SEGMENT INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Revenues
Revenues	$ 2,028.2	$ 1,961.4	$ 6,003.5	$ 5,795.5
Operating profit
Operating profit	138.9	88.7	303.1	269.7
Income from unconsolidated affiliates	1.2	0.8	3.0	1.8
Interest expense	(20.9)	(11.1)	(61.8)	(25.2)
Income before income taxes	119.3	78.3	244.2	246.3
Employee retention credit	22.4		22.4
Business & Industry
Revenues
Revenues	1,021.4	1,033.8	3,056.4	3,067.0
Manufacturing & Distribution
Revenues
Revenues	381.9	358.1	1,135.5	1,074.1
Education
Revenues
Revenues	219.1	207.5	650.7	617.6
Aviation
Revenues
Revenues	238.0	203.5	677.5	589.7
Technical Solutions
Revenues
Revenues	167.9	158.4	483.4	447.2
Technical Solutions | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Customer Contracts for Healthcare Technology Management
Operating profit
Gain on sale of assets			7.6	7.6
Operating Segments | Business & Industry
Revenues
Revenues	1,021.4	1,033.8	3,056.4	3,067.0
Operating profit
Operating profit	78.9	82.4	231.1	242.4
Operating Segments | Manufacturing & Distribution
Revenues
Revenues	381.9	358.1	1,135.5	1,074.1
Operating profit
Operating profit	38.1	38.0	119.7	120.6
Operating Segments | Education
Revenues
Revenues	219.1	207.5	650.7	617.6
Operating profit
Operating profit	15.9	14.5	39.5	38.8
Operating Segments | Aviation
Revenues
Revenues	238.0	203.5	677.5	589.7
Operating profit
Operating profit	11.7	9.5	43.6	28.0
Operating Segments | Technical Solutions
Revenues
Revenues	167.9	158.4	483.4	447.2
Operating profit
Operating profit	11.4	15.4	28.8	42.8
Operating Segments | Government Services
Operating profit
Operating profit	0.0	0.1	0.0	(0.3)
Corporate
Operating profit
Operating profit	(15.9)	(70.3)	(156.7)	(200.6)
Segment Reconciling Items
Operating profit
Income from unconsolidated affiliates	(1.2)	(0.8)	(3.0)	(1.8)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions	$ 0.0	$ (0.1)	$ (0.1)	$ (0.3)