CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Cash sold in subsidiary transaction		$ 4.2	$ 0.0
Cash acquired from acquisition		44.9	0.0
Restricted cash balance	$ 71.0	71.0	0.0	$ 0.7	$ 12.2
Gain (Loss) on Fair Value Adjustment of Surplus Notes	(15.8)	(15.8)	0.0
Other Operations
Cash sold in subsidiary transaction		0.0	$ 0.8
Gain (Loss) on Fair Value Adjustment of Surplus Notes	$ 0.0	$ 0.0