Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 432.2	$ 440.1
Funds receivable and funds held on behalf of clients	2,615.6	966.3
Accounts receivable, net of allowance for credit losses of $25.1 and $21.7, respectively (Note 3)	799.4	778.6
Contract asset	36.1	42.3
Prepaid expenses and other current assets	165.8	193.8
Restricted cash and cash equivalents	2.4	3.3
Total current assets	4,051.5	2,424.4
Property, plant and equipment, net (Note 4)	315.3	343.9
Operating lease right-of-use assets (Note 5)	221.4	260.6
Investments (Note 6)	184.7	193.9
Unconsolidated affiliates (Note 7)	345.2	266.9
Contract asset	99.7	115.9
Goodwill (Note 9)	8,969.5	8,863.0
Intangible and other assets, net of accumulated amortization of $4,063.4 and $3,445.4, respectively (Note 9)	3,915.2	4,184.7
Total assets	18,102.5	16,653.3
Current liabilities:
Current portion of long-term debt (Note 10)	51.5	55.7
Client funds obligations	2,615.6	966.3
Accounts payable	80.3	49.5
Income taxes payable	22.3	34.3
Accrued employee compensation and benefits	270.2	235.8
Interest payable	29.4	28.4
Other accrued expenses	232.3	356.1
Deferred revenues	470.3	464.7
Total current liabilities	3,771.9	2,190.8
Long-term debt, net of current portion (Note 10)	6,668.5	7,023.9
Operating lease liabilities	199.1	237.0
Other long-term liabilities	248.7	225.8
Deferred income taxes	816.6	872.9
Total liabilities	11,704.8	10,550.4
Commitments and contingencies (Note 18)
Redeemable noncontrolling interest (Note 6)	0.0	2.1
Stockholders’ equity (Note 11):
Preferred stock, $0.01 par value per share, 5.0 million shares authorized; no shares issued	0.0	0.0
Additional paid-in capital	5,371.0	5,111.6
Accumulated other comprehensive loss	(426.3)	(550.1)
Retained earnings	3,126.3	2,740.1
Cost of common stock in treasury, 20.9 and 13.1 million shares, respectively	(1,734.2)	(1,260.1)
Total SS&C stockholders' equity	6,339.6	6,044.2
Noncontrolling interest (Note 12)	58.1	56.6
Total equity	6,397.7	6,100.8
Total liabilities, redeemable noncontrolling interest and equity	18,102.5	16,653.3
Class A Non-Voting Common Stock [Member]
Stockholders’ equity (Note 11):
Common stock	0.0	0.0
Common Stock [Member]
Stockholders’ equity (Note 11):
Common stock	$ 2.8	$ 2.7