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Customer Concentration and Revenue Information - Narratives (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 25, 2020
USD ($)
customer
Jul. 27, 2019
USD ($)
Jul. 25, 2020
USD ($)
customer
Rate
Jul. 27, 2019
USD ($)
Rate
Jan. 25, 2020
USD ($)
Concentration Risk          
Number of customers classified as highly concentrated | customer 5   5    
% of Total 100.00% 100.00% 100.00% 100.00%  
Amount $ 897,833   $ 897,833   $ 817,245
Revenue from Contract with Customer, Excluding Assessed Tax $ 823,921 $ 884,221 $ 1,638,244 $ 1,717,964  
Revenue Benchmark | Customer Concentration Risk          
Concentration Risk          
% of Total     10.00%    
Revenue Benchmark | Customer Concentration Risk | Five Unnamed Customers          
Concentration Risk          
% of Total | Rate     77.50% 79.40%