Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Dec. 01, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Total impairment loss		$ 49.6
Amortization of definite lived intangible assets		48.6	$ 53.7	$ 87.0
Goodwill derecognized	$ 0.3
Non-Core Operations
Goodwill [Line Items]
Goodwill, Impairment Loss, Net of Tax		$ (45.5)
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Reserve National Insurance Company
Goodwill [Line Items]
Total impairment loss	$ 11.4