Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 394.5	$ 361.3	$ 781.7	$ 711.0
Software solutions
Disaggregation of Revenue [Line Items]
Revenues	313.4	279.3	619.4	549.9
Professional services
Disaggregation of Revenue [Line Items]
Revenues	33.7	32.9	64.6	63.5
Data solutions
Disaggregation of Revenue [Line Items]
Revenues	44.1	46.4	91.0	92.0
Other
Disaggregation of Revenue [Line Items]
Revenues	3.3	2.7	6.7	5.6
Operating Segments | Software Solutions
Disaggregation of Revenue [Line Items]
Revenues	339.4	305.4	670.1	601.2
Operating Segments | Software Solutions | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	303.7	270.0	600.2	531.9
Operating Segments | Software Solutions | Professional services
Disaggregation of Revenue [Line Items]
Revenues	31.6	32.8	62.5	63.2
Operating Segments | Software Solutions | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	1.5	0.5	2.0	1.7
Operating Segments | Software Solutions | Other
Disaggregation of Revenue [Line Items]
Revenues	2.6	2.1	5.4	4.4
Operating Segments | Data and Analytics
Disaggregation of Revenue [Line Items]
Revenues	55.1	55.9	111.6	109.8
Operating Segments | Data and Analytics | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	9.7	9.3	19.2	18.0
Operating Segments | Data and Analytics | Professional services
Disaggregation of Revenue [Line Items]
Revenues	2.1	0.1	2.1	0.3
Operating Segments | Data and Analytics | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	42.6	45.9	89.0	90.3
Operating Segments | Data and Analytics | Other
Disaggregation of Revenue [Line Items]
Revenues	0.7	0.6	1.3	1.2
Reportable Legal Entities | Servicing Software
Disaggregation of Revenue [Line Items]
Revenues	221.7	207.8	444.3	410.5
Reportable Legal Entities | Servicing Software | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	203.3	187.4	407.3	371.5
Reportable Legal Entities | Servicing Software | Professional services
Disaggregation of Revenue [Line Items]
Revenues	18.4	20.4	37.0	39.0
Reportable Legal Entities | Origination Software
Disaggregation of Revenue [Line Items]
Revenues	117.7	97.6	225.8	190.7
Reportable Legal Entities | Origination Software | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	100.4	82.6	192.9	160.4
Reportable Legal Entities | Origination Software | Professional services
Disaggregation of Revenue [Line Items]
Revenues	13.2	12.4	25.5	24.2
Reportable Legal Entities | Origination Software | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	1.5	0.5	2.0	1.7
Reportable Legal Entities | Origination Software | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 2.6	$ 2.1	$ 5.4	$ 4.4