Segment Reporting - Geographic Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 3,122.3	$ 3,009.5	$ 2,707.1
Property, equipment and software, net	628.3	826.7
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	2,341.7	2,253.4	2,027.8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	2,209.2	2,157.0	1,948.0
Property, equipment and software, net	487.9	652.8
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	626.6	632.9	585.2
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	521.6	542.3	583.6
Property, equipment and software, net	116.7	146.1
APJ
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	154.0	123.2	94.1
Other Foreign Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	391.5	310.2	$ 175.5
Property, equipment and software, net	$ 23.7	$ 27.8