Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 1,475.2	$ 1,238.5	$ 1,177.2
Software and hosting solutions
Disaggregation of Revenue [Line Items]
Revenues	1,144.2	936.8	895.3
Professional services
Disaggregation of Revenue [Line Items]
Revenues	132.3	123.7	131.4
Data solutions
Disaggregation of Revenue [Line Items]
Revenues	186.9	162.6	129.4
Other
Disaggregation of Revenue [Line Items]
Revenues	11.8	15.4	21.1
Operating Segments | Software Solutions
Disaggregation of Revenue [Line Items]
Revenues	1,250.0	1,040.2	1,012.3
Operating Segments | Software Solutions | Software and hosting solutions
Disaggregation of Revenue [Line Items]
Revenues	1,107.2	902.7	863.1
Operating Segments | Software Solutions | Professional services
Disaggregation of Revenue [Line Items]
Revenues	130.8	123.4	130.7
Operating Segments | Software Solutions | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	2.7	1.2
Operating Segments | Software Solutions | Other
Disaggregation of Revenue [Line Items]
Revenues	9.3	12.9	18.5
Operating Segments | Data and Analytics
Disaggregation of Revenue [Line Items]
Revenues	225.2	198.7	165.4
Operating Segments | Data and Analytics | Software and hosting solutions
Disaggregation of Revenue [Line Items]
Revenues	37.0	34.1	32.2
Operating Segments | Data and Analytics | Professional services
Disaggregation of Revenue [Line Items]
Revenues	1.5	0.7	1.2
Operating Segments | Data and Analytics | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	184.2	161.4	129.4
Operating Segments | Data and Analytics | Other
Disaggregation of Revenue [Line Items]
Revenues	2.5	2.5	2.6
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues		(0.4)	(0.5)
Corporate and Other | Professional services
Disaggregation of Revenue [Line Items]
Revenues		(0.4)	(0.5)
Reportable Legal Entities | Servicing Software
Disaggregation of Revenue [Line Items]
Revenues	838.9	777.7	815.5
Reportable Legal Entities | Servicing Software | Software and hosting solutions
Disaggregation of Revenue [Line Items]
Revenues	760.0	700.1	726.1
Reportable Legal Entities | Servicing Software | Professional services
Disaggregation of Revenue [Line Items]
Revenues	78.9	77.6	84.3
Reportable Legal Entities | Servicing Software | Other
Disaggregation of Revenue [Line Items]
Revenues			5.1
Reportable Legal Entities | Origination Software
Disaggregation of Revenue [Line Items]
Revenues	411.1	262.5	196.8
Reportable Legal Entities | Origination Software | Software and hosting solutions
Disaggregation of Revenue [Line Items]
Revenues	347.2	202.6	137.0
Reportable Legal Entities | Origination Software | Professional services
Disaggregation of Revenue [Line Items]
Revenues	51.9	45.8	46.4
Reportable Legal Entities | Origination Software | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	2.7	1.2
Reportable Legal Entities | Origination Software | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 9.3	$ 12.9	$ 13.4