CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Amortized cost, fixed maturities	$ 312.2	$ 294.3
Amortized cost, short term investments	7.9	14.8
Allowance for premiums receivable	7.2	9.8
Allowance for credit loss	$ 0.2	$ 0.1
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	100.0	100.0
Preferred stock, shares issued (in shares)	14.1	14.1
Preferred stock, shares outstanding (in shares)	14.1	14.1
Preferred stock, liquidation preference	$ 126.5	$ 126.5
Class A Shares
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000.0	1,000.0
Common stock, shares issued (in shares)	11.2	11.1
Common stock, shares outstanding (in shares)	11.2	11.1
Class B Shares
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	269.0	269.0
Common stock, shares issued (in shares)	4.0	4.0
Common stock, shares outstanding (in shares)	4.0	4.0