Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net Sales		$ 833.6	$ 993.3	$ 894.5
Income (Loss) from Operations		145.0	219.3	3.6
Assets	[1]	828.3	883.3	865.6
Depreciation and Amortization		46.3	40.3	50.9
Capital Expenditures		54.2	42.3	31.1
Capital Markets - Software Solutions
Segment Reporting Information [Line Items]
Net Sales		180.2	181.0	133.2
Income (Loss) from Operations		13.5	30.4	8.5
Assets	[1]	187.4	186.6	167.7
Depreciation and Amortization		23.0	16.7	13.1
Capital Expenditures		27.0	18.8	14.8
Capital Markets - Compliance and Communications Management
Segment Reporting Information [Line Items]
Net Sales		410.3	561.5	424.0
Income (Loss) from Operations		131.4	242.6	120.6
Assets	[1]	387.7	418.3	389.6
Depreciation and Amortization		6.7	5.9	14.4
Capital Expenditures		5.0	3.0	3.4
Investment Companies - Software Solutions
Segment Reporting Information [Line Items]
Net Sales		99.4	89.0	67.0
Income (Loss) from Operations		21.9	8.9	(1.7)
Assets	[1]	98.4	91.2	91.8
Depreciation and Amortization		11.9	12.6	12.0
Capital Expenditures		15.6	13.0	9.5
Investment Companies - Compliance and Communications Management
Segment Reporting Information [Line Items]
Net Sales		143.7	161.8	270.3
Income (Loss) from Operations		35.7	15.0	(43.1)
Assets	[1]	36.7	49.3	67.7
Depreciation and Amortization		4.6	4.7	10.0
Capital Expenditures		3.0	2.9	2.1
Operating Segments
Segment Reporting Information [Line Items]
Net Sales		833.6	993.3	894.5
Income (Loss) from Operations		202.5	296.9	84.3
Assets	[1]	710.2	745.4	716.8
Depreciation and Amortization		46.2	39.9	49.5
Capital Expenditures		50.6	37.7	29.8
Corporate
Segment Reporting Information [Line Items]
Net Sales		0.0	0.0	0.0
Income (Loss) from Operations		(57.5)	(77.6)	(80.7)
Assets	[1]	118.1	137.9	148.8
Depreciation and Amortization		0.1	0.4	1.4
Capital Expenditures		$ 3.6	$ 4.6	$ 1.3

[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.