CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturities, amortized cost	$ 39,293	$ 38,963
Fixed maturities, amortized cost, allowance for credit loss	43	40
Equity securities, cost	1,455	1,456
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 26	$ 26
Liabilities and 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)	269,472,042	269,360,973
Treasury stock, shares (in shares)	5,708,164	150,000