CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Investments:
Cost or Amortized Cost	$ 39,952	$ 38,963
Fixed maturities, allowance for credit loss	18	40
Equity securities, cost	1,546	1,456
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 16	$ 26
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, Value, Issued	$ 2	$ 3
Common stock, shares authorized (in shares)	1,800,000,000	1,800,000,000
Common stock, shares issued (in shares)	248,467,051	269,360,973
Treasury stock, shares (in shares)	50,000	150,000
Preferred Stock, Value, Issued