Commitments and Contingencies (Details) $ in Thousands, $ in Millions	3 Months Ended		6 Months Ended			38 Months Ended
	May 02, 2020 USD ($)	May 04, 2019 USD ($)	May 02, 2020 USD ($) government_entity	May 02, 2020 CAD ($) government_entity	May 04, 2019 USD ($)	May 02, 2020 USD ($)	May 02, 2020 CAD ($)	May 02, 2020 CAD ($)
Loss Contingencies [Line Items]
Maximum amount of Canadian grant	$ 40,900		$ 40,900			$ 40,900		$ 57.6
Number of Canadian government entities | government_entity			3	3
Total revenue | $	894,053	$ 865,011	$ 1,726,965		$ 1,643,538
Amounts receivable from grant	$ 5,200		5,200			5,200		$ 7.3
Grants
Loss Contingencies [Line Items]
Total revenue			$ 4,200	$ 5.6		$ 24,500	$ 34.5