Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 386.7	$ 378.0	$ 1,168.4	$ 1,089.0
Software solutions
Disaggregation of Revenue [Line Items]
Revenues	304.9	292.9	924.3	842.8
Professional services
Disaggregation of Revenue [Line Items]
Revenues	31.8	33.9	96.4	97.4
Data solutions
Disaggregation of Revenue [Line Items]
Revenues	44.0	48.0	135.0	140.0
Other
Disaggregation of Revenue [Line Items]
Revenues	6.0	3.2	12.7	8.8
Operating Segments | Software Solutions
Disaggregation of Revenue [Line Items]
Revenues	332.7	319.6	1,002.8	920.8
Operating Segments | Software Solutions | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	294.9	283.4	895.1	815.3
Operating Segments | Software Solutions | Professional services
Disaggregation of Revenue [Line Items]
Revenues	31.0	33.1	93.5	96.3
Operating Segments | Software Solutions | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	1.6	0.5	3.6	2.2
Operating Segments | Software Solutions | Other
Disaggregation of Revenue [Line Items]
Revenues	5.2	2.6	10.6	7.0
Operating Segments | Data and Analytics
Disaggregation of Revenue [Line Items]
Revenues	54.0	58.4	165.6	168.2
Operating Segments | Data and Analytics | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	10.0	9.5	29.2	27.5
Operating Segments | Data and Analytics | Professional services
Disaggregation of Revenue [Line Items]
Revenues	0.8	0.8	2.9	1.1
Operating Segments | Data and Analytics | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	42.4	47.5	131.4	137.8
Operating Segments | Data and Analytics | Other
Disaggregation of Revenue [Line Items]
Revenues	0.8	0.6	2.1	1.8
Reportable Legal Entities | Servicing Software
Disaggregation of Revenue [Line Items]
Revenues	217.7	210.9	662.0	621.4
Reportable Legal Entities | Servicing Software | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	199.9	190.3	607.2	561.8
Reportable Legal Entities | Servicing Software | Professional services
Disaggregation of Revenue [Line Items]
Revenues	17.8	20.6	54.8	59.6
Reportable Legal Entities | Origination Software
Disaggregation of Revenue [Line Items]
Revenues	115.0	108.7	340.8	299.4
Reportable Legal Entities | Origination Software | Software solutions
Disaggregation of Revenue [Line Items]
Revenues	95.0	93.1	287.9	253.5
Reportable Legal Entities | Origination Software | Professional services
Disaggregation of Revenue [Line Items]
Revenues	13.2	12.5	38.7	36.7
Reportable Legal Entities | Origination Software | Data solutions
Disaggregation of Revenue [Line Items]
Revenues	1.6	0.5	3.6	2.2
Reportable Legal Entities | Origination Software | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 5.2	$ 2.6	$ 10.6	$ 7.0