EMPLOYEE BENEFIT PLANS (Tables)

12 Months Ended

Oct. 31, 2023

Retirement Benefits [Abstract]

Schedule of Information for the Plans

Information for the Plans

	As of October 31,
(in millions)	2023		2022
Net obligations	$	6.1	$	6.0
Projected benefit obligations(1)	11.9		12.2
Fair value of assets	5.8		6.2

(1) At October 31, 2023 and 2022, total projected benefit obligations related to unfunded and underfunded plans were $11.9 million and $12.2 million, respectively.

Schedule of Multiemployer Defined Benefit Pension Plans

Key Information for Individually Significant Multiemployer Defined Benefit Pension Plans(1)

($ in millions)

Pension Protection Act Zone Status(3)

FIP/RP Status(4)

Contributions by ABM

Surcharge Imposed(5)

Expiration Dates of Collective Bargaining Agreements

Pension Fund

EIN/PN(2)

2023

2022

Pending/ Implemented

2023

2022

2021

Building Service 32BJ Pension Fund

13-1879376 / 001

Yellow 6/30/2022

Yellow 6/30/2021

Implemented

$

21.4

$

22.7

$

18.8

No

12/15/2023 - 12/31/2027

S.E.I.U National Industry Pension Fund

52-6148540 / 001

Red 12/31/2022

Red 12/31/2021

Implemented

19.3

17.6

10.9

Yes

6/30/2024 - 7/31/2025

Central Pension Fund of the IUOE & Participating Employers

36-6052390 / 001

Green 1/31/2023

Green 1/31/2022

N/A*

13.0

12.8

5.3

N/A*

12/23/2023 - 6/30/2026

SEIU Local 1 & Participating Employers Pension Trust

36-6486542 / 001

Green 9/30/2022

Green 9/30/2021

N/A*

4.8

5.8

3.9

N/A*

11/30/2023 - 5/31/2026

IUOE Stationary Engineers Local 39 Pension Plan

94-6118939 / 001

Green 12/31/2022

Green 12/31/2021

N/A*

4.6

4.4

6.6

N/A*

11/30/2026 - 12/31/2029

Western Conference of Teamsters Pension Plan

91-6145047 / 001

Green 12/31/2022

Green 12/31/2021

N/A*

2.4

2.2

2.0

N/A*

11/30/2026 - 12/31/2029

All Other Plans:

8.0

8.2

9.3

Total Contributions

$

73.6

$

73.8

$

56.8

*Not applicable

(1) To determine individually significant plans, we evaluated several factors, including our total contributions to the plan, our significance to the plan in terms of participating employees and contributions, and the funded status of the plan.

(2) The “EIN/PN” column provides the Employer Identification Number and the three-digit plan number assigned to the plan by the IRS.

(3) The Pension Protection Act Zone Status columns provide the two most recently available Pension Protection Act zone statuses from each plan. The zone status is based on information provided to us and other participating employers and is certified by each plan’s actuary. Among other factors, plans in the red zone are generally less than 65% funded, plans in the yellow zone are less than 80% funded, and plans in the green zone are at least 80% funded.

(4) Indicates whether a Financial Improvement Plan (“FIP”) for yellow zone plans or a Rehabilitation Plan (“RP”) for red zone plans is pending or implemented.

(5) Indicates whether our contribution in 2023 included an amount as imposed by a plan in the red zone in addition to the contribution rate specified in the applicable collective bargaining agreement.

Multiemployer Pension Plans for which ABM Is a Significant Contributor

Pension Fund	Contributions to the plan exceeded more than 5% of total contributions per most currently available Forms 5500 (as of the plan’s year end)
Apartment Employees Trust Fund*	12/31/2022, 12/31/2021, and 12/31/2020
Arizona Sheet Metal Pension Trust Fund*	6/30/2022, 6/30/2021, and 6/30/2020
Building Service 32BJ Pension Fund	6/30/2022, 6/30/2021, and 6/30/2020
Building Service Pension Plan*	4/30/2022, 4/30/2021, and 4/30/2020
Central Pension Fund of the IUOE & Participating Employers	1/31/2023
Contract Cleaners Service Employees' Pension Plan*	12/31/2022, 12/31/2021, and 12/31/2020
IUOE Stationary Engineers Local 39 Pension Plan	12/31/2022, 12/31/2021, and 12/30/2020
Local 210's Pension Plan*	12/31/2022, 12/31/2021, and 12/31/2020
Local 670 Pension Plan*	12/31/2022
Massachusetts Service Employees Pension Plan*	12/31/2022, 12/31/2021, and 12/31/2020
S.E.I.U National Industry Pension Fund	12/31/2022, 12/31/2021, and 12/31/2020
SEIU Local 1 & Participating Employers Pension Trust	9/30/2022, 9/30/2021, and 9/30/2020
Service Employees International Union Local 1 Cleveland Pension Plan*	12/31/2022, 12/31/2021, and 12/31/2020
Service Employees International Union Local 32BJ, District 36 Building Operators Pension Trust Fund*	12/31/2022, 12/31/2021, and 12/31/2020
Teamsters Local 617 Pension Fund*	2/28/2022, 2/28/2021, and 2/29/2020
U.S.W.U. Local 74 Welfare Fund*	12/31/2022, 12/31/2021, and 12/31/2020

* These plans are not separately listed in our multiemployer table as they represent an insignificant portion of our total multiemployer pension plan contributions.