Property, Equipment and Software, net - Schedule of Property, Equipment and Software, net (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property, equipment and software, at cost	$ 1,991.2	$ 2,010.9
Less: Accumulated depreciation	(1,407.9)	(1,420.7)
Property, equipment and software, net	594.0	601.0
Computers and equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software, at cost	1,123.7	1,142.9
Software
Property, Plant and Equipment [Line Items]
Property, equipment and software, at cost	446.4	448.1
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, equipment and software, at cost	7.5	10.2
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and software, at cost	413.6	409.7
Work in process
Property, Plant and Equipment [Line Items]
Work in process	$ 10.7	$ 10.8