CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Investments
Amortized Cost of Fixed Maturity Securities	$ 37,669.7	$ 37,386.7
Debt Securities, Available-for-sale, Allowance for credit losses for Fixed Maturity Securities	4.1	0.0
Financing Receivable, Allowance for Credit Losses, Mortgage Loans	7.9	8.3
Other Assets
Accounts Receivable, after Allowance for Credit Loss	35.0	34.2
Reinsurance Recoverable, Allowance for Credit Loss	$ 2.3	$ 2.3
Stockholders' Equity
Common Stock, Par Value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, Shares Authorized	725,000,000	725,000,000
Common Stock, Shares Issued	308,030,461	307,334,853
Treasury Stock, Shares at Cost	106,163,793	104,820,670