Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details) £ in Thousands, $ in Thousands, $ in Thousands	Oct. 25, 2020 USD ($) instrument	Oct. 25, 2020 CAD ($) instrument	Oct. 25, 2020 GBP (£) instrument	Jan. 26, 2020 USD ($) instrument	Jan. 26, 2020 CAD ($) instrument	Jan. 26, 2020 GBP (£) instrument
Derivative [Line Items]
Number of instruments | instrument	6	6	6	0	0	0
Sell USD/Buy CAD Forward Contract
Derivative [Line Items]
Number of instruments | instrument	3	3	3	0	0	0
Sell USD/Buy GBP Forward Contract
Derivative [Line Items]
Number of instruments | instrument	3	3	3	0	0	0
Sell Notional Value | Sell USD/Buy CAD Forward Contract
Derivative [Line Items]
Notional value | $	$ 4,287			$ 0
Sell Notional Value | Sell USD/Buy GBP Forward Contract
Derivative [Line Items]
Notional value | $	$ 2,255			$ 0
Buy Notional Value | Sell USD/Buy CAD Forward Contract
Derivative [Line Items]
Notional value | $		$ 6,000			$ 0
Buy Notional Value | Sell USD/Buy GBP Forward Contract
Derivative [Line Items]
Notional value | £			£ 1,800			£ 0