REVENUES (Tables)

12 Months Ended

Oct. 31, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenues

	Year ended October 31, 2025
(in millions)	B&I		M&D		Aviation		Education		Technical Solutions		Total
Major Service Line
Janitorial(1)	$	2,849.4	$	1,350.5	$	228.1	$	805.0	$	—	$	5,233.1
Aviation Services(2)	—		—		502.6		—		—		502.6
Parking and Transportation(3)	430.3		53.1		335.0		0.4		—		818.8
Facility Solutions	$	3,279.7	$	1,403.6	$	1,065.8	$	805.4	$	—	$	6,554.5
Operations and Maintenance(4)	841.0		213.5		52.9		116.5		—		1,224.0
Building & Energy Solutions(5)	5.3		1.5		—		—		960.6		967.4
Engineering and Infrastructure Solutions	$	846.3	$	215.0	$	52.9	$	116.5	$	960.6	$	2,191.4
Total	$	4,126.0	$	1,618.6	$	1,118.7	$	922.0	$	960.6	$	8,745.9

	Year ended October 31, 2024
(in millions)	B&I		M&D		Aviation		Education		Technical Solutions		Total
Major Service Line
Janitorial(1)	$	2,781.4	$	1,347.0	$	189.0	$	798.7	$	—	$	5,116.1
Aviation Services(2)	—		—		461.8		—		—		461.8
Parking and Transportation(3)	418.9		51.2		334.5		0.4		—		804.9
Facility Solutions	$	3,200.2	$	1,398.2	$	985.3	$	799.1	$	—	$	6,382.8
Operations and Maintenance(4)	858.9		156.1		47.3		105.0		—		1,167.2
Building & Energy Solutions(5)	—		—		—		—		809.3		809.3
Engineering and Infrastructure Solutions	$	858.9	$	156.1	$	47.3	$	105.0	$	809.3	$	1,976.5
Total	$	4,059.1	$	1,554.3	$	1,032.6	$	904.0	$	809.3	$	8,359.4

(1) Janitorial arrangements provide a wide range of essential cleaning services for commercial office buildings, airports and other transportation centers, educational institutions, government buildings, health facilities, industrial buildings, retail stores, and stadiums and arenas. These arrangements are often structured as monthly fixed-price, square-foot, cost-plus, and work order contracts.

(2) Aviation Services arrangements support airlines and airports with services such as passenger assistance, catering logistics, and airplane cabin maintenance. These arrangements are often structured as monthly fixed-price, cost-plus, transaction price, and hourly contracts.

(3) Parking and Transportation arrangements provide parking and transportation services for clients at various locations, including airports and other transportation centers, commercial office buildings, educational institutions, health facilities, hotels, and stadiums and arenas. These arrangements are structured as management reimbursement, leased location, and allowance contracts. Certain of these arrangements are considered service concession agreements and are accounted for under the guidance of Topic 853; accordingly, service concession expense related to these arrangements is recorded as a reduction of the related parking service revenues.

(4) Operations and Maintenance arrangements provide onsite mechanical engineering and technical services and solutions relating to a broad range of facilities and infrastructure systems that are designed to extend the useful life of facility fixed assets, improve equipment operating efficiencies, reduce energy consumption, lower overall operational costs for clients, and enhance the sustainability of client locations. These arrangements are generally structured as monthly fixed-price, cost-plus, and work order contracts.

(5) Building & Energy Solutions arrangements provide custom energy solutions, including microgrid systems installation, electrical, HVAC, lighting, electric vehicle charging station installation, uninterrupted power supply services, and other general maintenance and repair services for clients in the public and private sectors and are generally structured as Energy Savings, Fixed-Price Repair, and Refurbishment contracts. We also franchise certain operations under franchise agreements relating to our Linc Network and TEGG brands pursuant to franchise contracts.

Schedule of Contract Asset and Liability

The following tables present the balances in our contract assets and contract liabilities:

	As of October 31,
(in millions)	2025		2024
Contract assets
Billed trade receivables(1)	$	1,223.0	$	1,282.9
Unbilled trade receivables(1)	273.6		124.0
Costs incurred in excess of amounts billed	193.7		162.1
Capitalized commissions(2)	32.3		30.8

(1) Included in “Trade accounts receivable, net,” on the Consolidated Balance Sheets.

(2) Included in “Other current assets” and “Other noncurrent assets” on the Consolidated Balance Sheets. During the year ended October 31, 2025, we capitalized $20.1 million of new costs and amortized $18.6 million of previously capitalized costs. There was no impairment loss recorded on the costs capitalized.

(in millions)	Year Ended October 31, 2025
Contract liabilities(1)
Balance at beginning of year	$	118.2
Additional contract liabilities	415.0
Recognition of deferred revenue	(384.6)
Balance at end of year	$	148.6

(1) Included in other accrued liabilities and deferred revenue on the Consolidated Balance Sheets.