SEGMENT INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Revenues
Revenues	$ 1,936.2	$ 1,492.4
Operating profit
Operating profit	106.0	109.7
Income from unconsolidated affiliates	0.5	0.6
Interest expense	(6.2)	(8.5)
Income before income taxes	100.3	101.9
Technical Solutions | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Customer Contracts for Healthcare Technology Management
Operating profit
Gain on sale of assets	7.7
Operating Segments
Revenues
Revenues	1,936.2	1,492.4
Operating Segments | Business & Industry
Revenues
Revenues	1,029.5	690.1
Operating profit
Operating profit	83.3	72.7
Operating Segments | Manufacturing & Distribution
Revenues
Revenues	359.1	340.8
Operating profit
Operating profit	40.6	39.7
Operating Segments | Education
Revenues
Revenues	205.7	208.0
Operating profit
Operating profit	12.6	21.7
Operating Segments | Aviation
Revenues
Revenues	200.3	140.9
Operating profit
Operating profit	8.9	3.1
Operating Segments | Technical Solutions
Revenues
Revenues	141.8	112.6
Operating profit
Operating profit	16.9	6.0
Operating Segments | Government Services
Operating profit
Operating profit	(0.1)	(0.1)
Corporate
Operating profit
Operating profit	(55.8)	(32.6)
Segment Reconciling Items
Operating profit
Income from unconsolidated affiliates	(0.5)	(0.6)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions	$ 0.0	$ (0.2)