CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Investments
Amortized Cost of Fixed Maturity Securities	$ 34,861.7	$ 38,269.9
Debt Securities, Available-for-sale, Allowance for credit losses for Fixed Maturity Securities	15.2	2.8
Financing Receivable, Allowance for Credit Losses, Mortgage Loans	15.6	16.1
Other Assets
Premium Receivable, Allowance for Credit Loss	28.0	26.8
Reinsurance Recoverable, Allowance for Credit Loss	$ 1.5	$ 1.5
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	196,158,797	195,460,723
Treasury Stock, Common, Shares	27,196,645	16,871,752