Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fixed maturities, allowance for credit losses	$ 12.6	$ 10.7
Receivables from policyholders, allowance for credit losses	$ 2.0	$ 2.9
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	63,576,249	63,840,442
Common stock, shares outstanding (in shares)	63,576,249	63,840,442
Consolidated Entity, Excluding VIE
Fixed maturities, at amortized cost	$ 7,484.3	$ 7,295.0
Fixed maturities, allowance for credit losses	12.6	10.7
Equity securities, at cost	262.5	197.1
Receivables from policyholders, allowance for credit losses	2.0	2.9
Variable Interest Entity, Primary Beneficiary
Fixed maturities, at amortized cost	$ 33.0	$ 1.7