Non-option award grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Document Type Document Type Other income (expense), net Other Nonoperating Income (Expense) Stock options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Offering period Share-Based Compensation By Share-Based Payment Award, Offering Period Share-Based Compensation By Share-Based Payment Award, Offering Period Treasury Stock Treasury Stock [Member] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Components of AOCL Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Share repurchase program Share Repurchase Program [Member] Represents information related to the Share Repurchase Program. Level 3 Fair Value, Inputs, Level 3 [Member] Derivative instruments Derivative Asset Statistical Measurement [Domain] Statistical Measurement [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Deferred taxes Deferred Income Tax Liabilities, Net Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Security Exchange Name Security Exchange Name Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Fair value as a percentage of exercise price Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Operating income Operating income Operating Income (Loss) Debt issuance costs Payments of Debt Issuance Costs Total current liabilities Liabilities, Current Performance-based awards Performance Shares [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Variable Rate [Domain] Variable Rate [Domain] Variable Rate [Axis] Variable Rate [Axis] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Commitments and contingencies (see Note 12) Commitments and Contingencies Value of shares repurchased in settlement of employee tax withholding obligations Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Share-based Payment Arrangement, Tranche Two Share-based Payment Arrangement, Tranche Two [Member] Repurchases of common stock Payments for Repurchase of Common Stock ASSETS Assets [Abstract] Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Accounting Policies [Abstract] Accounting Policies [Abstract] Entity Address, State or Province Entity Address, State or Province Restricted stock vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Proceeds from employee stock plans Proceeds from Stock Plans Cash paid for amounts included in the measurement of lease liabilities Operating Lease, Payments Foreign currency translations Goodwill, Foreign Currency Translation Gain (Loss) Retained earnings Retained Earnings (Accumulated Deficit) Lease right-of-use assets, net ROU assets Operating Lease, Right-of-Use Asset 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Repurchase of common stock (in shares) Repurchase of common stock (in shares) Treasury Stock, Shares, Acquired 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Unrecognized compensation expense related to non-vested equity Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Preferred stock, $0.01 par value, 10,000,000 shares authorized, none issued Preferred Stock, Value, Issued Hedging Designation [Domain] Hedging Designation [Domain] Total operating expenses Operating Expenses Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Other non-current liabilities Other Liabilities, Noncurrent Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Revenues Total Revenue Revenue Revenue from Contract with Customer, Excluding Assessed Tax Measurement Frequency [Domain] 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Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Stock issued during period employee stock purchase plans weighted average price per share (in USD per share) Stock Issued During Period Employee Stock Purchase Plans Weighted Average Price Per Share Stock Issued During Period Employee Stock Purchase Plans Weighted Average Price Per Share 2019 Revolving Credit Facility debt issuance costs Unamortized Debt Issuance Expense Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Share Repurchase Program [Domain] Share Repurchase Program [Domain] SG&A Selling, General and Administrative Expenses [Member] Goodwill [Roll Forward] Goodwill [Roll Forward] Summary of gross notional values of derivative instruments Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block] Amendment Flag Amendment Flag Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] 2019 Revolving Credit Facility 2019 Revolving Credit Facility The 2019 Revolving Credit Facility [Member] Represents information about the 2017 Revolving Credit Facility. Purchase price allocation Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Number of shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Purchase commitment, remaining minimum amount committed Purchase Commitment, Remaining Minimum Amount Committed Long-term line of credit Long-term Line of Credit New York Stock Exchange LLC NEW YORK STOCK EXCHANGE, INC. [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Entity Central Index Key Entity Central Index Key Measurement Frequency [Axis] Measurement Frequency [Axis] Number of reporting units Number of Reporting Units Accumulated unrealized losses on cash flow hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Other non-current liabilities Other Noncurrent Liabilities [Member] Geographical [Axis] Geographical [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Taxes payable Accrued Income Taxes, Noncurrent Net tax benefit Effective Income Tax Rate Reconciliation, Discrete Income Tax Expense (Benefit), Amount Effective Income Tax Rate Reconciliation, Discrete Income Tax Expense (Benefit), Amount Income Statement Location [Axis] Income Statement Location [Axis] Accounts receivable reserve Accounts Receivable, Allowance for Credit Loss, Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income Statement Location [Domain] Income Statement Location [Domain] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Vesting of restricted stock (in shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Selling, general and administrative Selling, General and Administrative Expense Truvalue Labs, Inc. Truvalue Labs, Inc. [Member] Truvalue Labs, Inc. Gross notional amount Derivative, Notional Amount Foreign currency forward contracts Foreign exchange contract Foreign Exchange Contract [Member] Schedule of other information related to operating leases Lease, Cost [Table Text Block] Exchange [Domain] Exchange [Domain] Supplier [Domain] Supplier [Domain] Prepaid taxes Prepaid Taxes 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Other assets Other Assets, Noncurrent Plan Name [Axis] Plan Name [Axis] Segment Information Segment Reporting Disclosure [Text Block] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Concentration Risk [Table] Concentration Risk [Table] Liabilities, fair value Financial Liabilities Fair Value Disclosure TOTAL ASSETS Assets Assets Interest expense Interest Expense, Debt Title of 12(b) Security Title of 12(b) Security Repurchase of common stock from employees Repurchase of Common Stock from Employees [Member] Represents information pertaining to the repurchase of common stock from employees. Estimated fair value (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Subsequent Event Type [Axis] Subsequent Event Type [Axis] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Vesting [Domain] Vesting [Domain] Minimum borrowing amount required for additional borrowings fds_LineOfCreditFacilityMinimumBorrowingAmountRequiredForAdditionalBorrowings The minimum borrowing amount that is required for the Company to arrange for additional borrowings with the lender under the credit facility. TOTAL LIABILITIES Liabilities Other Assets Other Noncurrent Assets [Member] Weighted average period for recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Less: Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Income available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Commitments and Contingencies Disclosure [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Operating lease cost Operating Lease, Expense Gain Recognized in AOCL on Derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Percent of foreign exchange contracts hedged (in percentage) fds_PercentOfForeignExchangeContractsHedged Represents the percent of foreign exchange contracts hedged. 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Windfall tax benefit from stock-based compensation Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount Mutual funds Investments, Fair Value Disclosure Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Preferred stock, par value (in USD per share) Preferred Stock, Par or Stated Value Per Share Asia Pacific Asia Pacific [Member] Purchases of property, equipment, leasehold improvements and internal-use software Capital expenditures Payments to Acquire Property, Plant, and Equipment City Area Code City Area Code Document Period End Date Document Period End Date Debt Long-term Debt [Text Block] Capital shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Schedule of dividends declared Dividends Declared [Table Text Block] Disaggregation of revenue Disaggregation of Revenue [Table Text Block] Income before income taxes Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Hedging Designation [Axis] Hedging Designation [Axis] Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Other financing activities Proceeds from (Payments for) Other Financing Activities Designated as hedging instrument Designated as Hedging Instrument [Member] Vesting of restricted stock Restricted Stock, Value, Shares Issued Net of Tax Withholdings Cover page. Cover [Abstract] Long-term purchase commitment period Long-term Purchase Commitment, Period Acquisitions Goodwill, Acquired During Period Other income (expense) Other Expenses [Abstract] Schedule of income taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Approved addition to authorized amount Stock Repurchase Program, Amount Added To Authorized Amount Stock Repurchase Program, Amount Added To Authorized Amount Goodwill [Line Items] Goodwill [Line Items] Long-term debt Long-term debt Long-term Debt Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Deferred fees Increase (Decrease) in Contract with Customer, Liability Leases Lessee, Operating Leases [Text Block] Fair Value Disclosures [Abstract] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Client relationships Customer Relationships [Member] Equity Components [Axis] Equity Components [Axis] Net unrealized (loss) gain on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Share-based Payment Arrangement [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Minimum Minimum [Member] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Current lease liabilities Operating Lease, Liability, Current Schedule of assumptions about stock options Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Entity Interactive Data Current Entity Interactive Data Current Americas UNITED STATES Maximum amount of additional borrowings fds_LineOfCreditFacilityMaximumAmountOfAdditionalBorrowings The maximum aggregate amount of additional borrowings which is allowed under the credit facility provided that such request for additional borrowings meet the minimum borrowing requirement. CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Interest rate swap agreement Interest Rate Swap [Member] Entity Registrant Name Entity Registrant Name Subsequent Event Type [Domain] Subsequent Event Type [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] Weighted average discount rate (incremental borrowing rate) Operating Lease, Weighted Average Discount Rate, Percent Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Maximum contribution limit fds_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumContributionLimit The maximum amount of contributions per share-based compensation plan during the offering period. Number of reportable segments Number of Reportable Segments Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Accounts receivable, net of reserves of $5,903 at February 28, 2021 and $7,987 at August 31, 2020 Accounts Receivable, after Allowance for Credit Loss, Current Total Lessee, Operating Lease, Liability, to be Paid Remaining lease terms Lessee, Operating Lease, Remaining Lease Term Common stock issued for employee stock plans (in shares) Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture Entity Address, Postal Zip Code Entity Address, Postal Zip Code Purchase price percentage Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Goodwill Beginning Balance Ending Balance Goodwill Other comprehensive gain (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Document Transition Report Document Transition Report Other non-current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Derivative Assets Derivative Asset, Fair Value, Gross Asset Taxes payable, net of prepaid taxes Increase (Decrease) in Income Taxes Payable Level 2 Fair Value, Inputs, Level 2 [Member] Document Quarterly Report Document Quarterly Report Vesting [Axis] Vesting [Axis] Schedule of goodwill Schedule of Goodwill [Table Text Block] Asset Class [Domain] Asset Class [Domain] Equity [Abstract] Assets, fair value Total assets measured at fair value Assets, Fair Value Disclosure EMEA EMEA [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] PRSUs Performance Based Restricted Stock [Member] Performance Based Restricted Stock Fixed rate Derivative, Fixed Interest Rate Deferred revenue Contract with Customer, Liability, Current Exercise price (in USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Entities [Table] Entities [Table] Derivative Contract [Domain] Derivative Contract [Domain] Diluted weighted average common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Mutual funds Mutual Fund [Member] Basic earnings per common share (in USD per share) Earnings Per Share, Basic Expected life Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Number of operating segments Number of Operating Segments Entity File Number Entity File Number Debt Disclosure [Abstract] Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Net cash used by financing activities Net Cash Provided by (Used in) Financing Activities Dividends declared Dividends, Common Stock Stock-based compensation expense Share-based Payment Arrangement, Expense Depreciation and amortization Other Depreciation and Amortization Balance Sheet Location [Axis] Balance Sheet Location [Axis] Common stock, $0.01 par value, 150,000,000 shares authorized, 40,943,660 and 40,767,708 shares issued, 37,844,998 and 38,030,252 shares outstanding at February 28, 2021 and August 31, 2020, respectively Common Stock, Value, Issued Goodwill and Intangible Assets Disclosure [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Discontinuance of cash flow hedges Gain (Loss) on Discontinuation of Foreign Currency Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net Entity Current Reporting Status Entity Current Reporting Status PNC Bank, National Associations PNC Bank, National Associations [Member] Represents information about PNC Bank, National Associations as company's lender. Common stock issued for employee stock plans (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Weighted average grant date fair value (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Award vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Lease liabilities Present value Operating Lease, Liability Segment Reporting [Abstract] Interest expense, net Interest Expense [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Accounts receivable, net of reserves Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] TOTAL STOCKHOLDERS’ EQUITY Beginning balance Ending balance Total AOCL Stockholders' Equity Attributable to Parent Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Description of Business Nature of Operations [Text Block] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Foreign deferred tax benefit Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Net unrealized (loss) gain on cash flow hedges, tax expense (benefit) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Entity Address, City or Town Entity Address, City or Town Accrued compensation Employee-related Liabilities, Current Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restricted stock units Restricted Stock Units (RSUs) [Member] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Maximum employee subscription rate Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Hedging Relationship [Axis] Hedging Relationship [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Proceeds from maturity or sale of investments Proceeds from Sale, Maturity and Collection of Investments Estimated acquisition date useful life Finite-Lived Intangible Asset, Useful Life Equity Component [Domain] Equity Component [Domain] Schedule of pre-tax effect of derivative instruments in cash flow hedging relationships Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Weighted average interest rate Line of Credit Facility, Interest Rate at Period End Dividend payments Payments of Dividends LIABILITIES Liabilities [Abstract] Property, equipment and leasehold improvements, net Property, Plant and Equipment, Net Entity Tax Identification Number Entity Tax Identification Number Interest expense, net Interest Income (Expense), Nonoperating, Net Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Stock Based Compensation Share-based Payment Arrangement [Text Block] Net income Net income Net Income (Loss) Attributable to Parent Changes in assets and liabilities, net of effects of acquisitions Increase (Decrease) in Operating Capital [Abstract] 2021 (remaining six months) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Trade names Trade Names [Member] Leases [Abstract] Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Operating expenses Operating Expenses [Abstract] Goodwill Goodwill Disclosure [Text Block] Earnings Per Share [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] ESPP Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan The Nasdaq Stock Market NASDAQ - 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Certificates of deposit Certificates of Deposit [Member] Deferred revenue, non-current Contract with Customer, Liability, Noncurrent Income available to common stockholders plus assumed conversions Net Income (Loss) Available to Common Stockholders, Diluted Supplier Concentration Risk Supplier Concentration Risk [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Number of share purchased by employees (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares of common stock outstanding Schedule of Stockholders Equity [Table Text Block] Entity Filer Category Entity Filer Category Common Stock Common Stock [Member] Accumulated foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Total Amount Dividends, Cash Supplier [Axis] Supplier [Axis] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Dividends payable Dividends Payable, Current Corporate money market funds Money Market Funds [Member] Diluted EPS Earnings Per Share, Diluted [Abstract] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Acquisition Business Combination Disclosure [Text Block] Hedging Relationship [Domain] Hedging Relationship [Domain] Dilutive effect of stock options and restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Schedule of future minimum commitments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Stock options Share-based Payment Arrangement, Option [Member] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Basic weighted average common shares (in shares) Weighted Average Number of Shares Outstanding, Basic Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Treasury stock (in shares) Treasury Stock, Shares Cash flow hedging Cash Flow Hedging [Member] Plan Name [Domain] Plan Name [Domain] LTIP LTIP [Member] Information pertaining to the Long Term Incentive Plan ("LTIP"). Revenue Recognition Revenue from Contract with Customer [Text Block] Lease ROU assets obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Additional paid-in capital Additional Paid in Capital Long-term debt, fair value Long-term Debt, Fair Value Provision for income taxes Provision for income taxes Income Tax Expense (Benefit) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Total liabilities measured at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Diluted earnings per common share (in USD per share) Earnings Per Share, Diluted Local Phone Number Local Phone Number Derivative Instruments and Hedging Activities Disclosure [Abstract] Share-based Payment Arrangement, Tranche One Share-based Payment Arrangement, Tranche One [Member] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Schedule of debt obligations Schedule of Debt [Table Text Block] 2019 Revolving Credit Facility Debt obligations Long-term Debt, Gross Entity Address, Address Line One Entity Address, Address Line One Common stock issued for employee stock plans Shares Issued, Value, Share-based Payment Arrangement, before Forfeiture Entity Emerging Growth Company Entity Emerging Growth Company Derivative Liabilities Derivative Liability, Fair Value, Gross Liability Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Maximum Maximum [Member] Cost of services Operating Costs and Expenses Other non-current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Fair Value Measures Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Retained Earnings Retained Earnings [Member] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Recent Accounting Pronouncements Significant Accounting Policies [Text Block] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Purchases of investments Payments to Acquire Investments Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Domain] Award Type [Domain] Trading Symbol Trading Symbol Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] One supplier One Supplier [Member] One Supplier Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Treasury stock, at cost: 3,098,662 and 2,737,456 shares at February 28, 2021 and August 31, 2020, respectively Treasury Stock, Value Earnings Per Share Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Entity Shell Company Entity Shell Company Data costs Cost of Goods and Service Benchmark [Member] Number of shares repurchased in settlement of employee tax withholding obligations (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Fair value Fair Value, Recurring [Member] New Accounting Standards or Updates Recently Adopted, and Recent Accounting Standards or Updates Not Yet Effective New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Basic EPS Earnings Per Share, Basic [Abstract] Investments Short-term Investments