Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Aug. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Commitments represent obligations, such as those for future purchases of goods or services that are not yet recorded on the balance sheet as liabilities. FactSet records liabilities for commitments when incurred (i.e., when the goods or services are received). Purchase Commitments with Suppliers Purchase obligations represent payments due in future periods in respect of commitments to the Company’s various data vendors as well as commitments to purchase goods and services such as telecommunication and computer maintenance services. These purchase commitments are agreements that are enforceable and legally binding on FactSet, and they specify all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of the transaction. As of August 31, 2020 and 2019, the Company had total purchase commitments with suppliers of $226.0 million and $69.9 million, respectively. Refer to Note 11, Leases and Note 12, Debt for information regarding lease commitments and outstanding debt obligations, respectively. Letters of Credit Approximately $2.9 million of standby letters of credit have been issued during the ordinary course of business in connection with the Company’s current leased office space as of August 31, 2020. These standby letters of credit contain covenants that, among other things, require FactSet to maintain minimum levels of consolidated net worth and certain leverage and fixed charge ratios. As of August 31, 2020 and 2019, FactSet was in compliance with all covenants contained in the standby letters of credit. Contingencies Income Taxes Uncertain income tax positions are accounted for in accordance with applicable accounting guidance, refer to Note 10, Income Taxes for further details. FactSet is currently under audit by tax authorities and has reserved for potential adjustments to its provision for income taxes that may result from examinations by, or any negotiated settlements with, these tax authorities. The Company believes that the final outcome of these examinations or settlements will not have a material effect on its results of operations. If events occur which indicate payment of these amounts is unnecessary, the reversal of the liabilities would result in the recognition of tax benefits in the period FactSet determines the liabilities are no longer necessary. If the Company’s estimates of the federal, state, and foreign income tax liabilities are less than the ultimate assessment, a further charge to expense would result. Legal Matters FactSet accrues non income-tax liabilities for contingencies when management believes that a loss is probable, and the amounts can be reasonably estimated, while contingent gains are recognized only when realized. The Company is engaged in various legal proceedings, claims and litigation that have arisen in the ordinary course of business, including employment matters, commercial and intellectual property litigation. The outcome of all the matters against the Company is subject to future resolution, including the uncertainties of litigation. Based on information available at August 31, 2020, FactSet’s management believes that the ultimate outcome of these unresolved matters against the Company, individually or in the aggregate, will not have a material adverse effect on the Company's consolidated financial position, its results of operations or its cash flows. Sales Tax Matters In August 2019, FactSet received a Notice of Intent to Assess (the "Notice") additional sales taxes, interest and underpayment penalties from the Commonwealth of Massachusetts Department of Revenue (the "Commonwealth") relating to prior tax periods. The Notice follows FactSet’s previously disclosed response to a letter from the Commonwealth requesting additional sales information. Based upon the Notice, it is the Commonwealth's intention to assess sales/use tax, interest and penalties on previously recorded sales transactions. The Company filed an appeal to the Notice and intends to contest any such assessment, if assessed, and continues to cooperate with the Commonwealth’s inquiry. Due to uncertainty surrounding the assessment process, the Company is unable to reasonably estimate the ultimate outcome of this matter and, as such, has not recorded a liability as of August 31, 2020. While FactSet believes that it will ultimately prevail if the Company is presented with a formal assessment; if FactSet does not prevail, the amount could have a material impact on the Company’s consolidated financial position, cash flows and results of operations. Indemnifications As permitted or required under Delaware law and to the maximum extent allowable under that law, FactSet has certain obligations to indemnify its current and former officers and directors for certain events or occurrences while the officer or director is, or was serving, at FactSet’s request in such capacity. These indemnification obligations are valid as long as the director or officer acted in good faith and in a manner the person reasonably believed to be in, or not opposed to, the best interests of the Company, and with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. The maximum potential amount of future payments FactSet could be required to make under these indemnification obligations is unlimited; however, FactSet has a director and officer insurance policy that it believes mitigates FactSet's exposure and may enable FactSet to recover a portion of any future amounts paid. The Company believes the estimated fair value of these indemnification obligations is immaterial.