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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands, $ in Millions	3 Months Ended		9 Months Ended			53 Months Ended
	Jul. 31, 2021 USD ($)	Aug. 01, 2020 USD ($)	Jul. 31, 2021 USD ($) government_entity	Jul. 31, 2021 CAD ($) government_entity	Aug. 01, 2020 USD ($)	Jul. 31, 2021 USD ($)	Jul. 31, 2021 CAD ($)	Jul. 31, 2021 CAD ($)
Loss Contingencies [Line Items]
Total revenue | $	$ 988,141	$ 976,712	$ 2,579,198		$ 2,703,677
Canadian Grant
Loss Contingencies [Line Items]
Maximum amount of Canadian grant	46,200		$ 46,200			$ 46,200		$ 57.6
Number of Canadian government entities | government_entity			3	3
Total revenue			$ 6,300	$ 8.0		39,000	$ 48.6
Amounts receivable from grant	$ 4,700		$ 4,700			$ 4,700		$ 5.8

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