XML 61 R42.htm IDEA: XBRL DOCUMENT
v3.25.0.1

INSURANCE - Schedule of Instruments Used to Collateralize Insurance Obligations (Details) - USD ($) $ in Millions | Jan. 31, 2025 | Oct. 31, 2024
--- | --- | ---
Letters Of Credit [Line Items] |  |
Instruments used to collateralize insurance obligations | $ 211.1 | $ 230.7
Standby letters of credit |  |
Letters Of Credit [Line Items] |  |
Instruments used to collateralize insurance obligations | 24.9 | 53.1
Surety bonds and surety-backed letters of credit |  |
Letters Of Credit [Line Items] |  |
Instruments used to collateralize insurance obligations | 183.9 | 175.3
Restricted insurance deposits |  |
Letters Of Credit [Line Items] |  |
Instruments used to collateralize insurance obligations | $ 2.3 | $ 2.3

X
- Definition Instruments Used To Collateralize Insurance Obligations + References No definition available. + Details
Name: | abm_InstrumentsUsedToCollateralizeInsuranceObligations
Namespace Prefix: | abm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Letters Of Credit [Line Items] + References No definition available. + Details
Name: | abm_LettersOfCreditLineItems
Namespace Prefix: | abm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | abm_InstrumentsUsedtoCollateralizeInsuranceObligationsbyTypeAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abm_InstrumentsUsedtoCollateralizeInsuranceObligationsbyTypeAxis=abm_SuretyBondsAndSuretyBackedLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abm_InstrumentsUsedtoCollateralizeInsuranceObligationsbyTypeAxis=us-gaap_DepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |