Revenue - Schedule of Disaggregation of Revenue between Software Solutions, Tech-Enabled Services and Print and Distribution by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total	$ 205.5	$ 201.1
Software Solutions
Disaggregation of Revenue [Line Items]
Total	91.7	84.6
Tech-enabled Services
Disaggregation of Revenue [Line Items]
Total	70.1	76.5
Print and Distribution
Disaggregation of Revenue [Line Items]
Total	43.7	40.0
Capital Markets - Software Solutions
Disaggregation of Revenue [Line Items]
Total	58.6	51.9
Capital Markets - Software Solutions \| Software Solutions
Disaggregation of Revenue [Line Items]
Total	58.6	51.9
Capital Markets - Software Solutions \| Tech-enabled Services
Disaggregation of Revenue [Line Items]
Total	0.0	0.0
Capital Markets - Software Solutions \| Print and Distribution
Disaggregation of Revenue [Line Items]
Total	0.0	0.0
Capital Markets - Compliance and Communications Management
Disaggregation of Revenue [Line Items]
Total	82.8	83.9
Capital Markets - Compliance and Communications Management \| Software Solutions
Disaggregation of Revenue [Line Items]
Total	0.0	0.0
Capital Markets - Compliance and Communications Management \| Tech-enabled Services
Disaggregation of Revenue [Line Items]
Total	53.3	59.8
Capital Markets - Compliance and Communications Management \| Print and Distribution
Disaggregation of Revenue [Line Items]
Total	29.5	24.1
Investment Companies - Software Solutions
Disaggregation of Revenue [Line Items]
Total	33.1	32.7
Investment Companies - Software Solutions \| Software Solutions
Disaggregation of Revenue [Line Items]
Total	33.1	32.7
Investment Companies - Software Solutions \| Tech-enabled Services
Disaggregation of Revenue [Line Items]
Total	0.0	0.0
Investment Companies - Software Solutions \| Print and Distribution
Disaggregation of Revenue [Line Items]
Total	0.0	0.0
Investment Companies - Compliance and Communications Management
Disaggregation of Revenue [Line Items]
Total	31.0	32.6
Investment Companies - Compliance and Communications Management \| Software Solutions
Disaggregation of Revenue [Line Items]
Total	0.0	0.0
Investment Companies - Compliance and Communications Management \| Tech-enabled Services
Disaggregation of Revenue [Line Items]
Total	16.8	16.7
Investment Companies - Compliance and Communications Management \| Print and Distribution
Disaggregation of Revenue [Line Items]
Total	$ 14.2	$ 15.9

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details