CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Investments:
Fixed maturities, amortized cost	$ 43,113	$ 42,615
Fixed maturities, allowance for credit loss	20	16
Equity securities, cost	1,027	1,015
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 35	$ 35
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)	222,421,077	222,268,150
Treasury stock, shares (in shares)	335,123	100,000