v3.19.3.a.u2
Segment Information - Revenue and Accounts Receivable by Major Customer (Details) - Significant Customer - Customer Concentration Risk
12 Months Ended
Jan. 26, 2020
Jan. 27, 2019
Revenue    
Revenue, Major Customer [Line Items]    
Concentration risk (as percent) 11.00%  
Accounts Receivable    
Revenue, Major Customer [Line Items]    
Concentration risk (as percent) 21.00% 19.00%