CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investments:
Allowance for credit losses	$ 56.0	$ 7.6
Fixed maturities, available for sale, amortized cost	23,384.2	21,867.6
Mortgage loans, allowance for credit losses	8.0	5.6
Investments held by variable interest entities, allowance for credit losses	5.5	3.7
Investments held by variable interest entities, amortized cost	1,134.2	1,206.8
Reinsurance receivables, allowance for credit losses	$ 2.0	$ 3.0
Shareholders' equity:
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	8,000,000,000	8,000,000,000
Common stock, shares issued (in shares)	114,343,070	120,377,152
Common stock, shares outstanding (in shares)	114,343,070	120,377,152