Deferred Costs, Capitalized, Prepaid, and Other Assets (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Policy Acquisition Costs	$ 646.2	$ 690.1	$ 635.6	$ 688.0
Deferred Policy Acquisition Cost, Capitalization	322.3	363.0
Deferred Policy Acquisition Costs, Amortization Expense	(305.4)	(358.5)
Deferred Policy Acquisition Cost, Experience Adjustment	$ (6.3)	(2.4)
Effect of Retrospective Application of Accounting Standards Update 2018-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Weighted-Average Duration	15 years		15 years 7 months 6 days
Term Life Insurance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Policy Acquisition Cost, Capitalization	$ 27.7	33.0
Deferred Policy Acquisition Costs, Amortization Expense	(9.7)	(14.7)
Deferred Policy Acquisition Cost, Experience Adjustment	(6.3)	(2.4)
Property and Casualty Insurance Reserves
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Policy Acquisition Costs	230.0	254.9	$ 231.1	268.7
Deferred Policy Acquisition Cost, Capitalization	294.6	330.0
Deferred Policy Acquisition Costs, Amortization Expense	(295.7)	(343.8)
Deferred Policy Acquisition Cost, Experience Adjustment	0.0	0.0
Life & Health Insurance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Policy Acquisition Costs	$ 416.2	$ 435.2	$ 404.5	$ 419.3