Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total net sales		$ 993.3	$ 894.5	$ 874.7
Income (Loss) from Operations		219.3	3.6	78.5
Assets	[1]	883.3	865.6	886.9
Depreciation and amortization		40.3	50.9	49.6
Capital Expenditures		42.3	31.1	44.8
Capital Markets - Software Solutions
Segment Reporting Information [Line Items]
Total net sales		181.0	133.2	126.7
Income (Loss) from Operations		30.4	8.5	9.6
Assets	[1]	186.6	167.7	164.8
Depreciation and amortization		16.7	13.1	12.6
Capital Expenditures		18.8	14.8	15.2
Capital Markets - Compliance and Communications Management
Segment Reporting Information [Line Items]
Total net sales		561.5	424.0	389.7
Income (Loss) from Operations		242.6	120.6	86.3
Assets	[1]	418.3	389.6	408.7
Depreciation and amortization		5.9	14.4	15.3
Capital Expenditures		3.0	3.4	6.4
Investment Companies - Software Solutions
Segment Reporting Information [Line Items]
Total net sales		89.0	67.0	62.6
Income (Loss) from Operations		8.9	(1.7)	(7.8)
Assets	[1]	91.2	91.8	100.4
Depreciation and amortization		12.6	12.0	12.7
Capital Expenditures		13.0	9.5	15.4
Investment Companies - Compliance and Communications Management
Segment Reporting Information [Line Items]
Total net sales		161.8	270.3	295.7
Income (Loss) from Operations		15.0	(43.1)	29.4
Assets	[1]	49.3	67.7	121.7
Depreciation and amortization		4.7	10.0	8.9
Capital Expenditures		2.9	2.1	6.9
Operating Segments
Segment Reporting Information [Line Items]
Total net sales		993.3	894.5	874.7
Income (Loss) from Operations		296.9	84.3	117.5
Assets	[1]	745.4	716.8	795.6
Depreciation and amortization		39.9	49.5	49.5
Capital Expenditures		37.7	29.8	43.9
Corporate
Segment Reporting Information [Line Items]
Total net sales		0.0	0.0	0.0
Income (Loss) from Operations		(77.6)	(80.7)	(39.0)
Assets	[1]	137.9	148.8	91.3
Depreciation and amortization		0.4	1.4	0.1
Capital Expenditures		$ 4.6	$ 1.3	$ 0.9

[1] Certain assets are recorded within a segment based on predominant usage, however, as they benefit more than one segment, the related operating expenses are allocated between segments.