Reinsurance (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Mar. 31, 2021
Reinsurance Retention Policy
Catastrophe bond, face value	$ 275.0	$ 400.0
Catastrophe
Reinsurance Retention Policy
Retention amount	12.5
Earthquake
Reinsurance Retention Policy
XOL reinsurance, protection	2,080.0
Hurricane
Reinsurance Retention Policy
XOL reinsurance, protection	$ 900.0