BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Segment Reporting Information [Line Items]
Employee retention credit received	$ 22.4		$ 22.4
Revenues	2,028.2	$ 1,961.4	6,003.5	$ 5,795.5
Management Reimbursement Revenue
Segment Reporting Information [Line Items]
Revenues	$ 77.9	$ 72.8	$ 223.8	$ 204.1