SEGMENT AND GEOGRAPHIC INFORMATION - Financial Information by Reportable Segment (Details) - USD ($)	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Revenues
Revenues	$ 7,806,600,000	$ 6,228,600,000	$ 5,987,600,000
Operating profit
Operating profit	348,800,000	206,300,000	95,700,000
Income from unconsolidated affiliates	2,400,000	2,100,000	2,200,000
Interest expense	(41,100,000)	(28,600,000)	(44,600,000)
Income from continuing operations before income taxes	310,000,000.0	179,800,000	53,300,000
Depreciation and amortization
Depreciation and amortization	112,400,000	89,900,000	96,400,000
Goodwill, impairment loss	0	0
Goodwill and intangible asset impairment	0	0	172,800,000
Bucio | Settled Litigation
Depreciation and amortization
Litigation settlement reserve	900,000	142,900,000
Corporate
Operating profit
Operating profit	(284,500,000)	(374,600,000)	(146,900,000)
Depreciation and amortization
Depreciation and amortization	11,400,000	12,700,000	13,500,000
Segment Reconciling Items
Operating profit
Income from unconsolidated affiliates	(2,400,000)	(2,100,000)	(2,200,000)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions	(900,000)	(1,200,000)	(2,100,000)
Business & Industry
Revenues
Revenues	4,095,900,000	2,853,800,000	2,856,400,000
Business & Industry | Operating Segments
Operating profit
Operating profit	334,900,000	285,900,000	229,200,000
Depreciation and amortization
Depreciation and amortization	47,100,000	18,400,000	17,300,000
Manufacturing & Distribution
Revenues
Revenues	1,445,200,000	1,363,100,000	1,151,400,000
Manufacturing & Distribution | Operating Segments
Operating profit
Operating profit	161,800,000	155,500,000	108,000,000.0
Depreciation and amortization
Depreciation and amortization	13,400,000	13,400,000	14,100,000
Education
Revenues
Revenues	834,700,000	830,800,000	805,100,000
Depreciation and amortization
Goodwill, impairment loss			99,300,000
Education | Operating Segments
Operating profit
Operating profit	47,100,000	61,500,000	(39,900,000)
Depreciation and amortization
Depreciation and amortization	25,400,000	30,500,000	33,700,000
Aviation
Revenues
Revenues	804,000,000.0	651,100,000	670,700,000
Depreciation and amortization
Goodwill and intangible asset impairment			61,100,000
Aviation | Operating Segments
Operating profit
Operating profit	29,300,000	32,100,000	(60,100,000)
Depreciation and amortization
Depreciation and amortization	8,200,000	9,100,000	10,600,000
Technical Solutions
Revenues
Revenues	626,800,000	529,800,000	504,000,000.0
Depreciation and amortization
Goodwill and intangible asset impairment			12,400,000
Technical Solutions | Operating Segments
Operating profit
Operating profit	63,800,000	49,400,000	9,700,000
Depreciation and amortization
Depreciation and amortization	7,000,000.0	5,900,000	7,200,000
Government Services
Revenues
Revenues	0	0	0
Government Services | Operating Segments
Operating profit
Operating profit	$ (300,000)	$ (200,000)	$ (100,000)