v3.20.4
Business Combination - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 27, 2020
Jan. 31, 2021
Jan. 26, 2020
Jan. 27, 2019
Business Acquisition [Line Items]        
Payments to acquire businesses, net of cash acquired   $ 8,524 $ 4 $ 0
Mellanox Technologies, Ltd        
Business Acquisition [Line Items]        
Payments to acquire businesses, net of cash acquired $ 7,130      
Transaction costs   28    
IPR&D $ 630 $ 630    
Fair value adjustment, inventory     $ 161  
Mellanox Technologies, Ltd | Revenue        
Business Acquisition [Line Items]        
Concentration risk (as percent)   10.00%