Accumulated amortization of other intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Adjustment to total reserves related to prior years
Prior Year Claims and Claims Adjustment Expense
Award Timing Predetermined
Award Timing Predetermined [Flag]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Goodwill deductible for tax reporting purposes
Business Combination, Goodwill, Expected Tax Deductible, Amount
Entity File Number
Entity File Number
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Deferred financing costs paid
Payments of Financing Costs
Recognition of deferred revenue
Contract With Customer, Liability, Other, Including New Contract Revenue Recognized
Contract With Customer, Liability, Other, Including New Contract Revenue Recognized
Income from unconsolidated affiliates
Income from unconsolidated affiliates
Income from unconsolidated affiliates
Income (Loss) from Equity Method Investments
Tabular List, Table
Tabular List [Table Text Block]
Net income per common share
Earnings Per Share, Basic [Abstract]
Interest coverage ratio
Debt Instrument, Covenant, Minimum Interest Coverage Ratio
Debt Instrument, Covenant, Minimum Interest Coverage Ratio
Recently Adopted Accounting Standards
New Accounting Pronouncements, Policy [Policy Text Block]
Pledged Status [Axis]
Pledged Status [Axis]
Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis
Fair Value, by Balance Sheet Grouping [Table Text Block]
Costs incurred in excess of amounts billed
Contract with Customer, Asset, after Allowance for Credit Loss, Current
Potential contingent consideration
Business Combination, Consideration Transferred, Liabilities Incurred
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Basic (in USD per share)
Earnings Per Share, Basic
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Trade accounts payable and other accrued liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
REVENUES
Revenue from Contract with Customer [Text Block]
Other comprehensive (loss) / income
Other Comprehensive Income (Loss), Net of Tax
Schedule of Financial Information by Reportable Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Insurance recoverables
Estimated Insurance Recoveries
Costs incurred in excess of amounts billed
Contract With Customer, Asset, Costs Incurred In Excess Of Amounts Billed, Current
Contract With Customer, Asset, Costs Incurred In Excess Of Amounts Billed, Current
Amount of remaining performance obligation
Revenue, Remaining Performance Obligation, Amount
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Capitalized contract price
Contract With Customer, Asset, Increase (Decrease) For New Capitalized Costs
Contract With Customer, Asset, Increase (Decrease) For New Capitalized Costs
Percentage of remaining performance obligation
Revenue, Remaining Performance Obligation, Percentage
Share-based compensation expense
Share-Based Payment Arrangement, Noncash Expense
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
B&I
Business & Industry
Business And Industry [Member]
Business and Industry [Member]
Proceeds from sale of assets
Proceeds from Sale of Productive Assets
Impairment of assets
Asset Impairment Charges
Common stock
Dividends, Common Stock, Cash
Total stockholders’ equity
Balance, beginning of period
Balance, end of period
Equity, Attributable to Parent
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Insider Trading Policies and Procedures [Line Items]
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Revenues
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Interest Rate Swap, Effective 11/1/2022
Interest Rate Swap, Effective 11/1/2022 [Member]
Interest Rate Swap, Effective 11/1/2022
Insurance Policies [Domain]
Insurance Policies [Domain]
Insurance Policies [Domain]
Current assets
Assets, Current [Abstract]
Total liabilities and stockholders’ equity
Liabilities and Equity
Fair Value, Measurements, Recurring
Fair Value, Recurring [Member]
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Cover page.
Cover [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Maximum
Maximum [Member]
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Other intangible assets, net of accumulated amortization of $519.6 and $479.3 at July 31, 2025 and October 31, 2024, respectively
Finite-Lived Intangible Assets, Net
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Pay vs Performance Disclosure [Line Items]
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
ACQUISITIONS
Business Combination [Text Block]
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Shell Company
Entity Shell Company
Contract liabilities, balance at beginning of period
Contract liabilities, balance at end of period
Contract With Customer, Liability, Other, Current
Contract With Customer, Liability, Other, Current
Other noncurrent liabilities
Other Liabilities, Noncurrent
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Accrued taxes — other than income
Accrual for Taxes Other than Income Taxes, Current
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Operating Segments
Operating Segments [Member]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Company Selected Measure Amount
Company Selected Measure Amount
Guarantee obligation
Guarantee Obligation
The total amount of guaranteed energy savings.
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Other noncurrent liabilities
Increase (Decrease) in Other Noncurrent Liabilities
Deferred financing costs
Debt Issuance Costs, Gross
Comprehensive income (loss)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Name
Measure Name
Noncurrent income taxes payable
Accrued Income Taxes, Noncurrent
Current portion of lease liabilities
Operating Lease, Liability, Current
Expansion of amount of authorized repurchases under share repurchase program
Share Repurchase Program, Increase (Decrease) Authorized, Amount
Share Repurchase Program, Increase (Decrease) Authorized, Amount
Deferred income tax liability, net
Deferred Income Tax Liabilities, Net
Document Fiscal Period Focus
Document Fiscal Period Focus
Foreign currency translation and other
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent
Award Timing Method
Award Timing Method [Text Block]
Schedule of Share-based Compensation Arrangement by Share-based Payment Award
Award Type [Axis]
Total assets
Assets
Trading Symbol
Trading Symbol
Medical and dental claim reserves
Medical And Dental Self Insurance Program [Member]
Medical and Dental Self Insurance Program [Member]
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans, net (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Entity Address, City or Town
Entity Address, City or Town
Interest Rate Swap, Effective 7/18/2022
Interest Rate Swap, Effective 7/18/2022 [Member]
Interest Rate Swap, Effective 7/18/2022
Cash flows from operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Technical Solutions
Technical Solutions [Member]
Technical Solutions [Member]
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Restricted stock units
Restricted Stock Units (RSUs) [Member]
Gross term loan
Loans Payable, Noncurrent, Gross
Loans Payable, Noncurrent, Gross
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Entity Emerging Growth Company
Entity Emerging Growth Company
2028
Long-Term Debt, Maturity, Year Three
Common stock, dividends (in USD per share)
Common Stock, Dividends, Per Share, Declared
Other investments
Other Investments
Entity Common Stock, Shares Outstanding (in shares)
Entity Common Stock, Shares Outstanding
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]
Fair Value, Inputs, Level 2
Fair Value, Inputs, Level 2 [Member]
Insurance claim reserves, excluding medical and dental
All Other Claim Types, Excluding Medical And Dental Self Insurance Program [Member]
All Other Claim Types, Excluding Medical And Dental Self Insurance Program
Secured net leverage ratio
Debt Instrument, Covenant, Maximum Secured Net Leverage Ratio
Debt Instrument, Covenant, Maximum Secured Net Leverage Ratio
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Aviation
Aviation [Member]
Aviation [Member]
Business Combination [Domain]
Business Combination [Domain]
Average price paid per share (in USD per share)
Stock Repurchase During Period, Average Cost Per Share
Stock repurchase average cost per share.
Insurance Policies [Axis]
Insurance Policies [Axis]
Insurance Policies [Axis]
Common stock, shares outstanding (in shares)
Balance, beginning of period (in shares)
Balance, end of period (in shares)
Common Stock, Shares, Outstanding
Asset Pledged as Collateral
Asset Pledged as Collateral [Member]
Insurance [Abstract]
Insurance [Abstract]
Provision for bad debt
Accounts Receivable, Credit Loss Expense (Reversal)
PEO
PEO [Member]
Insurance policy coverage, property damage
Property Damage, Policy Limit
Represents the policy limit provided by the insurance program for property damage risks.
Interest Rate Swap, Effective 5/4/2022
Interest Rate Swap, Effective 5/4/2022 [Member]
Interest Rate Swap, Effective 5/4/2022
Income taxes payable
Accrued Income Taxes, Current
Changes in operating assets and liabilities
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
LMC
LMC FM Limited [Member]
LMC FM Limited
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]
Retained Earnings
Retained Earnings [Member]
Maturities of Long-term Debt
Maturities of Long-Term Debt [Abstract]
Pledged Status [Domain]
Pledged Status [Domain]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of period
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Income Statement [Abstract]
Income Statement [Abstract]
Income tax provision
Income Tax Expense (Benefit)
Gain from cash flow hedges recorded in accumulated other comprehensive income (loss), net of tax
OCI, before Reclassifications, before Tax, Attributable to Parent
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Product and Service [Domain]
Product and Service [Domain]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Dividends
Dividends [Abstract]
Unamortized deferred financing costs
Debt Issuance Costs, Current, Net
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Business Combination [Table]
Business Combination [Table]
Notional Amount
Derivative, Notional Amount
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
City Area Code
City Area Code
Purchase of businesses, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
All Trading Arrangements
All Trading Arrangements [Member]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Schedule of Contract Asset and Liability
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Cash flows from investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Net cash provided by operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Line of credit facility, term
Debt Instrument, Term
Schedule of Instruments Used to Collateralize Insurance Obligations
Insurance Disclosure [Table Text Block]
Insurance Disclosure
Preferred stock, par value (in USD per share)
Preferred Stock, Par or Stated Value Per Share
Subsequent Event
Subsequent Event [Member]
Goodwill
Goodwill acquired
Goodwill
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Amount of reasonably possible loss
Loss Contingency, Estimate of Possible Loss
PEO Total Compensation Amount
PEO Total Compensation Amount
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Equity Components [Axis]
Equity Components [Axis]
Standby letters of credit
Standby Letters of Credit [Member]
THE COMPANY AND NATURE OF OPERATIONS
Nature of Operations [Text Block]
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Discount accretion on insurance claims
Accretion Expense
Revenue from External Customer [Line Items]
Revenue from External Customer [Line Items]
Other Performance Measure, Amount
Other Performance Measure, Amount
Current portion of debt, net
Debt, Current
Entity Address, State or Province
Entity Address, State or Province
Repayment of finance lease obligations
Finance Lease, Principal Payments
Total current liabilities
Liabilities, Current
Engineering and Infrastructure Solutions
Engineering And Infrastructure Service Line [Member]
Engineering And Infrastructure Service Line
Litigation Status [Axis]
Litigation Status [Axis]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Individual:
Individual [Axis]
Accumulated depreciation of property, plant and equipment
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization
Dividends paid
Payments of Ordinary Dividends, Common Stock
Other current assets
Other Assets, Current
Additional paid-in capital
Additional Paid in Capital, Common Stock
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net cash used in investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Remaining performance obligation period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
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]
INSURANCE
Insurance Disclosure [Text Block]
Document Fiscal Year Focus
Document Fiscal Year Focus
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Right-of-use assets
Operating Lease, Right-of-Use Asset
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Repayment of borrowings from debt
Repayments of Long-Term Debt
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Assets held in funded deferred compensation plan
Deferred Compensation Plan Assets
Entity Interactive Data Current
Entity Interactive Data Current
Current portion of long-term debt
Long-Term Debt, Current Maturities [Abstract]
Management Reimbursement Revenue by Segment and Remaining Performance Obligations
Revenue from Contract with Customer [Policy Text Block]
SEGMENT INFORMATION
Segment Reporting Disclosure [Text Block]
Debt instrument, periodic payment, principal
Debt Instrument, Periodic Payment, Principal
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]
Letters Of Credit [Table]
Letters Of Credit [Table]
Letters Of Credit [Table]
Schedule of Other Liabilities [Table]
Schedule Of Other Liabilities [Table]
Schedule of Other Liabilities [Table]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Contingent consideration
Business Combination, Contingent Consideration, Liability
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Amortization of intangible assets
Amortization of Intangible Assets
Selling, general and administrative expenses
Selling, General and Administrative Expense
Repurchase of common stock, including excise tax
Total cash paid for share repurchases
Stock Repurchased During Period, Value
Depreciation and amortization
Depreciation, Depletion and Amortization
Other noncurrent assets
Other Assets, Noncurrent
Entity Central Index Key
Entity Central Index Key
PEO Name
PEO Name
Schedule of Long-Term Debt Maturities
Schedule of Maturities of Long-Term Debt [Table Text Block]
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]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Revolving Credit Facility
Revolving Credit Facility [Member]
Arrangement Duration
Trading Arrangement Duration
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Deferred revenue
Contract with Customer, Liability, Current
Segments [Axis]
Segments [Axis]
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Exercise Price
Award Exercise Price
Entity Filer Category
Entity Filer Category
Local Phone Number
Local Phone Number
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Self insurance retention amount per-claim, medical plan
Self Insured Retention, Amount Per Participant, Per Year, For Certain Employee Medical And Dental Programs
Self Insured Retention, Amount Per Participant, Per Year, For Certain Employee Medical And Dental Programs
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Gross term loan
Loans Payable, Current, Gross
Loans Payable, Current, Gross
Schedule of Other Liabilities [Line Items]
Schedule Of Other Liabilities [Line Items]
Schedule of Other Liabilities [Line Items]
Intangibles acquired
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill
Number of technical solutions segments
Number Of Technical Solution Segments
Number Of Technical Solution Segments
Anticipated restructuring charges to be incurred
Restructuring and Related Cost, Expected Cost
ASSETS
Assets [Abstract]
Long-term debt, net
Long-term debt
Long-Term Debt, Excluding Current Maturities
Credit Facility [Axis]
Credit Facility [Axis]
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Debt Instrument [Axis]
Debt Instrument [Axis]
FAIR VALE OF FINANCIAL INSTRUMENTS
Fair Value Disclosures [Text Block]
Business Combination [Line Items]
Business Combination [Line Items]
Credit Facility [Domain]
Credit Facility [Domain]
Stockholders’ Equity
Equity, Attributable to Parent [Abstract]
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]
Insurance claims
Self Insurance Reserve, Current
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Interest rate cash flow hedge gain to be reclassified during next 12 months, net
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net
Instruments Used to Collateralize Insurance Obligations by Type [Axis]
Instruments Used to Collateralize Insurance Obligations by Type [Axis]
Instruments Used to Collateralize Insurance Obligations by Type [Axis]
Accumulated Other Comprehensive Loss, Net of Taxes
AOCI Attributable to Parent [Member]
Allowance for trade accounts receivable
Accounts Receivable, Allowance for Credit Loss, Current
Aviation Services
Facility Service Line, Aviation Services [Member]
Aviation Services [Member]
Schedule of Disaggregation of Revenues
Revenue from External Customers by Products and Services [Table Text Block]
Interest Rate Swap, Effective 2/9/2022
Interest Rate Swap, Effective 2/9/2022 [Member]
Interest Rate Swap, Effective 2/9/2022
Instruments used to collateralize insurance obligations
Instruments Used To Collateralize Insurance Obligations
Instruments Used To Collateralize Insurance Obligations
Long-term lease liabilities
Operating Lease, Liability, Noncurrent
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Fair Value as of Grant Date
Award Grant Date Fair Value
Entity Registrant Name
Entity Registrant Name
Other noncurrent assets
Increase (Decrease) in Other Noncurrent Assets
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Total assets acquired, excluding goodwill and intangibles
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Tangible Assets
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Tangible Assets
Schedule of Components of Debt
Schedule of Long-Term Debt Instruments [Table Text Block]
Capitalized commissions
Contract With Customer, Asset, Capitalized Commissions
Contract With Customer, Asset, Capitalized Commissions
Total adjustments
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity
Effect of dilutive securities (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Additional contract liabilities
Contract With Customer, Liability, Other, Increase (Decrease) For Additional Contract Liabilities
Contract With Customer, Liability, Other, Increase (Decrease) For Additional Contract Liabilities
Interest rate swap assets
Interest Rate Derivative Assets, at Fair Value
Document Quarterly Report
Document Quarterly Report
Credit Facility
Credit Facility [Member]
Credit Facility [Member]
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions
Energy Efficient Government Buildings Tax Credits, Amount
Energy Efficient Government Buildings Tax Credits, Amount
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Preferred equity investment
Equity Securities without Readily Determinable Fair Value, Amount
Goodwill amortization period for income tax purposes
Business Acquisition, Goodwill, Tax Deductible Amortization Period
Business Acquisition, Goodwill, Tax Deductible Amortization Period
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Segment Reconciling Items
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Swing Line Loan
Swing Line Loan [Member]
Swing Line Loan [Member]
Restatement Determination Date:
Restatement Determination Date [Axis]
Cash purchase price
Payments to Acquire Businesses, Gross
Changes in book cash overdrafts
Proceeds from (Repayments of) Bank Overdrafts
Stock Issued (taxes withheld) under employee stock purchase and share-based compensation plans, net
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture
Non-PEO NEO
Non-PEO NEO [Member]
Standby letters of credit
Letters of Credit Outstanding, Amount
Schedule of Interest Rate Swaps
Schedule of Interest Rate Derivatives [Table Text Block]
Billed trade receivables
Contract With Customer, Asset, Billed Trade Receivable, Current
Contract With Customer, Asset, Billed Trade Receivable, Current
Name
Trading Arrangement, Individual Name
Award Type [Domain]
Award Type [Domain]
Insurance claim reserves
Self Insurance Reserve
Interest rate swaps
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Compensation Amount
Outstanding Recovery Compensation Amount
Debt instrument, face amount
Debt Instrument, Face Amount
Restricted insurance deposits
Deposits [Member]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Percentage of capital stock of first-tier foreign subsidiaries held
Debt Instrument, Collateral, Percentage Of Capital Stock In First-Tier Foreign Subsidiaries
Debt Instrument, Collateral, Percentage Of Capital Stock In First-Tier Foreign Subsidiaries
Change in fair value of contingent consideration
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Letters Of Credit [Line Items]
Letters Of Credit [Line Items]
Letters Of Credit [Line Items]
Share-based compensation expense
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Accumulated other comprehensive loss, net of taxes
Accumulated Other Comprehensive Income (Loss), Net of Tax
2026
Long-Term Debt, Maturity, Year One
Tax related to amounts in accumulated other comprehensive income (loss)
Other Comprehensive Income (Loss) before Reclassifications, Tax
Total net leverage ratio
Debt Instrument, Covenant, Maximum Total Net Leverage Ratio
Debt Instrument, Covenant, Maximum Total Net Leverage Ratio
Segments [Domain]
Segments [Domain]
2030
Long-Term Debt, Maturity, Year Five
Borrowing capacity
Line of Credit Facility, Remaining Borrowing Capacity
Performance shares
Performance Shares [Member]
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Table]
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Table]
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table]
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Pledging Purpose [Domain]
Pledging Purpose [Domain]
Current portion of term loan
Loans Payable, Current
Minimum
Minimum [Member]
Management Reimbursement Revenue
Management Reimbursement Revenue [Member]
Management Reimbursement Revenue [Member]
Company Selected Measure Name
Company Selected Measure Name
Contract Types and Contract Balances
Revenue [Policy Text Block]
CREDIT FACILITY
Debt Disclosure [Text Block]
Preferred stock, $0.01 par value; 500,000 shares authorized; none issued
Preferred Stock, Value, Issued
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Trade accounts payable
Accounts Payable, Current
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Liabilities assumed
Business Combination, Recognized Liability Assumed, Liability
All Executive Categories
All Executive Categories [Member]
Stockholders' Equity Note [Abstract]
Common stock, $0.01 par value; 100,000,000 shares authorized; 61,725,062 and 62,196,665 shares issued and outstanding at July 31, 2025 and October 31, 2024, respectively
Common Stock, Value, Issued
Liability for Claims and Claims Adjustment Expense [Table]
Liability for Claims and Claims Adjustment Expense [Table]
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Diluted (in shares)
Weighted-average common and common equivalent shares outstanding — Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Insurance policy coverage, general and automobile liability losses
Insurance Policy Coverage, General Liability And Automobile Liability Losses
Represents commercial insurance umbrella policies that cover general liability and automobile liability losses above primary limits.
Commitments and contingencies
Commitments and Contingencies
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Energy Savings Contracts
Energy Savings Contracts [Member]
Energy Savings Contracts [Member]
Business Combination [Axis]
Business Combination [Axis]
Term Loan
Loans Payable [Member]
Entity Small Business
Entity Small Business
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Document Transition Report
Document Transition Report
Underlying Securities
Award Underlying Securities Amount
Equity Component [Domain]
Equity Component [Domain]
Document Period End Date
Document Period End Date
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Revolving line of credit
Long-Term Line of Credit, Noncurrent
INCOME TAXES
Income Tax Disclosure [Text Block]
Stock issued under share-based compensation plans
Dividend, Share-Based Payment Arrangement, Shares
RavenVolt
RavenVolt, Inc. [Member]
RavenVolt, Inc.
Facility Solutions
Facility Service Line [Member]
Facility Service Line
Cash paid to settle the contingent consideration liability
Contingent consideration payment
Payment for Contingent Consideration Liability, Financing Activities
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Credit facility
Debt Instrument, Fair Value Disclosure
Scenario [Axis]
Scenario [Axis]
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability for Claims and Claims Adjustment Expense [Line Items]
Document Type
Document Type
Fair Value, Inputs, Level 3
Fair Value, Inputs, Level 3 [Member]
NET INCOME PER COMMON SHARE
Earnings Per Share [Text Block]
Name
Outstanding Recovery, Individual Name
Loss Contingencies [Table]
Loss Contingencies [Table]
Product and Service [Axis]
Product and Service [Axis]
Trade accounts receivable, net of allowances of $25.1 and $22.8 at July 31, 2025 and October 31, 2024, respectively
Accounts and Other Receivables, Net, Current
Derivative Contract [Domain]
Derivative Contract [Domain]
Revenues
Total Revenues
Revenue from Contract with Customer, Excluding Assessed Tax
Litigation Status [Domain]
Litigation Status [Domain]
All Individuals
All Individuals [Member]
Expansion of existing share repurchase program
Stock Repurchase Program, Increase (Decrease) In Authorized Amount
Stock Repurchase Program, Increase (Decrease) In Authorized Amount
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Trade accounts receivable and costs incurred in excess of amounts billed
Increase (Decrease) in Receivables
Additions to property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Name
Forgone Recovery, Individual Name
Total current assets
Assets, Current
Statistical Measurement [Axis]
Statistical Measurement [Axis]
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]
Surety bonds and surety-backed letters of credit
Surety Bonds And Surety-Backed Letters Of Credit
Surety Bonds And Other Instruments
Amount of authorized repurchases under share repurchase program
Share Repurchase Program, Authorized, Amount
Loss contingency accrual
Loss Contingency Accrual
Weighted average interest rate
Debt, Weighted Average Interest Rate
Fixed Interest Rate
Derivative, Fixed Interest Rate
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Taxes withheld from issuance of share-based compensation awards, net
Payment, Tax Withholding, Share-Based Payment Arrangement
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Current liabilities
Liabilities, Current [Abstract]
Line of Credit Facility [Line Items]
Line of Credit Facility [Line Items]
Raul Valentin [Member]
Rene Jacobsen
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Fair Value, Inputs, Level 1
Fair Value, Inputs, Level 1 [Member]
Gain on sale of assets
Gain (Loss) on Disposition of Assets
Diluted (in USD per share)
Earnings Per Share, Diluted
Forecast
Forecast [Member]
Janitorial
Facility Service Line, Janitorial [Member]
Janitorial [Member]
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Title of 12(b) Security
Title of 12(b) Security
Amortization of previously capitalized contract costs
Capitalized Contract Cost, Amortization
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Net income per common share
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Long-term lease liabilities
Increase (Decrease) In Lease Liabilities, Noncurrent
Increase (Decrease) In Lease Liabilities, Noncurrent
Consolidation Items [Domain]
Consolidation Items [Domain]
Schedule of Anti-Dilutive Outstanding Stock Awards Issued Under Share-Based Compensation Plans
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Self insurance retention amount per-claim
Self Insured Retention, Amount Per Occurrence
Self Insured Retention, Amount Per Occurrence
Operating cash outflow amount of contingent consideration payment
Payment for Contingent Consideration Liability, Operating Activities
Effect of dilutive securities
Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract]
Education
Education [Member]
Education [Member]
Scenario, Material Acquisition
Scenario, Plan [Member]
Award Timing Disclosures [Line Items]
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Accrued compensation
Employee-related Liabilities, Current
Property, plant and equipment, net of accumulated depreciation of $368.9 and $351.3 at July 31, 2025 and October 31, 2024, respectively
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Interest Rate Swap, Effective 2/25/2022
Interest Rate Swap, Effective 2/25/2022 [Member]
Interest Rate Swap, Effective 2/25/2022
COMMON STOCK
Equity [Text Block]
Net income
Net income
Net income
Net Income (Loss) Attributable to Parent
Subsequent Event [Table]
Subsequent Event [Table]
Expiration Date
Trading Arrangement Expiration Date
Pending Litigation
Pending Litigation [Member]
Instruments Used to Collateralize Insurance Obligations, Type [Domain]
Instruments Used to Collateralize Insurance Obligations, Type [Domain]
Instruments Used to Collateralize Insurance Obligations, Type [Domain]
Other accrued liabilities
Other Accrued Liabilities, Current
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized
Repurchases of common stock, including excise taxes
Payments for Repurchase of Common Stock
Adoption Date
Trading Arrangement Adoption Date
Maximum contingent consideration payable in future years
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Entity Current Reporting Status
Entity Current Reporting Status
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Revenue from External Customers by Products and Services [Table]
Segment Reporting, Revenue from External Customer, Product and Service [Table]
Operating profit
Total operating profit
Operating Income (Loss)
Line of Credit
Line of Credit [Member]
Building & Energy Solutions
Engineering And Infrastructure Service Line, Building And Energy Solutions [Member]
Building & Energy Solutions [Member]
Retained earnings
Retained Earnings (Accumulated Deficit)
Noncurrent insurance claims
Self Insurance Reserve, Noncurrent
Schedule of Repurchase Activity
Class of Treasury Stock [Table Text Block]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
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]
Executive Category:
Executive Category [Axis]
Right-of-use assets
Increase (Decrease) In Operating Lease Right-Of-Use Asset
Increase (Decrease) In Operating Lease Right-Of-Use Asset
Borrowings from debt
Proceeds from Issuance of Long-Term Debt
Current Fiscal Year End Date
Current Fiscal Year End Date
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
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]
Statement [Table]
Statement [Table]
Effect of exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation
Deferred income taxes
Deferred Income Tax Expense (Benefit)
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]
Cash flows from financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Total noncurrent portion of term loan
Loans Payable, Noncurrent
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Quality Uptime
Quality Uptime Services, Inc [Member]
Quality Uptime Services, Inc
Operating profit
Segment Reporting Information, Profit (Loss) [Abstract]
Distributions from unconsolidated affiliates
Proceeds from Equity Method Investment, Distribution
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Insurance claims
Increase (Decrease) in Self Insurance Reserve
Anti-dilutive (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Weighted-average common and common equivalent shares outstanding
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Amendment Flag
Amendment Flag
2027
Long-Term Debt, Maturity, Year Two
Termination Date
Trading Arrangement Termination Date
Net cash used in financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Unamortized deferred financing costs
Debt Issuance Costs, Noncurrent, Net
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Measure:
Measure [Axis]
Long-term debt
Long-Term Debt, Excluding Current Maturities [Abstract]
Revenues attributable to acquiree
Business Combination, Acquiree's Revenue since Acquisition Date, Actual
Basic (in shares)
Weighted-average common and common equivalent shares outstanding — Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Amount of authorized repurchases remaining under share repurchase program
Share Repurchase Program, Remaining Authorized, Amount
Operating expenses
Cost of Product and Service Sold
Primary policy limit
Workers Compensation, General Liability, And Other Insurable Risks, Insurance Policy Limit
Represents the policy limit provided by the insurance program for workers' compensation, general liability, and other insurable risks.
Schedule of Basic and Diluted Net Income Per Common Share Calculations
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Insurance deposits
Restricted Cash and Cash Equivalent, Noncurrent
Subsequent Events [Abstract]
Subsequent Events [Abstract]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Impairment loss recorded on costs capitalized
Capitalized Contract Cost, Impairment Loss
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Entity Tax Identification Number
Entity Tax Identification Number
Scenario [Domain]
Scenario [Domain]
Schedule of Insurance Related Balances and Activity
Schedule Of Insurance Related Balances And Activity [Table Text Block]
Schedule Of Insurance Related Balances And Activity [Table Text Block]
Surety bonds and surety-backed letters of credit
Surety Bonds And Surety-Backed Letters Of Credit [Member]
Surety Bonds And Surety-Backed Letters Of Credit
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Common stock, par value (in USD per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares issued (in shares)
Common Stock, Shares, Issued
Number of industry groups
Number Of Industry Groups
Number Of Industry Groups
2029
Long-Term Debt, Maturity, Year Four
Parking and Transportation
Facility Service Line, Parking And Transportation [Member]
Facility Services, Parking and Transportation
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Axis]
Income tax (provision) / benefit
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Interest expense
Interest Expense, Nonoperating
Trading Arrangement:
Trading Arrangement [Axis]
Income taxes payable, net
Increase (Decrease) in Income Taxes Payable
Total Shareholder Return Amount
Total Shareholder Return Amount
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
SUBSEQUENT EVENTS
Subsequent Events [Text Block]
Insider Trading Arrangements [Line Items]
Corporate
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Security Exchange Name
Security Exchange Name
M&D
Manufacturing & Distribution
Manufacturing And Distribution [Member]
2025
Long-Term Debt, Maturity, Remainder of Fiscal Year
Unbilled trade receivables
Contract With Customer, Asset, Unbilled Trade Receivables, Current
Contract With Customer, Asset, Unbilled Trade Receivables, Current
Contract with Customer, Liabilities [Roll Forward]
Contract with Customer, Liabilities [Roll Forward]
Contract with Customer, Liabilities [Roll Forward]
Total liabilities
Liabilities
Interest Rate Swap, Effective 7/7/2022
Interest Rate Swap, Effective 7/7/2022 [Member]
Interest Rate Swap, Effective 7/7/2022
Line of credit facility, borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Number of customers retained
Business Combination, Contingent Consideration, Number Of Customers Retained
Business Combination, Contingent Consideration, Number Of Customers Retained
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Pledging Purpose [Axis]
Pledging Purpose [Axis]
Repurchase of common stock, including excise tax (in shares)
Total number of shares purchased (in shares)
Stock Repurchased During Period, Shares
Prepaid expenses
Prepaid Expense, Current
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Operations and Maintenance
Engineering And Infrastructure Service Line, Operations And Maintenance [Member]
Operations and Maintenance [Member]
Statement [Line Items]
Statement [Line Items]
Consolidation Items [Axis]
Consolidation Items [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Cash and cash equivalents
Cash and Cash Equivalent
Tax to be reclassified during the next 12 months
Interest Rate Cash Flow Hedge Gain (Loss) To Be Reclassified During Next 12 Months, Tax
Interest Rate Cash Flow Hedge Gain (Loss) To Be Reclassified During Next 12 Months, Tax
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Common Stock
Common Stock [Member]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Non-NEOs
Non-NEOs [Member]
Net increase in cash and cash equivalents
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation