Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues:
Total revenues	$ 1,362.7	$ 1,295.0
Cost of revenues:
Total cost of revenues	725.7	675.2
Gross profit	637.0	619.8
Operating expenses:
Selling and marketing	139.8	110.9
Research and development	118.2	105.8
General and administrative	98.9	111.3
Total operating expenses	356.9	328.0
Operating income	280.1	291.8
Interest expense, net	(111.9)	(49.3)
Other income (expense), net	5.4	(9.0)
Equity in earnings of unconsolidated affiliates, net	5.7	1.3
Loss on extinguishment of debt	(0.6)	(0.0)
Income before income taxes	178.7	234.8
Provision for income taxes	52.5	63.5
Net income	126.2	171.3
Net (income) loss attributable to noncontrolling interest	(0.2)	0.8
Net income attributable to SS&C common stockholders	$ 126.0	$ 172.1
Basic earnings per share attributable to SS&C common stockholders	$ 0.50	$ 0.67
Diluted earnings per share attributable to SS&C common stockholders	$ 0.49	$ 0.64
Basic weighted-average number of common shares outstanding	250,400,000	255,800,000
Diluted weighted-average number of common and common equivalent shares outstanding	257,000,000.0	267,600,000
Net income	$ 126.2	$ 171.3
Other comprehensive income (loss), net of tax:
Change in unrealized gain on interest rate swaps	0.0	1.2
Foreign currency exchange translation adjustment	42.0	(28.3)
Change in defined benefit pension obligation	0.1	(1.1)
Total other comprehensive income (loss), net of tax	42.1	(28.2)
Comprehensive income	168.3	143.1
Comprehensive (income) loss attributable to noncontrolling interest	(0.2)	0.8
Comprehensive income attributable to SS&C common stockholders	168.1	143.9
Software-enabled Services [Member]
Revenues:
Total revenues	1,114.2	1,085.2
Cost of revenues:
Total cost of revenues	631.0	595.5
License, Maintenance and Related [Member]
Revenues:
Total revenues	248.5	209.8
Cost of revenues:
Total cost of revenues	$ 94.7	$ 79.7