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INSURANCE - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020
Schedule of Other Liabilities [Line Items] |  |  |
Insurance policy coverage, general and automobile liability losses | $ 200.0 |  |
Insurance policy coverage, property damage | 75.0 |  |
Change in case reserves plus IBNR Claims — prior years | 36.8 | $ 36.0 | $ 30.2
Minimum |  |  |
Schedule of Other Liabilities [Line Items] |  |  |
Self insurance retention amount per-claim | 1.0 |  |
Primary policy limit | 1.0 |  |
Maximum |  |  |
Schedule of Other Liabilities [Line Items] |  |  |
Self insurance retention amount per-claim | 1.5 |  |
Primary policy limit | 5.0 |  |
Self insurance retention amount per-claim, medical plan | $ 0.5 |  |

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- Definition Represents commercial insurance umbrella policies that cover general liability and automobile liability losses above primary limits. + References No definition available. + Details
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Namespace Prefix: | abm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the policy limit provided by the insurance program for property damage risks. + References No definition available. + Details
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- Definition Schedule of Other Liabilities [Line Items] + References No definition available. + Details
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- Definition Self Insured Retention Amount Per Occurrence + References No definition available. + Details
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- Definition Self Insured Retention Amount Per Participant Per Year For Certain Employee Medical And Dental Programs + References No definition available. + Details
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- Definition Represents the policy limit provided by the insurance program for workers' compensation, general liability, and other insurable risks. + References No definition available. + Details
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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Details
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- Details
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