Summary of Significant Accounting Policies - Summary of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment	$ 594.9	$ 614.7
Land
Property, Plant and Equipment [Line Items]
Property and equipment	0.5	0.5
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment	6.7	7.1
Furniture, Fixtures, and Autos
Property, Plant and Equipment [Line Items]
Property and equipment	166.5	167.1
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	132.7	133.8
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 288.5	$ 306.2