Debt - Schedule of Senior Secured Credit Facilities and Senior Note (Details) $ in Millions	3 Months Ended
Mar. 31, 2024 USD ($)
Senior Notes
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 2,000.0
Debt Instrument, Maturity Date	Sep. 30, 2027
Line Of Credit Facility Periodic Payment Principal Percentage	0.00%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 0.0
Debt Instrument, Maturity Date	Dec. 28, 2027
Line Of Credit Facility Periodic Payment Principal Percentage	0.00%
Senior Secured Credit Facilities \| Term Loan B-3
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 994.4
Debt Instrument, Maturity Date	Apr. 16, 2025
Line Of Credit Facility Periodic Payment Principal Percentage	0.25%
Senior Secured Credit Facilities \| Term Loan B-4
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 938.9
Debt Instrument, Maturity Date	Apr. 16, 2025
Line Of Credit Facility Periodic Payment Principal Percentage	0.25%
Senior Secured Credit Facilities \| Term Loan B-5
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 1,582.0
Debt Instrument, Maturity Date	Apr. 16, 2025
Line Of Credit Facility Periodic Payment Principal Percentage	0.25%
Senior Secured Credit Facilities \| Term Loan B-6
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 394.0
Debt Instrument, Maturity Date	Mar. 22, 2029
Line Of Credit Facility Periodic Payment Principal Percentage	0.25%
Senior Secured Credit Facilities \| Term Loan B-7
Line of Credit Facility [Line Items]
Debt Instrument Carrying Amount	$ 765.9
Debt Instrument, Maturity Date	Mar. 22, 2029
Line Of Credit Facility Periodic Payment Principal Percentage	0.25%

Line Of Credit Facility Periodic Payment Principal Percentage

No definition available.

Name:	ssnc_LineOfCreditFacilityPeriodicPaymentPrincipalPercentage
Namespace Prefix:	ssnc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-4

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=ssnc_SeniorSecuredCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ssnc_TermLoanBThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ssnc_TermLoanBFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ssnc_TermLoanBFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ssnc_TermLoanBSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ssnc_TermLoanBSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: