Insurance Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Insurance Expenses [Abstract]
Commissions	$ 724.8	$ 817.6	$ 745.8
General Expenses	358.4	339.5	307.4
Taxes, Licenses and Fees	99.5	104.3	94.2
Total Costs Incurred	1,182.7	1,261.4	1,147.4
Policy Acquisition Costs:
Deferred	(691.5)	(772.6)	(693.4)
Amortized	705.3	684.3	641.8
Net Policy Acquisition Costs Amortized (Deferred)	13.8	(88.3)	(51.6)
Amortization of VOBA	4.1	45.0	4.7
Insurance Expenses	$ 1,200.6	$ 1,218.1	$ 1,100.5