SEGMENT AND GEOGRAPHIC INFORMATION (Tables)

12 Months Ended

Oct. 31, 2025

Segment Reporting [Abstract]

Schedule of Financial Information by Reportable Segment

Financial Information by Reportable Segment    

	Year Ended October 31, 2025
(in millions)	B&I		M&D		Aviation		Education		Technical Solutions		Total
Revenues	$	4,126.0	$	1,618.6	$	1,118.7	$	922.0	$	960.6	$	8,745.9
Significant segment expenses
Direct labor	2,290.1		1,058.6		657.2		605.7		306.2		4,917.9
Indirect costs	119.8		31.0		12.9		23.4		91.0		278.0
General and administrative	88.3		45.2		41.4		9.5		77.1		261.5
Selling	33.2		12.9		1.6		1.4		52.1		101.2
Other segment items(1)	1,277.6		319.4		340.5		214.3		347.9		2,499.5
Segment operating profit	$	316.9	$	151.4	$	65.2	$	67.7	$	86.5	$	687.6
Corporate											(370.5)
Adjustment for income from unconsolidated affiliates, included in Aviation and Technical Solutions											(4.6)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions											(0.8)
Total operating profit											$	311.7
Income from unconsolidated affiliates											4.6
Interest expense											(96.4)
Income before income taxes											$	219.9
Other significant segment items(3)
Materials and supplies	$	109.2	$	58.5	$	22.3	$	47.5	$	280.8
Salaries and wages (other than direct)	126.7		32.1		16.2		16.3		130.4
Consulting and professional services	11.8		5.3		46.0		4.0		9.2
Travel and entertainment (other than direct)	8.6		3.4		2.1		1.5		6.5
Legal	7.2		1.7		2.5		1.0		1.2

	Year Ended October 31, 2024
(in millions)	B&I		M&D		Aviation		Education		Technical Solutions		Total
Revenues	$	4,059.1	$	1,554.3	$	1,032.6	$	904.0	$	809.3	$	8,359.4
Significant segment expenses
Direct labor	2,239.9		996.5		596.7		598.4		262.2		4,693.7
Indirect costs	134.5		20.8		16.7		25.0		76.5		273.4
General and administrative	92.7		49.5		41.8		11.5		67.5		262.9
Selling	28.8		7.8		1.5		1.3		49.1		88.5
Other segment items(1)	1,256.2		313.5		316.8		212.5		284.6		2,383.6
Segment operating profit	$	307.0	$	166.3	$	59.1	$	55.3	$	69.4	$	657.2
Corporate(2)											(433.1)
Adjustment for income from unconsolidated affiliates, included in Aviation and Technical Solutions											(6.5)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions											(5.5)
Total operating profit											$	212.0
Income from unconsolidated affiliates											6.5
Interest expense											(85.0)
Income before income taxes											$	133.6
Other significant segment items(3)
Materials and supplies	$	119.9	$	73.5	$	21.8	$	49.1	$	242.0
Salaries and wages (other than direct)	131.3		25.7		18.5		19.0		107.9
Consulting and professional services	12.5		5.6		45.0		3.0		7.4
Travel and entertainment (other than direct)	9.6		2.1		1.8		1.2		5.3
Legal	9.6		1.5		2.1		0.8		0.9

	Year Ended October 31, 2023
(in millions)	B&I		M&D		Aviation		Education		Technical Solutions		Total
Revenues	$	4,089.4	$	1,526.7	$	925.7	$	880.5	$	674.2	$	8,096.4
Significant segment expenses
Direct labor	2,265.6		995.4		536.2		590.5		250.6		4,638.2
Indirect costs	135.0		19.0		15.8		19.8		61.3		250.9
General and administrative	91.0		47.3		38.9		11.0		51.4		239.6
Selling	32.5		5.7		0.7		2.9		49.7		91.4
Other segment items(1)	1,249.6		297.6		274.1		206.5		208.0		2,235.8
Segment operating profit	$	315.6	$	161.7	$	60.0	$	49.7	$	53.2	$	640.3
Corporate(2)											(226.7)
Adjustment for income from unconsolidated affiliates, included in Aviation and Technical Solutions											(3.9)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions											(0.3)
Total operating profit											$	409.5
Income from unconsolidated affiliates											3.9
Interest expense											(82.3)
Income before income taxes											$	331.1
Other significant segment items(3)
Materials and supplies	$	116.9	$	68.2	$	24.8	$	48.3	$	154.8
Salaries and wages (other than direct)	133.6		21.4		16.9		18.0		94.1
Consulting and professional services	14.4		4.7		29.1		3.3		4.1
Travel and entertainment (other than direct)	8.6		1.7		1.4		1.1		4.3
Legal	3.7		2.4		0.2		0.5		0.6

(1) Other segment items consist of payroll related expenses, materials and supplies, insurance costs, depreciation and amortization, consulting and professional services, and various other expense items.

(2) During the year ended October 31, 2024, reflects adjustments to the fair value of the contingent consideration payable related to the RavenVolt Acquisition of $95.7 million. During the year ended October 31, 2023, reflects adjustments to the fair value of the contingent consideration payable related to the RavenVolt Acquisition of $45.6 million and an employee retention credit totaling $24.0 million.

(3) Note these items are included in the segment expenses and operating profit shown above and are listed separately below segment operating profit as they are metrics that are separately provided to the CODMs on a regular basis.

Depreciation and Amortization

	Year Ended October 31,
	2025		2024		2023
Business & Industry	$	35.0	$	37.3	$	44.9
Manufacturing & Distribution	11.7		12.2		13.1
Aviation	14.1		12.6		9.6
Education	21.3		21.8		22.5
Technical Solutions	10.4		7.7		17.5
Corporate	13.1		15.0		13.1
	$	105.6	$	106.6	$	120.7

Schedule of Geographic Information Based on the Country in Which the Sale Originated

Geographic Information Based on the Country in Which the Sale Originated(1)

	Year Ended October 31,
(in millions)	2025		2024		2023
Revenues
United States	$	8,025.4	$	7,760.9	$	7,565.6
All other countries	720.5		598.4		530.8
	$	8,745.9	$	8,359.4	$	8,096.4

(1) Substantially all of our long-lived assets are related to U.S. operations.