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Employee Benefit Plans - Multiemployer Defined Benefit Pension Plans (Details) - Multiemployer Plans, Pension Plans - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Multiemployer Plans [Line Items] |  |  |
Total Contributions | $ 55.5 | $ 66.6 | $ 65.3
Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Green Zone funded percent - Minimum | 80.00% | 80.00% |
Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Red Zone funded percent - Maximum | 65.00% | 65.00% |
Yellow Zone funded percent - Maximum | 80.00% | 80.00% |
Building Service 32BJ Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Multiemployer EIN | 131879376 |  |
Multiemployer Plan Number | 001 |  |
Pension Protection Act Zone Status(3) | Red | Red |
Pension Protection Act Zone Status, Date | Jun. 30, 2019 | Jun. 30, 2018 |
FIP/RP Status Pending/Implemented | Implemented |  |
Contributions by ABM, significant | $ 16.8 | $ 19.3 | 19.9
Surcharge Imposed(5) | 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] |  |  |
Multiemployer EIN | 526148540 |  |
Multiemployer Plan Number | 001 |  |
Pension Protection Act Zone Status(3) | Red | Red |
Pension Protection Act Zone Status, Date | Dec. 31, 2019 | Dec. 31, 2018 |
FIP/RP Status Pending/Implemented | Implemented |  |
Contributions by ABM, significant | $ 11.1 | $ 10.6 | 8.7
Surcharge Imposed(5) | Yes |  |
S.E.I.U. National Industry Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Jun. 30, 2021 |  |
S.E.I.U. National Industry Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Oct. 31, 2023 |  |
Central Pension Fund of the IUOE & Participating Employers |  |  |
Multiemployer Plans [Line Items] |  |  |
Multiemployer EIN | 366052390 |  |
Multiemployer Plan Number | 001 |  |
Pension Protection Act Zone Status(3) | Green | Green |
Pension Protection Act Zone Status, Date | Jan. 31, 2020 | Jan. 31, 2019 |
FIP/RP Status Pending/Implemented | NA |  |
Contributions by ABM, significant | $ 7.1 | $ 11.7 | 11.0
Surcharge Imposed(5) | NA |  |
Central Pension Fund of the IUOE & Participating Employers | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Apr. 30, 2021 |  |
Central Pension Fund of the IUOE & Participating Employers | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Dec. 31, 2022 |  |
SEIU Local 1 & Participating Employers Pension Trust |  |  |
Multiemployer Plans [Line Items] |  |  |
Multiemployer EIN | 366486542 |  |
Multiemployer Plan Number | 001 |  |
Pension Protection Act Zone Status(3) | Green | Green |
Pension Protection Act Zone Status, Date | Sep. 30, 2019 | Sep. 30, 2018 |
FIP/RP Status Pending/Implemented | NA |  |
Contributions by ABM, significant | $ 4.3 | $ 5.1 | 5.8
Surcharge Imposed(5) | NA |  |
Expiration Dates of Collective Bargaining Agreements | Apr. 04, 2021 |  |
IUOE Stationary Engineers Local 39 Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Multiemployer EIN | 946118939 |  |
Multiemployer Plan Number | 001 |  |
Pension Protection Act Zone Status(3) | Green | Green |
Pension Protection Act Zone Status, Date | Dec. 31, 2019 | Dec. 31, 2018 |
FIP/RP Status Pending/Implemented | NA |  |
Contributions by ABM, significant | $ 4.3 | $ 4.6 | 5.2
Surcharge Imposed(5) | NA |  |
IUOE Stationary Engineers Local 39 Pension Plan | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Nov. 15, 2020 |  |
IUOE Stationary Engineers Local 39 Pension Plan | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Oct. 31, 2024 |  |
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Multiemployer EIN | 916145047 |  |
Multiemployer Plan Number | 001 |  |
Pension Protection Act Zone Status(3) | Green | Green |
Pension Protection Act Zone Status, Date | Dec. 31, 2019 | Dec. 31, 2018 |
FIP/RP Status Pending/Implemented | NA |  |
Contributions by ABM, significant | $ 2.5 | $ 3.1 | 3.1
Surcharge Imposed(5) | NA |  |
Western Conference of Teamsters Pension Plan | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Jun. 30, 2021 |  |
Western Conference of Teamsters Pension Plan | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Dates of Collective Bargaining Agreements | Nov. 30, 2022 |  |
All Other Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Contributions by ABM, insignificant | $ 9.5 | $ 12.2 | $ 11.5

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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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