares (in shares)	8,372,525	198,875