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Employee Benefit Plans - Multiemployer Defined Benefit Pension Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019
Building Service 32BJ Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan Number | 001 |  |
Pension Protection Act Zone Status | Red | Red |
Pension Protection Act Zone Status, date | Jun. 30, 2020 | Jun. 30, 2019 |
Funding Improvement /Rehabilitation Plan Status | Implemented |  |
Surcharge Imposed | No |  |
Building Service 32BJ Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Oct. 15, 2023 |  |
Building Service 32BJ Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Dec. 31, 2023 |  |
S.E.I.U. National Industry Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan Number | 001 |  |
Pension Protection Act Zone Status | Red | Red |
Pension Protection Act Zone Status, date | Dec. 31, 2020 | Dec. 31, 2019 |
Funding Improvement /Rehabilitation Plan Status | Implemented |  |
Surcharge Imposed | Yes |  |
S.E.I.U. National Industry Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Jul. 31, 2022 |  |
S.E.I.U. National Industry Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Oct. 31, 2023 |  |
IUOE Stationary Engineers Local 39 Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
Pension Protection Act Zone Status, date | Dec. 31, 2020 | Dec. 31, 2019 |
IUOE Stationary Engineers Local 39 Pension Plan | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Aug. 31, 2023 |  |
IUOE Stationary Engineers Local 39 Pension Plan | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Oct. 31, 2024 |  |
Central Pension Fund of the IUOE & Participating Employers |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
Pension Protection Act Zone Status, date | Jan. 31, 2021 | Jan. 31, 2020 |
Expiration Dates of Collective Bargaining Agreements | Dec. 31, 2022 |  |
SEIU Local 1 & Participating Employers Pension Trust |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
Pension Protection Act Zone Status, date | Sep. 30, 2020 | Sep. 30, 2019 |
Expiration Dates of Collective Bargaining Agreements | Apr. 07, 2024 |  |
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
Pension Protection Act Zone Status, date | Dec. 31, 2020 | Dec. 31, 2019 |
Western Conference of Teamsters Pension Plan | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Dec. 31, 2021 |  |
Western Conference of Teamsters Pension Plan | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Nov. 30, 2022 |  |
Multiemployer Plans, Pension Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | $ 56.8 | $ 55.5 | $ 66.6
Multiemployer Plans, Pension Plans | Able |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | $ 4.6 |  |
Multiemployer Plans, Pension Plans | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Green Zone funded percent - Minimum | 80.00% | 80.00% |
Multiemployer Plans, Pension Plans | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Red Zone funded percent - Maximum | 65.00% | 65.00% |
Yellow Zone funded percent - Maximum | 80.00% | 80.00% |
Multiemployer Plans, Pension Plans | Building Service 32BJ Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer Identification Number | 131879376 |  |
Contributions by ABM, significant | $ 18.8 | $ 16.8 | 19.3
Multiemployer Plans, Pension Plans | S.E.I.U. National Industry Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer Identification Number | 526148540 |  |
Contributions by ABM, significant | $ 10.9 | 11.1 | 10.6
Multiemployer Plans, Pension Plans | IUOE Stationary Engineers Local 39 Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer Identification Number | 946118939 |  |
Funding Improvement /Rehabilitation Plan Status | NA |  |
Contributions by ABM, significant | $ 6.6 | 4.3 | 4.6
Surcharge Imposed | NA |  |
Multiemployer Plans, Pension Plans | Central Pension Fund of the IUOE & Participating Employers |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer Identification Number | 366052390 |  |
Funding Improvement /Rehabilitation Plan Status | NA |  |
Contributions by ABM, significant | $ 5.3 | 7.1 | 11.7
Surcharge Imposed | NA |  |
Multiemployer Plans, Pension Plans | SEIU Local 1 & Participating Employers Pension Trust |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer Identification Number | 366486542 |  |
Funding Improvement /Rehabilitation Plan Status | NA |  |
Contributions by ABM, significant | $ 3.9 | 4.3 | 5.1
Surcharge Imposed | NA |  |
Multiemployer Plans, Pension Plans | Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer Identification Number | 916145047 |  |
Funding Improvement /Rehabilitation Plan Status | NA |  |
Contributions by ABM, significant | $ 2.0 | 2.5 | 3.1
Surcharge Imposed | NA |  |
Multiemployer Plans, Pension Plans | All Other Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Contributions by ABM, insignificant | $ 9.3 | $ 9.5 | $ 12.2

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- Definition Amount of cost for employer contribution to multiemployer plan. Multiemployer plan includes, but is not limited to, pension plan determined to be individually significant and insignificant and other postretirement benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947 + Details
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