Summary of Significant Accounting Policies - Summary of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment	$ 526.5	$ 584.9
Land
Property, Plant and Equipment [Line Items]
Property and equipment	0.4	0.4
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment	6.4	6.3
Furniture, Fixtures, and Autos
Property, Plant and Equipment [Line Items]
Property and equipment	148.5	166.4
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	127.3	130.1
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 243.9	$ 281.7