Investments - Schedule of Loans by Maturity (Details) $ in Millions	Sep. 30, 2022 USD ($) security loan
Investments, Debt and Equity Securities [Abstract]
Greater than One Year and Less than Three	$ 54.8
Greater than Three Years and Less than Five Years	33.8
Greater than Five Years and Less than Seven Years	20.4
Greater than Seven Years and Less than Ten Years	49.8
Cost	$ 158.8
Greater than One Year and Less than Three | security	10
Greater than Three Years and Less than Five Years | security	6
Greater than Five Years and Less than Seven Years | security	4
Greater than Seven Years and Less than Ten Years | security	8
Loan Count | loan	28