Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Total revenues	$ 5,882.0	$ 5,502.8	$ 5,283.0
Cost of revenues:
Total cost of revenues	3,018.4	2,851.0	2,767.7
Gross profit	2,863.6	2,651.8	2,515.3
Operating expenses:
Selling and marketing	584.2	550.9	500.1
Research and development	517.7	473.8	447.3
General and administrative	418.2	418.2	425.0
Total operating expenses	1,520.1	1,442.9	1,372.4
Operating income	1,343.5	1,208.9	1,142.9
Interest income	11.1	6.5	4.3
Interest expense	(463.0)	(476.3)	(312.2)
Other income, net	8.9	20.7	20.8
Equity in earnings of unconsolidated affiliates, net	24.4	100.0	25.8
Loss on extinguishment of debt, net	(31.2)	(2.1)	(5.5)
Income before income taxes	893.7	857.7	876.1
Provision for income taxes (Note 17)	132.0	249.1	227.1
Net income	761.7	608.6	649.0
Net (income) loss attributable to noncontrolling interest	(1.2)	(1.5)	1.2
Net income attributable to SS&C common stockholders	$ 760.5	$ 607.1	$ 650.2
Basic earnings per share attributable to SS&C common stockholders	$ 3.09	$ 2.45	$ 2.56
Diluted earnings per share attributable to SS&C common stockholders	$ 3	$ 2.39	$ 2.48
Basic weighted-average number of common shares outstanding	246.4	248.3	254.0
Diluted weighted-average number of common and common equivalent shares outstanding	253.8	254.5	262.0
Net income	$ 761.7	$ 608.6	$ 649.0
Other comprehensive income (loss), net of tax:
Change in unrealized gain on interest rate swaps	0.0	0.0	4.8
Defined benefit pension adjustment	0.2	(0.7)	(1.3)
Foreign currency exchange translation adjustment	(115.1)	124.5	(311.6)
Total other comprehensive (loss) income, net of tax	(114.9)	123.8	(308.1)
Comprehensive income	646.8	732.4	340.9
Comprehensive (income) loss attributable to noncontrolling interest	(1.2)	(1.5)	1.2
Comprehensive income attributable to SS&C common stockholders	645.6	730.9	342.1
Software-enabled Services [Member]
Revenues:
Total revenues	4,840.3	4,488.3	4,273.9
Cost of revenues:
Total cost of revenues	2,618.8	2,472.0	2,414.8
Cost of license, maintenance and other related
Revenues:
Total revenues	1,041.7	1,014.5	1,009.1
Cost of revenues:
Total cost of revenues	$ 399.6	$ 379.0	$ 352.9