Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Total revenues	$ 1,362.6	$ 1,328.7	$ 2,725.3	$ 2,623.7
Cost of revenues:
Total cost of revenues	721.5	704.4	1,447.2	1,379.6
Gross profit	641.1	624.3	1,278.1	1,244.1
Operating expenses:
Selling and marketing	137.1	139.3	276.9	250.2
Research and development	119.6	118.4	237.8	224.2
General and administrative	96.2	121.0	195.1	232.3
Total operating expenses	352.9	378.7	709.8	706.7
Operating income	288.2	245.6	568.3	537.4
Interest expense, net	(118.0)	(67.7)	(229.9)	(117.0)
Other income (expense), net	14.9	(20.4)	20.3	(29.4)
Equity in earnings of unconsolidated affiliates, net	9.4	1.1	15.1	2.4
Loss on extinguishment of debt	0.0	(3.1)	(0.6)	(3.1)
Income before income taxes	194.5	155.5	373.2	390.3
Provision for income taxes	63.6	45.2	116.1	108.7
Net income	130.9	110.3	257.1	281.6
Net (income) loss attributable to noncontrolling interest	(0.2)	0.3	(0.4)	1.1
Net income attributable to SS&C common stockholders	$ 130.7	$ 110.6	$ 256.7	$ 282.7
Basic earnings per share attributable to SS&C common stockholders	$ 0.53	$ 0.43	$ 1.03	$ 1.11
Diluted earnings per share attributable to SS&C common stockholders	$ 0.51	$ 0.42	$ 1	$ 1.06
Basic weighted-average number of common shares outstanding	248,500,000	254,900,000	249,500,000	255,300,000
Diluted weighted-average number of common and common equivalent shares outstanding	255,000,000	263,900,000	256,000,000	265,500,000
Net income	$ 130.9	$ 110.3	$ 257.1	$ 281.6
Other comprehensive income (loss), net of tax:
Change in unrealized gain on interest rate swaps	0.0	0.3	0.0	1.5
Foreign currency exchange translation adjustment	66.2	(235.1)	108.2	(263.4)
Change in defined benefit pension obligation	(0.1)	0.0	0.0	(1.1)
Total other comprehensive income (loss), net of tax	66.1	(234.8)	108.2	(263.0)
Comprehensive income (loss)	197.0	(124.5)	365.3	18.6
Comprehensive (income) loss attributable to noncontrolling interest	(0.2)	0.3	(0.4)	1.1
Comprehensive income (loss) attributable to SS&C common stockholders	196.8	(124.2)	364.9	19.7
Software-enabled Services [Member]
Revenues:
Total revenues	1,106.5	1,070.7	2,220.7	2,155.9
Cost of revenues:
Total cost of revenues	628.6	610.3	1,259.6	1,205.8
License, Maintenance and Related [Member]
Revenues:
Total revenues	256.1	258.0	504.6	467.8
Cost of revenues:
Total cost of revenues	$ 92.9	$ 94.1	$ 187.6	$ 173.8