Accounting Standards (Details) - USD ($) $ in Thousands	Oct. 27, 2018	Jan. 28, 2018	Jan. 27, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	$ 849,769	$ 630,400	$ 318,684
Contract assets	147,320	57,800	$ 369,472
Balances Without Adoption of ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	477,418
Contract assets	519,671
ASU 2014-09 | Adjustments for ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	372,351	$ 311,700
Contract assets	$ (372,351)