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Commitments and Contingencies (Details) $ in Thousands, $ in Millions	12 Months Ended				44 Months Ended
	Oct. 31, 2020 USD ($)	Oct. 31, 2020 CAD ($)	Nov. 02, 2019 USD ($)	Nov. 03, 2018 USD ($) government_entity	Oct. 31, 2020 USD ($)	Oct. 31, 2020 CAD ($)	Oct. 31, 2020 CAD ($)	Nov. 03, 2018 CAD ($)
Disaggregation of Revenue [Line Items]
Maximum amount of Canadian grant				$ 43,200				$ 57.6
Number of Canadian government entities | government_entity				3
Total revenue | $	$ 3,532,157		$ 3,572,131	$ 3,094,286
Amounts receivable from grant	3,900				$ 3,900		$ 5.1
Grant
Disaggregation of Revenue [Line Items]
Total revenue	$ 8,700	$ 11.7			$ 30,500	$ 40.6

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