Revenue - Schedule of Disaggregation of Revenue between Tech-Enabled Services, Software Solutions and Print and Distribution by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total net sales	$ 266.2	$ 267.5	$ 477.2	$ 512.8
Tech-enabled Services
Total net sales	133.3	134.0	225.0	252.5
Software Solutions
Total net sales	71.6	66.6	141.4	126.9
Print and Distribution
Total net sales	61.3	66.9	110.8	133.4
Capital Markets - Software Solutions
Total net sales	46.3	43.8	91.0	82.3
Capital Markets - Software Solutions | Tech-enabled Services
Total net sales	0.0	0.0	0.0	0.0
Capital Markets - Software Solutions | Software Solutions
Total net sales	46.3	43.8	91.0	82.3
Capital Markets - Software Solutions | Print and Distribution
Total net sales	0.0	0.0	0.0	0.0
Capital Markets - Compliance and Communications Management
Total net sales	150.0	153.1	253.6	291.6
Capital Markets - Compliance and Communications Management | Tech-enabled Services
Total net sales	110.9	113.8	182.0	209.8
Capital Markets - Compliance and Communications Management | Software Solutions
Total net sales	0.0	0.0	0.0	0.0
Capital Markets - Compliance and Communications Management | Print and Distribution
Total net sales	39.1	39.3	71.6	81.8
Investment Companies - Software Solutions
Total net sales	25.3	22.8	50.4	44.6
Investment Companies - Software Solutions | Tech-enabled Services
Total net sales	0.0	0.0	0.0	0.0
Investment Companies - Software Solutions | Software Solutions
Total net sales	25.3	22.8	50.4	44.6
Investment Companies - Software Solutions | Print and Distribution
Total net sales	0.0	0.0	0.0	0.0
Investment Companies - Compliance and Communications Management
Total net sales	44.6	47.8	82.2	94.3
Investment Companies - Compliance and Communications Management | Tech-enabled Services
Total net sales	22.4	20.2	43.0	42.7
Investment Companies - Compliance and Communications Management | Software Solutions
Total net sales	0.0	0.0	0.0	0.0
Investment Companies - Compliance and Communications Management | Print and Distribution
Total net sales	$ 22.2	$ 27.6	$ 39.2	$ 51.6