Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net income available to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Property, plant, and equipment, amortization expense Property, Plant, And Equipment, Amortization Expense Property, Plant, And Equipment, Amortization Expense Cost of other Cost Of Other Services [Policy Text Block] Cost of Other Services [Policy Text Block] Average interest rate Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Schedule of Reconciliation of Beginning and Ending Amount of Gross Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Accrued compensation and related liabilities Employee-related Liabilities, Current State and local income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Schedule of Other Assets [Table] Schedule of Other Assets [Table] This element represents details of other assets. Employee Benefit Plans Retirement Benefits [Text Block] Line of credit facility, accordion feature, increase limit (up to) Line Of Credit Facility, Accordion Feature, Increase Limit Line Of Credit Facility, Accordion Feature, Increase Limit Insurance reserve Accrued Insurance, Current Derivative Instrument [Axis] Derivative Instrument [Axis] Business combination consideration transferred equity interests issued and issuable right to receive cash per acquiree share (in dollars per share) Business Combination Consideration Transferred Equity Interests Issued And Issuable Right To Receive Cash Per Acquiree Share Business Combination Consideration Transferred Equity Interests Issued And Issuable Right To Receive Cash Per Acquiree Share Vesting of stock-based compensation awards (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Current income tax expense Current Income Tax Expense (Benefit) Average price per share (in dollars per share) Average Price per Share (in dollars per share) Shares Acquired, Average Cost Per Share Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Amortization of intangible assets and capitalized contract costs Amortization Leases [Abstract] Leases [Abstract] Insurance reserve Liability Reserve Estimate, Policy [Policy Text Block] Foreign tax effects Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Long-term liabilities: Liabilities, Noncurrent [Abstract] Outstanding, beginning of period (in shares) Outstanding, end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Service contracts Service Agreements [Member] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Schedule of Information Related to Stock Options Outstanding Share-Based Payment Arrangement, Activity [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Debt due within one year Long-Term Debt and Lease Obligation, Current [Abstract] Total current liabilities Liabilities, Current Work in process Inventory, Work in Process, Net of Reserves Bridge Loan Merger Bridge Loan Merger [Member] Bridge Loan Merger Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Entity Address, City or Town Entity Address, City or Town Effect of cross-border tax laws Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Percent Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Foreign Plan Foreign Plan [Member] Balance at the beginning of the period Balance at the end of the period Total future amortization expense Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Revenue Revenue Benchmark [Member] Noncash Share Repurchase Transaction Noncash Share Repurchase Transaction [Member] Noncash Share Repurchase Transaction United States Plan UNITED STATES Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Long-lived assets Long-Lived Asset, Excluding Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block] Other Other Products And Services [Member] Other Products and Services [Member] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Schedule of Information Related to Operating Segments Segment Reporting [Table Text Block] Use of estimates Use of Estimates, Policy [Policy Text Block] Revenue recognition Revenue from Contract with Customer [Policy Text Block] Other comprehensive income (loss), net of tax expense of $959, $249 and $5,070, respectively Comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Contractual Future Minimum Lease Payments of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Range of Exercise Prices, upper limit (in dollars per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit Document Period End Date Document Period End Date Preferred stock, shares outstanding ( in shares) Preferred Stock, Shares Outstanding Basic Earnings per Share Earnings Per Share, Basic [Abstract] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Share Buyback Program October 28 2025 Share Buyback Program October 28 2025 [Member] Share Buyback Program October 28 2025 Debt term Debt Instrument, Term Schedule of Reconciliation of Total Segment Operating Income to Net Income Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] Treasury stock: 2026: 379,390 shares 2025: 373,988 shares Treasury Stock, Common, Value Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Other comprehensive income (loss), tax expense Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Income tax paid, federal, after refund received Income Tax Paid, Federal, after Refund Received Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Operating lease liabilities, current Operating Lease, Liability, Current Earnings per Share Earnings Per Share [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Trading Symbol Trading Symbol Capital expenditures Payments to Acquire Property, Plant, and Equipment Reconciliation of Unrecognized Tax Benefits [Roll Forward] Unrecognized Tax Benefits [Roll Forward] Schedule of Interest Rate Lock Agreements Schedule of Interest Rate Derivatives [Table Text Block] Income taxes, current Accrued Income Taxes, Current Schedule of Purchase Price Allocation Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Diluted Earnings per Share Earnings Per Share, Diluted [Abstract] Changes in unrecognized tax benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Credit Facility [Domain] Credit Facility [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Foreign operations Income (Loss) from Continuing Operations before Income Taxes, Foreign Dividends Dividends Payable, Current Required years of service for plan eligibility Defined Benefit Plan, Eligibility, Required Years Of Service Defined Benefit Plan, Eligibility, Required Years Of Service Share Repurchase Programs Share Repurchase Programs [Member] Share Repurchase Programs [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Property and equipment, useful lives Property, Plant, and Equipment, Useful Life Weighted Average Exercise Price (in dollars per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price Goodwill deductible for tax purposes Business Combination, Goodwill, Expected Tax Deductible, Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Gross margin Gross Profit Deferred tax liabilities: Deferred Tax Liabilities, Net [Abstract] Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Intrinsic value of options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Cash equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Effect of dilutive securities - employee stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Depreciation Depreciation Outstanding, beginning of period (in dollars per share) Outstanding, end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset Range 4 Range 4 [Member] Range 4 [Member] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Total fair value of net assets acquired, net of cash acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Borrowings on revolving credit facility Long-Term Line of Credit Dividends paid Payments of Ordinary Dividends, Common Stock Deferred compensation and other Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Expiration Date Trading Arrangement Expiration Date Foreign Current Foreign Tax Expense (Benefit) Maturities of long term debt, year four Long-Term Debt, Maturity, Year Four State and local Current State and Local Tax Expense (Benefit) Restricted cash Restricted Cash and Cash Equivalent Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Buildings Building [Member] Buildings and improvements Building and Building Improvements [Member] Options exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Range 3 Range 3 [Member] Range 3 [Member] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Entity Voluntary Filers Entity Voluntary Filers Unrecognized compensation cost related to unvested stock options and restricted stock Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Segments [Domain] Segments [Domain] Property and equipment Property, Plant, and Equipment [Policy Text Block] UniFirst Corporation UniFirst Corporation [Member] UniFirst Corporation Building improvements Building Improvements [Member] Business Combination [Table] Business Combination [Table] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Business Combination and Asset Acquisition [Abstract] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Operating lease liabilities Deferred Tax Assets, Operating Lease Liabilities Deferred Tax Assets, Operating Lease Liabilities Interest rate Interest rate Debt Instrument, Interest Rate, Stated Percentage Dividends Dividends, Common Stock, Cash Total shareholders' equity Beginning balance Ending balance Equity, Attributable to Parent Incurred transaction expenses Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Incurred Assets Assets [Abstract] Schedule of Earnings Per Share, Basic and Diluted by Stock Class [Table] Schedule of Earnings Per Share, Basic and Diluted by Stock Class [Table] Complete disclosure pertaining to an entity's basic and diluted earnings per share. Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Insider Trading Policies and Procedures [Line Items] Allowance on accounts receivable Accounts Receivable, Allowance for Credit Loss, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Deferred Deferred Income Tax Expense (Benefit) Other nontaxable and nondeductible items, net Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Options granted excluded from the computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Deferred commissions noncurrent Capitalized Contract Cost, Net, Noncurrent Schedule of Changes in Carrying Amount of Goodwill by Operating Segment Goodwill [Table Text Block] Auditor Location Auditor Location Entity CIK Entity Central Index Key Accumulated depreciation Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Business combination, consideration transferred, equity interests issued and issuable, entity shares issued per acquiree share (in shares) Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Income taxes at the U.S. federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Other, net of tax expense of $1,244, $332 and $867, respectively Other Comprehensive Income (Loss), Other Adjustments, Net Of Tax Other Comprehensive Income (Loss), Other Adjustments, Net Of Tax Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of Components of Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Fair value of vested stock options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Uniform Direct Sales Uniform Direct Sales Segment [Member] Uniform Direct Sales [Member] Restricted Stock Awards Restricted Stock [Member] Other Accumulated Comprehensive Income Other comprehensive Income Total AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Pension plans Pension and Other Postretirement Plans, Policy [Policy Text Block] Balance at Beginning of Year Balance at End of Year SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Finished goods Inventory, Finished Goods, Net of Reserves Weighted-average period of time unrecognized compensation cost will be recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Litigation and other contingencies Commitments and Contingencies, Policy [Policy Text Block] Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Defined Benefit Plan [Table] Defined Benefit Plan [Table] Schedule of Components of Deferred Income Taxes Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Schedule of Assumptions Used to Determine Fair Value of Options Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Operating Segments Operating Segments [Member] Weighted-average fair value of stock options granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Interest expense Amortization of interest rate locks Interest expense Interest Expense, Nonoperating Total fair value of liabilities assumed Business Combination, Recognized Liability Assumed, Liability Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Foreign tax effects Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Other comprehensive (loss) income before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent PEO PEO [Member] Maturities of long term debt, year two Long-Term Debt, Maturity, Year Two Debt carrying value Debt, Long-Term and Short-Term, Combined Amount Canceled (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Goodwill Balance at the beginning of the period Balance at the end of the period Net goodwill recognized Goodwill Retirement Plan Type [Axis] Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Changes in unrecognized tax benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Retained Earnings Retained Earnings [Member] Operating lease liabilities Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Internal use software Software, In-Development, Internally Developed, and Purchased [Member] Fair value measurements Fair Value Measurement, Policy [Policy Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign Currency Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Corporate debt Corporate Debt Securities [Member] Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Other Accumulated Other Adjustment, Attributable to Parent [Member] Accumulated Other Adjustment, Attributable to Parent [Member] Derivatives and hedging activities Derivatives, Methods of Accounting, Hedging Derivatives [Policy Text Block] Service contracts and other assets Service Contacts and Other Assets [Member] Service Contacts and Other Assets [Member] Prepaid expenses and other current assets and capitalized contract costs Increase (Decrease) in Prepaid Expense and Other Assets Accrued compensation and related liabilities Increase (Decrease) in Employee Related Liabilities Amortization of intangible assets Intangible Asset, Finite-Lived, Amortization Expense Service contracts Intangible Asset, Finite-Lived [Line Items] Intangible Asset, Finite-Lived [Line Items] Service contracts acquired Intangible Asset, Finite-Lived, Acquired Revenue Revenue from Contract with Customer, Excluding Assessed Tax Senior Notes 3.11%, 2025 Maturity Senior Notes 3.11%, 2025 Maturity [Member] Senior Notes 3.11%, 2025 Maturity Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Uniform Rental and Facility Services, First Aid and Safety Services and Fire Protection Services Uniform Rental And Facility Services, First Aid And Safety Services and Fire Protection Services Segment [Member] Uniform Rental and Facility Services, First Aid and Safety Services and Fire Protection Services [Member] International securities Defined Benefit Plan, Equity Securities, Non-US [Member] Construction in progress Construction in Progress [Member] Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] Exercise Price Range [Axis] State and local income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Other nontaxable and nondeductible items, net Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Auditor Firm ID Auditor Firm ID Operating income Total segment operating income Operating Income (Loss) Foreign tax payments Income Tax Paid, Foreign, after Refund Received Acquisitions Business Combination [Text Block] Service contracts and other assets Service Contracts And Other Assets [Policy Text Block] Service Contracts and Other Assets [Policy Text Block] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Common stock, shares issued (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Treasury locks Deferred Tax Liabilities, Treasury Locks Deferred Tax Liabilities, Treasury Locks Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Accounts receivable, net Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Fair value of service contracts acquired Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Income taxes at the U.S. federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Stock split ratio, common stock Stockholders' Equity Note, Stock Split, Conversion Ratio Award expiration term Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Unrecognized tax benefits, interest and penalties accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Accrued liabilities Accrued liabilities Accrued Liabilities, Current Entity Public Float Entity Public Float Fair Value as of Grant Date Award Grant Date Fair Value Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Consolidation Items [Axis] Consolidation Items [Axis] Deferred commissions current Capitalized Contract Cost, Net, Current Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Service contracts, carrying amount Intangible Asset, Finite-Lived, before Accumulated Amortization Other assets, net: Other Assets [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Options vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Canceled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Goodwill [Roll Forward] Goodwill [Roll Forward] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Weighted-average remaining contractual term of stock options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Fair Value Disclosures Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] U.S. government securities US Government Agencies Debt Securities [Member] Share Buyback Program July 23 2024 Share Buyback Program July 23 2024 [Member] Share Buyback Program July 23 2024 Expected life of the option in years Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Statute expirations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Repurchase of common stock (in shares) Stock purchased under share buyback (in shares) Shares (in shares) Shares (in shares) Treasury Stock, Shares, Acquired Accrued liabilities and other Increase (Decrease) in Accrued Liabilities Permanent differences Effective Income Tax Rate Reconciliation, Adjustments For Permanent Differences, Amount Effective Income Tax Rate Reconciliation, Adjustments For Permanent Differences, Amount Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Weighted Average Exercise Price (in dollars per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price Total purchase price of shares repurchased Purchase Price Treasury Stock, Value, Acquired, Cost Method Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Non-NEOs Non-NEOs [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Senior Notes, 3.70%, 2027 Maturity Senior Notes, 3.70%, 2027 Maturity [Member] Senior Notes, 3.70%, 2027 Maturity [Member] Schedule of Outstanding Debt Schedule of Debt [Table Text Block] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Leases Lessee, Operating Leases [Text Block] Maturities of long term debt, year one Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Repurchase of common stock Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Cost of sales Cost of Revenue Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Maximum term after grant options may be exercised Share-based Compensation Arrangement By Share Based Payment Award, Award Exercises After Grant Term Maximum Share-based Compensation Arrangement By Share Based Payment Award, Award Exercises After Grant Term Maximum Number of reporting units Goodwill, Reporting Unit, Number Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Noncompete agreements and other Noncompete Agreements And Other [Member] Noncompete Agreements And Other Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Operating lease costs Operating Lease, Cost Uniform rental and facility services Uniform Rental and Facility Services Uniform Rental And Facility Services Segment [Member] Uniform Rental and Facility Services [Member] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Current: Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Accounts receivable Receivable [Policy Text Block] Foreign currency translation Goodwill, Foreign Currency Translation, Gain (Loss) Number of reportable segments not disclosed Number Of Reportable Segments Not Disclosed Flag Number Of Reportable Segments Not Disclosed Flag Number of businesses acquired Business Combination, Number of Businesses Acquired Total liabilities and shareholders' equity Liabilities and Equity Schedule of Changes in Carrying Amount of Service Contracts by Operating Segment Schedule of Service Contracts Finite Lived Intangible Assets by Operating Segment [Table Text Block] Tabular disclosure of changes in the carrying amount of service contracts finite-lived intangible assets by operating segment. Stock Options Share-Based Payment Arrangement, Option [Member] Supplemental Executive Retirement Plan (SERP) Supplemental Employee Retirement Plan [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Inventories useful life Inventories, Useful Life Inventories, Useful Life Tabular List, Table Tabular List [Table Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate intrinsic value of outstanding options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Number of businesses helped Number Of Business Clients Number Of Business Clients Other assets, carrying amount Other Assets, Gross This element represents the gross carrying amount, as of the balance sheet date, of finite-lived assets and other noncurrent assets. Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Amortization of interest rate lock agreements - decrease to other comprehensive income Other Comprehensive Income (Loss), Amortization Of Interest Rate Lock Agreements, Net Of Tax Other Comprehensive Income (Loss), Amortization Of Interest Rate Lock Agreements, Net Of Tax Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock, no par value: 100 shares authorized, none outstanding Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Schedule of Asset Allocations in the Pension Plan Schedule of Allocation of Plan Assets [Table Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Selling and administrative expenses Selling, General and Administrative Expenses, Policy [Policy Text Block] Less: net income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Senior Notes, 4.00%, 2032 Maturity Senior Notes, 4.00%, 2032 Maturity [Member] Senior Notes, 4.00%, 2032 Maturity Credit Facility [Axis] Credit Facility [Axis] Total assets at fair value Assets, Fair Value Disclosure Schedule II - Valuation and Qualifying Accounts and Reserves SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Name Measure Name Pay vs Performance Disclosure [Line Items] Service contracts [Roll Forward] Finite Lived Intangible Assets, Net [Roll Forward] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] All Other Other Operating Segment [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] U.S. operations Income (Loss) from Continuing Operations before Income Taxes, Domestic Equipment Equipment [Member] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Cost of uniform rental and facility services Cost Of Rental Uniforms And Facility Services [Policy Text Block] Cost of Rental Uniforms and Facility Services [Policy Text Block] Insurance reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Insurance and Contingencies Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Insurance and Contingencies Raw materials Inventory, Raw Materials, Net of Reserves Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Stock options exercised (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Unrecognized tax benefits that would impact effective tax rates if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Maturities of long term debt, year five Long-Term Debt, Maturity, Year Five Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Uniforms and other rental items in service Uniforms And Other Rental Items In Service [Policy Text Block] Uniforms and Other Rental Items In Service [Policy Text Block] Goodwill, Service Contracts and Other Assets Goodwill Service Contracts And Other Assets Disclosure [Text Block] This element encapsulates entire disclosures pertaining to goodwill, service contracts and other assets. SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Deferred tax assets, gross Deferred Tax Assets, Gross Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Bridge Loan Bridge Loan [Member] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Senior Notes, 3.45%, 2025 Maturity Senior Notes, 3.45%, 2025 Maturity [Member] Senior Notes, 3.45%, 2025 Maturity Senior Notes, 4.20%, 2028 Maturity Senior Notes, 4.20%, 2028 Maturity [Member] Senior Notes, 4.20%, 2028 Maturity Stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Revenue: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Weighted average amortization period Intangible Asset, Finite-Lived, Remaining Amortization Period Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus UniFirst Corporation transaction expenses Business Combination, Acquisition-Related Cost, Expense Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Common stock, no par value, and paid-in capital: 1,700,000 shares authorized 2026: 779,537 shares issued and 400,147 shares outstanding 2025: 776,936 shares issued and 402,948 shares outstanding Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Restatement Determination Date Restatement Determination Date Tax jurisdiction of domicile Tax Jurisdiction of Domicile [Extensible Enumeration] Schedule of Reconciliation of Income Tax Expense Using the Statutory Rate and Actual Income Tax Expense Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Repurchase of common stock Repurchase of common stock Treasury Stock, Value, Acquired, Cost Method, And Share Based Payment Arrangement, Decrease For Tax Withholding Obligation Treasury Stock, Value, Acquired, Cost Method, And Share Based Payment Arrangement, Decrease For Tax Withholding Obligation Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Current liabilities: Liabilities, Current [Abstract] Earnings Per Share, Basic and Diluted [Line Items] Earnings Per Share, Basic and Diluted [Line Items] Total long-term liabilities Liabilities, Noncurrent Deferred income taxes Increase (Decrease) in Deferred Income Taxes Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant, and Equipment [Abstract] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province Share Buyback Program July 26 2022 Share Buyback Program July 26 2022 [Member] Share Buyback Program July 26 2022 Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent PEO Total Compensation Amount PEO Total Compensation Amount Capital expenditures Segment Reporting, Long-Lived Asset, Expenditure for Addition Share-based Payment Arrangement, Noncash Expense [Abstract] Share-Based Payment Arrangement, Noncash Expense [Abstract] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Basic weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Additions for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Notional amount Derivative, Notional Amount Inventory obsolescence reserve Inventory Valuation Reserves Other assets, accumulated amortization Accumulated Amortization of Other Assets This element represents the accumulated amortization of finite-lived assets and other noncurrent assets. SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Net income available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Service contracts, accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Revolving credit facility, maximum borrowing capacity with accordion feature Line of Credit Facility, Maximum Borrowing Capacity Debt due within one year Total debt due within one year Long-Term Debt, Current Maturities Income tax credits and adjustments Payments To Acquire Transferable Tax Credits Payments To Acquire Transferable Tax Credits Accrued liabilities Accrued Liabilities [Policy Text Block] Accrued Liabilities Uniform and other rental items in service Deferred Tax Liabilities, Inventory Deferred Tax Liabilities, Inventory New accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Land Land [Member] Gain on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Change in fair value of interest rate lock agreements, tax expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Domestic Plan Domestic Plan [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Schedule of Current Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Total debt due after one year Long-Term Debt Estimated legal reserves Estimated Litigation Liability, Current Property and Equipment Property, Plant, and Equipment [Text Block] Change in current assets and liabilities, net of acquisitions of businesses: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Beginning balance Ending balance Unrecognized Tax Benefits Other information related to operating leases Lessee, Operating Lease, Additional Information [Abstract] Lessee, Operating Lease, Additional Information [Abstract] Costs and expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Inventory reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Inventory Reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Inventory Reserves Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Business combination, price of acquisition, expected Business Combination, Price of Acquisition, Expected Number of shares authorized under plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Employee benefit related liabilities Employee Related Liabilities, Current, Defined Contribution Plans And Profit Sharing Employee Related Liabilities, Current, Defined Contribution Plans And Profit Sharing Accrued interest Interest Payable, Current Schedule of Property and Equipment Estimated Useful Lives Schedule of Property and Equipment Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Range 1 Range 1 [Member] Range 1 [Member] Share Buyback Program July 27 2021 Share Buyback Program July 27 2021 [Member] Share Buyback Program July 27 2021 Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Average Remaining Option Life Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted-Average Remaining Contractual Term Debt due after one year, gross Aggregate principal amount Long-Term Debt, Gross Uniforms and other rental items in service Uniforms and Other Rental Items in Service Aggregate carrying value as of the balance sheet date of the Rental Uniforms and Ancillary Products operating segment inventory, valued at cost less amortization, calculated using the straight-line method. Noncompete and consulting Noncompete Agreements [Member] Debt issuance costs Debt, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Amortization of deferred commissions Capitalized Contract Cost, Amortization Individual: Individual [Axis] Diluted weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commercial paper Commercial Paper [Member] Range of Exercise Prices, lower limit (in dollars per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit Number Exercisable (in shares) Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable Less interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent Debt due within one year Short-Term Debt Total contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Treasury Stock   Treasury Stock, Common [Member] Letters of credit outstanding, amount Letters of Credit Outstanding, Amount Total payments Lessee, Operating Lease, Liability, to be Paid Outstanding beginning of period (in dollars per share) Outstanding end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value All Executive Categories All Executive Categories [Member] Interest rate lock agreements Interest Rate Lock Commitments [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other comprehensive (loss) income, net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Exercise Price Range [Domain] Exercise Price Range [Domain] Debt issuance costs Debt Issuance Costs, Current, Net Schedule of Computation of Basic and Diluted Earnings Per Share For Continuing Operations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Operating Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Auditor Name Auditor Name Schedule of Disaggregated Revenue Disaggregation of Revenue [Table Text Block] Schedule of Finite-lived Intangible Assets Amortization Expense Intangible Asset, Finite-Lived, Amortization Expense [Table Text Block] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Business Combination [Line Items] Business Combination [Line Items] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Service contracts and other assets useful lives Intangible Asset, Finite-Lived, Useful Life Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Schedule of Restricted Stock Awards Granted and Outstanding Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Intangibles and other amortizable assets Deferred Tax Liabilities, Intangible Assets Exercise Price Award Exercise Price Disclosures related to operating segments Segment Reporting [Line Items] Share buyback program, authorized amount Share Repurchase Program, Authorized, Amount Capitalized contract costs Capitalized Contract Cost [Member] Capitalized Contract Cost [Member] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Net operating loss and foreign related carry-forwards Deferred Tax Assets, Operating Loss Carryforwards, Foreign Municipal obligations US States and Political Subdivisions Debt Securities [Member] Income taxes, current Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Common Stock and Paid-In Capital   Common Stock Including Additional Paid in Capital [Member] Repayment of debt Repayments of Long-Term Debt Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Fire Protection Services Fire Protection Services Segment [Member] Fire Protection Services [Member] Equity Component [Domain] Equity Component [Domain] Other Assets [Domain] Other Assets [Domain] This element represents details of other assets. Adoption Date Trading Arrangement Adoption Date Inventories, net Inventory, Policy [Policy Text Block] Debt, Derivatives and Hedging Activities Debt, Derivatives Instruments and Hedging Activities Disclosure [Text Block] Information about whether or not the entity is in compliance with debt covenants and the effects of noncompliance with debt covenants; and the entity's entire derivative instruments and hedging activities disclosure as a single block of text which describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Total present value of lease payments Operating Lease, Liability Accrued liabilities Accounts Payable and Accrued Liabilities, Noncurrent Outstanding, beginning of period (in shares) Outstanding, end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number U.S. securities Defined Benefit Plan, Equity Securities, US [Member] Other, net Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Selling and administrative expenses Selling, General and Administrative Expense Business Combination [Domain] Business Combination [Domain] Letter of Credit Letter of Credit [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Construction in progress, gross Construction in Progress, Gross Debt issuance costs Debt Issuance Costs, Noncurrent, Net All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination [Axis] Business Combination [Axis] Effect of cross-border tax laws Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Amount Income taxes Income Tax, Policy [Policy Text Block] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Shareholders' equity: Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Deferred tax assets: Deferred Tax Assets, Net [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] City Area Code City Area Code Debt fair value Debt Instrument, Fair Value Disclosure Vesting period of awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Vesting Period Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted Average Grant Price Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Capitalized contract costs Commissions Expense, Policy [Policy Text Block] Deferred purchase price consideration Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Deferred Purchase Price Consideration Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Deferred Purchase Price Consideration Capitalized contract costs Deferred Tax Liabilities, Deferred Expense, Capitalized Contract Costs Deferred Tax Liabilities, Deferred Expense, Capitalized Contract Costs Projected benefit obligation Defined Benefit Plan, Benefit Obligation Net deferred tax liability Deferred Tax Liabilities, Net Share-based compensation Share-Based Payment Arrangement, Expense Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Business Combination, Series of Individually Immaterial Business Combinations Business Combination, Series of Individually Immaterial Business Combinations [Member] Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Goodwill acquired Goodwill, Acquired During Period Route servicing fees Route Servicing Fees [Member] Route Servicing Fees Cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investments Investments Granted (in dollars 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 Subsequent Event Type [Domain] Subsequent Event Type [Domain] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Debt issuance costs Payments of Debt Issuance Costs Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Shares acquired for taxes due Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Service contracts amortization Finite Lived Intangible Assets Amortization Amount of reduction of finite-lived intangible assets due to amortization during the period. Schedule of Business Combination Business Combination [Table Text Block] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Maturities of long term debt, year three Long-Term Debt, Maturity, Year Three Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent State and local payments Income Tax Paid, State and Local, after Refund Received Number Outstanding (in shares) Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding Interest rate lock agreements Derivative assets Derivative Asset Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Underlying Securities Award Underlying Securities Amount Revenue Recognition Revenue from Contract with Customer [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Schedule of Components of Income Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price State taxes and other Deferred Tax Liabilities, State Taxes and Other Deferred Tax Liabilities, State Taxes and Other Proceeds from exercise of stock-based compensation awards Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Other Assets [Axis] Other Assets [Axis] This element represents other noncurrent assets. Other, net Payment for (Proceeds from) Other Investing Activity Inventories, net Increase (Decrease) in Inventories Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Debt due within one year Long Term Debt, Current Maturities, Gross Long Term Debt, Current Maturities, Gross Segment Reporting [Table] Segment Reporting [Table] Audit Information [Abstract] Audit Information [Abstract] Audit Information Schedule of Operating Lease Cost and Additional Lease Information Lease, Cost [Table Text Block] Current portion of capitalized contract costs Other Assets, Current Interest Rate Contract, 2020 Interest Rate Contract, 2020 [Member] Interest Rate Contract, 2020 All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Amortization of interest rate lock agreement, tax benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Operating lease right-of-use assets Deferred Tax Liabilities, Operating Lease Right-Of-Use Assets Deferred Tax Liabilities, Operating Lease Right-Of-Use Assets Current Fiscal Year End Date Current Fiscal Year End Date Goodwill, Service Contracts and Other Assets [Abstract] Goodwill, Service Contracts and Other Assets [Abstract] -- None. No documentation exists for this element. -- Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends declared and paid per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Thereafter Intangible Asset, Finite-Lived, Estimated Amortization Expense, after Year Five Schedule of Stock Options Granted and Outstanding Share-Based Payment Arrangement, Option, Activity [Table Text Block] Range 2 Range 2 [Member] Range 2 [Member] Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Allowance for Credit Losses SEC Schedule, 12-09, Allowance, Credit Loss [Member] Treasury stock, shares (in shares) Beginning balance (in shares) Ending balance (in shares) Treasury Stock, Common, Shares Equity Components [Axis] Equity Components [Axis] Income taxes paid Income Tax Paid, after Refund Received Valuation allowance Deferred Tax Assets, Valuation Allowance Entity Interactive Data Current Entity Interactive Data Current Operating lease right-of-use assets acquired in business combinations Right-Of-Use Asset Obtained In Exchange For Operating Lease Liability, Business Combination Right-Of-Use Asset Obtained In Exchange For Operating Lease Liability, Business Combination Entity Small Business Entity Small Business Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Shares acquired for taxes due (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other assets, net Other assets, net Other Assets, Noncurrent Document Type Document Type Acquisitions of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Senior Notes, 6.15%, 2037 Maturity Senior Notes, 6.15%, 2037 Maturity [Member] Senior Notes, 6.15%, 2037 Maturity [Member] 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] Significant Accounting Policies Significant Accounting Policies [Text Block] Aggregate intrinsic value of exercisable options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Proceeds from issuance of debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number DPSP and RRSP Other Postretirement Benefits Plan [Member] Canada CANADA Deferred tax liabilities Deferred Tax Liabilities, Gross Information regarding service contracts and other assets Other Assets [Line Items] Fair value of other intangibles acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Intangible Assets Additions for tax positions of the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Pre-paid fees Payment for Debt Extinguishment or Debt Prepayment Cost Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Property and equipment, gross Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Executive Category: Executive Category [Axis] Business acquisitions Business Combination [Policy Text Block] Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Net pension liability Liability, Defined Benefit Plan Inventories, net Inventories, net Inventory, Net Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Amortization of interest rate lock agreements, net of tax benefit of $(2,052), $(2,052) and $(2,014), respectively Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Additional shares received in stock split for each share held (in shares) Stockholders' Equity Note, Stock Split, Increased Shares Received Stockholders' Equity Note, Stock Split, Increased Shares Received PEO Name PEO Name Leasehold improvements Leasehold Improvements [Member] Unrealized Income on Interest Rate Locks Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Fair value of tangible assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Foreign currency translation Intangible Asset, Finite-Lived, Foreign Currency Translation Gain (Loss) Total cash consideration for acquisitions, net of cash acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Cash Consideration, Net Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Cash Consideration, Net Change in fair value of interest rate lock agreements, net of tax expense of $1,767, $1,969 and $6,217, respectively Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax The total income tax benefit recognized in the consolidated income statement for share-based compensation arrangements Share-Based Payment Arrangement, Expense, Tax Benefit Product concentration risk Product Concentration Risk [Member] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Accounts payable Increase (Decrease) in Accounts Payable Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Interest Rate Contract, 2022 Interest Rate Contract, 2022 [Member] Interest Rate Contract, 2022 Debt Instrument [Axis] Debt Instrument [Axis] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Basic earnings per share (in dollars per share) Earnings Per Share, Basic Other Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Total current assets Assets, Current Insider Trading Arrangements [Line Items] Debt due after one year Long-Term Debt, Excluding Current Maturities Document Annual Report Document Annual Report Accounts receivable, principally trade, less allowance of $31,648 and $26,357, respectively Accounts Receivable, after Allowance for Credit Loss, Current Schedule of Buyback Activity by Program Class of Treasury Stock [Table Text Block] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Other, tax expense Other Comprehensive Income (Loss), Other Adjustments, Tax Other Comprehensive Income (Loss), Other Adjustments, Tax Expected volatility of Cintas' common stock Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Allowance for credit losses Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Accounts Receivable, Allowance for Credit Loss Uniforms in service Uniforms In Service [Member] Uniforms In Service [Member] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] First Aid and Safety Services First Aid and Safety Services Segment [Member] First Aid and Safety Services [Member] Percentage of revenue Concentration Risk, Percentage Equity Awards Adjustments Equity Awards Adjustments [Member] Schedule of Information Regarding Service Contracts and Other Assets Schedule Of Finite Lived Intangible Assets And Other Assets By Major Class [Table Text Block] Tabular disclosure of amortizable intangible assets and other assets, in total and by major class, including gross carrying amount and accumulated amortization. Repayment of debt Repayments of Senior Debt 2031 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five Purchases of investments Payments to Acquire Investments Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Shares acquired for taxes due, average price (in dollars per share) Share-Based Payment Arrangement, Shares Withheld For Tax Withholding Obligation, Average Cost Share-Based Payment Arrangement, Shares Withheld For Tax Withholding Obligation, Average Cost Less: net income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Total fair value of assets acquired Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Acquired Including Goodwill Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Acquired Including Goodwill Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Investments Investment, Policy [Policy Text Block] Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current 2031 Lessee, Operating Lease, Liability, to be Paid, Year Five Debt due after one year Long-Term Debt and Lease Obligation [Abstract] Service contracts, net Service Contracts Finite Lived Intangible Assets, Net The aggregate sum of gross carrying value of service contracts, less accumulated amortization and any impairment charges. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category Uniforms and other rental items in service Increase (Decrease) in Uniforms and Other Rental Items in Service This element represents the increase (decrease) in cash flows related to uniforms and other rental items in service for the current reporting year. Long-term Debt, Fiscal Year Maturity [Abstract] Long-Term Debt, Fiscal Year Maturity [Abstract] Prepaid expenses and other current assets: Prepaid Expense and Other Assets, Current [Abstract] Stock-based compensation Compensation Related Costs, Policy [Policy Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Entity Address, Address Line Two Entity Address, Address Line Two Current assets: Assets, Current [Abstract] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Operating lease right-of-use assets obtained in exchange for new and renewed operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income taxes Income taxes Tax expense Income taxes Income Tax Expense (Benefit) Principles of consolidation Consolidation, Policy [Policy Text Block] Other rental items Other Rental Items [Member] Other Rental Items [Member] AOCI, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Statement [Table] Statement [Table] Proceeds from stock options exercised Proceeds from Stock Options Exercised Interest income Interest income Investment Income, Interest Stock Compensation Plan Share-Based Payment Arrangement [Member] Federal Current Federal Tax Expense (Benefit)