SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Financial Information by Reportable Segment (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 31, 2023	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Revenues
Revenues		$ 8,096.4	$ 7,806.6	$ 6,228.6
Operating profit
Operating profit		409.5	348.8	206.3
Income from unconsolidated affiliates		3.9	2.4	2.1
Interest expense		(82.3)	(41.1)	(28.6)
Income before income taxes		331.1	310.0	179.8
Depreciation and amortization
Depreciation and amortization		120.7	112.4	89.9
Change in fair value of contingent consideration		45.6	0.0	0.0
Employee retention credit		24.0
RavenVolt | Fair Value Measurements, Recurring | Fair Value, Inputs, Level 3
Depreciation and amortization
Change in fair value of contingent consideration	$ 45.6	45.6
Bucio | Settled Litigation
Depreciation and amortization
Employee retention				142.9
Business & Industry
Revenues
Revenues		4,089.4	4,095.9	2,853.8
Manufacturing & Distribution
Revenues
Revenues		1,526.7	1,445.2	1,363.1
Education
Revenues
Revenues		880.4	834.7	830.8
Aviation
Revenues
Revenues		925.7	804.0	651.1
Technical Solutions
Revenues
Revenues		674.2	626.8	529.8
Technical Solutions | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Customer Contracts For Healthcare Technology Management
Depreciation and amortization
Gain on sale of government services business			7.6
Operating Segments | Business & Industry
Operating profit
Operating profit		315.6	334.9	285.9
Depreciation and amortization
Depreciation and amortization		44.9	47.1	18.4
Operating Segments | Manufacturing & Distribution
Operating profit
Operating profit		161.7	161.8	155.5
Depreciation and amortization
Depreciation and amortization		13.1	13.4	13.4
Operating Segments | Education
Operating profit
Operating profit		49.7	47.1	61.5
Depreciation and amortization
Depreciation and amortization		22.5	25.4	30.5
Operating Segments | Aviation
Operating profit
Operating profit		60.0	29.3	32.1
Depreciation and amortization
Depreciation and amortization		9.6	8.2	9.1
Operating Segments | Technical Solutions
Operating profit
Operating profit		53.2	63.8	49.4
Depreciation and amortization
Depreciation and amortization		17.5	7.0	5.9
Operating Segments | Government Services
Operating profit
Operating profit		0.0	(0.3)	(0.2)
Corporate
Operating profit
Operating profit		(226.6)	(284.5)	(374.6)
Depreciation and amortization
Depreciation and amortization		13.1	11.4	12.7
Segment Reconciling Items
Operating profit
Income from unconsolidated affiliates		(3.9)	(2.4)	(2.1)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions		$ (0.3)	$ (0.9)	$ (1.2)