Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues:
Total revenues	$ 1,365.9	$ 1,321.0	$ 4,091.2	$ 3,944.7
Cost of revenues:
Total cost of revenues	711.5	697.2	2,158.7	2,076.8
Gross profit	654.4	623.8	1,932.5	1,867.9
Operating expenses:
Selling and marketing	134.7	120.9	411.6	371.1
Research and development	117.7	107.6	355.5	331.8
General and administrative	95.6	91.1	290.7	323.4
Total operating expenses	348.0	319.6	1,057.8	1,026.3
Operating income	306.4	304.2	874.7	841.6
Interest expense, net	(120.6)	(86.0)	(350.5)	(203.0)
Other (expense) income, net	(5.0)	1.1	15.3	(28.3)
Equity in earnings of unconsolidated affiliates, net	27.5	(5.1)	42.6	(2.7)
Loss on extinguishment of debt	(0.5)	(1.0)	(1.1)	(4.1)
Income before income taxes	207.8	213.2	581.0	603.5
Provision for income taxes	51.2	53.4	167.3	162.1
Net income	156.6	159.8	413.7	441.4
Net (income) loss attributable to noncontrolling interest	(0.6)	0.2	(1.0)	1.3
Net income attributable to SS&C common stockholders	$ 156.0	$ 160.0	$ 412.7	$ 442.7
Basic earnings per share attributable to SS&C common stockholders	$ 0.63	$ 0.63	$ 1.66	$ 1.74
Diluted earnings per share attributable to SS&C common stockholders	$ 0.61	$ 0.61	$ 1.62	$ 1.68
Basic weighted-average number of common shares outstanding	247,500,000	253,900,000	248,800,000	254,800,000
Diluted weighted-average number of common and common equivalent shares outstanding	253,900,000	260,900,000	255,300,000	263,700,000
Net income	$ 156.6	$ 159.8	$ 413.7	$ 441.4
Other comprehensive (loss) income, net of tax:
Change in unrealized gain on interest rate swaps	0.0	3.3	0.0	4.8
Foreign currency exchange translation adjustment	(113.0)	(248.6)	(4.8)	(512.0)
Change in defined benefit pension obligation	0.0	0.0	0.0	(1.1)
Total other comprehensive income (loss), net of tax	(113.0)	(245.3)	(4.8)	(508.3)
Comprehensive income (loss)	43.6	(85.5)	408.9	(66.9)
Comprehensive (income) loss attributable to noncontrolling interest	(0.6)	0.2	(1.0)	1.3
Comprehensive income (loss) attributable to SS&C common stockholders	43.0	(85.3)	407.9	(65.6)
Software-enabled Services
Revenues:
Total revenues	1,122.1	1,049.8	3,342.8	3,205.7
Cost of revenues:
Total cost of revenues	617.8	605.8	1,877.4	1,811.6
License, Maintenance and Related [Member]
Revenues:
Total revenues	243.8	271.2	748.4	739.0
Cost of revenues:
Total cost of revenues	$ 93.7	$ 91.4	$ 281.3	$ 265.2