Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 30, 2022	Dec. 31, 2022	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Exposure to earthquake loss	$ 76.7
Reduction in premiums written, net			$ 128.0
Additional total refund requested to be provided to private automobile policyholders		$ 52.0