Debt - Additional Information (Detail) - USD ($) | Jul. 08, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 |
Debt Instrument [Line Items] | | | | | |
Debt instrument, interest rate terms | | | | The Term Loans and Revolving Credit Facility bear interest, at the election of the borrowers, at the base rate (as defined in the Credit Agreement) or LIBOR, plus the applicable interest rate margin for the credit facility. The Term A-1 Loan, Term A-2 Loan and the Revolving Credit Facility initially bear interest at either LIBOR plus 2.75% or at the base rate plus 1.75%, and are subject to a step-down at any time SS&C’s consolidated net senior secured leverage ratio is less than 3.0 times, to 2.50% in the case of the LIBOR margin and 1.50% in the case of the base rate margin. The Term B-1 Loan and Term B-2 Loan initially bear interest at either LIBOR plus 3.25%, with LIBOR subject to a 0.75% floor, or at the base rate plus 2.25%, and are subject to a step-down at any time SS&C’s consolidated net leverage ratio is less than 4.0 times, to 3.00% in the case of the LIBOR margin and 2.00% in the case of the base rate margin. | |
Company amortized to interest expense | | $ 500,000 | $ 300,000 | $ 1,200,000 | $ 1,100,000 |
Capitalized financing costs, aggregate amount | | | | 45,800,000 | |
Capitalized financing costs amortized to interest expense | | 2,100,000 | $ 1,100,000 | 4,300,000 | $ 3,300,000 |
Loss on extinguishment of debt | | (30,417,000) | | $ (30,417,000) | |
Term B-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Minimum senior secured leverage ratio required | 4.00% | | | | |
Term B-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Minimum senior secured leverage ratio required | 4.00% | | | | |
Term A-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Minimum senior secured leverage ratio required | 3.00% | | | | |
Term A-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Minimum senior secured leverage ratio required | 3.00% | | | | |
Minimum [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Percentage of change in cash flows due to debt extinguishment obligation | | | | 10.00% | |
LIBOR Plus [Member] | Term B-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 3.25% | | | | |
Debt instrument, floor rate | 0.75% | | | | |
LIBOR Plus [Member] | Term B-1 Loan [Member] | Leverage Ratio is Less Than 4 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 3.00% | | | | |
LIBOR Plus [Member] | Term B-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 3.25% | | | | |
Debt instrument, floor rate | 0.75% | | | | |
LIBOR Plus [Member] | Term B-2 Loan [Member] | Leverage Ratio is Less Than 4 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 3.00% | | | | |
LIBOR Plus [Member] | Term A-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.75% | | | | |
LIBOR Plus [Member] | Term A-1 Loan [Member] | Leverage Ratio is Less Than 3 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.50% | | | | |
LIBOR Plus [Member] | Term A-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.75% | | | | |
LIBOR Plus [Member] | Term A-2 Loan [Member] | Leverage Ratio is Less Than 3 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.50% | | | | |
Base Rate Plus [Member] | Term B-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.25% | | | | |
Base Rate Plus [Member] | Term B-1 Loan [Member] | Leverage Ratio is Less Than 4 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.00% | | | | |
Base Rate Plus [Member] | Term B-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.25% | | | | |
Base Rate Plus [Member] | Term B-2 Loan [Member] | Leverage Ratio is Less Than 4 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.00% | | | | |
Base Rate Plus [Member] | Term A-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 1.75% | | | | |
Base Rate Plus [Member] | Term A-1 Loan [Member] | Leverage Ratio is Less Than 3 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 1.50% | | | | |
Base Rate Plus [Member] | Term A-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 1.75% | | | | |
Base Rate Plus [Member] | Term A-2 Loan [Member] | Leverage Ratio is Less Than 3 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 1.50% | | | | |
Senior Secured Credit Facilities [Member] | Term B-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | $ 1,820,000,000 | | | | |
Senior Secured Credit Facilities [Member] | Term B-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | 410,000,000 | | | | |
Senior Secured Credit Facilities [Member] | Term A-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | 98,000,000 | | | | |
Senior Secured Credit Facilities [Member] | Term A-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | 152,000,000 | | | | |
Revolving Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | $ 150,000,000 | | | | |
Minimum senior secured leverage ratio required | 3.00% | | | | |
Company amortized to interest expense | | | | $ 0 | |
Revolving Credit Facility [Member] | LIBOR Plus [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.75% | | | | |
Revolving Credit Facility [Member] | LIBOR Plus [Member] | Leverage Ratio is Less Than 3 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 2.50% | | | | |
Revolving Credit Facility [Member] | Base Rate Plus [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 1.75% | | | | |
Revolving Credit Facility [Member] | Base Rate Plus [Member] | Leverage Ratio is Less Than 3 Times [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument, basis spread on variable rate | 1.50% | | | | |
Letter of Credit [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | $ 25,000,000 | | | | |
Line of credit facility, amount drawn | $ 0 | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, frequency of payments | | | | Quarterly | |
Credit facility collateral, percentage of capital stock of foreign restricted subsidiaries | 65.00% | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | Term B-1 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Quarterly payments percentage on original principal amount | 0.25% | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | Term B-2 Loan [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Quarterly payments percentage on original principal amount | 0.25% | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | Term A-1 Loan [Member] | Until September 30, 2017 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Quarterly payments percentage on original principal amount | 1.25% | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | Term A-1 Loan [Member] | From December 31, 2017 Until June 30, 2020 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Quarterly payments percentage on original principal amount | 2.50% | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | Term A-2 Loan [Member] | Until September 30, 2017 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Quarterly payments percentage on original principal amount | 1.25% | | | | |
Secured Debt [Member] | Senior Secured Credit Facilities [Member] | Term A-2 Loan [Member] | From December 31, 2017 Until June 30, 2020 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Quarterly payments percentage on original principal amount | 2.50% | | | | |
Senior Notes [Member] | 5.875% Senior Notes due 2023 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt principal amount | $ 600,000,000 | $ 600,000,000 | | $ 600,000,000 | |
Debt instrument, interest rate terms | | | | If the Company is not able to complete the exchange offer registration statement in the period stated or at all (or a shelf registration statement with the SEC to cover resales of the Senior Notes is not declared effective), the interest rate on the notes will increase 0.25% per year. The amount of additional interest will increase an additional 0.25% per year for any subsequent 90-day period in which the Company has not yet completed and have declared effective a registration statement, up to a maximum additional interest rate of 1.00% per year. | |
Debt, interest rate | 5.875% | 5.875% | | 5.875% | |
Debt, due date | 2,023 | | | 2,023 | |
Increase in debt instrument interest | | | | 0.25% | |
Senior Notes, redemption period, on or before date | | | | Jul. 15, 2018 | |
Percentage of principal amount of Senior Notes redeemed | 35.00% | | | | |
Senior Notes, redemption price, percentage of principal amount plus accrued and unpaid interest | 105.875% | | | | |
Principal amount of Senior Notes outstanding | | $ 600,000,000 | | $ 600,000,000 | |
Senior Notes [Member] | Maximum [Member] | 5.875% Senior Notes due 2023 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Increase in debt instrument interest | | | | 1.00% | |