Segment Information - Supplemental Geographic and Customer Solution Set Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 536.0	$ 504.5
Finance & Risk
Segment Reporting Information [Line Items]
Revenue	311.2	295.6
Sales & Marketing
Segment Reporting Information [Line Items]
Revenue	224.8	208.9
Operating segments | North America
Segment Reporting Information [Line Items]
Revenue	367.3	339.4
Operating segments | North America | Finance & Risk
Segment Reporting Information [Line Items]
Revenue	202.2	190.5
Operating segments | North America | Sales & Marketing
Segment Reporting Information [Line Items]
Revenue	165.1	148.9
Operating segments | International
Segment Reporting Information [Line Items]
Revenue	168.7	169.9
Operating segments | International | Finance & Risk
Segment Reporting Information [Line Items]
Revenue	109.0	107.4
Operating segments | International | Sales & Marketing
Segment Reporting Information [Line Items]
Revenue	59.7	62.5
Corporate and other
Segment Reporting Information [Line Items]
Revenue	0.0	(4.8)
Corporate and other | Finance & Risk
Segment Reporting Information [Line Items]
Revenue	0.0	(2.3)
Corporate and other | Sales & Marketing
Segment Reporting Information [Line Items]
Revenue	$ 0.0	$ (2.5)