v3.20.1
Goodwill and Acquired Intangible Assets, Net - Net Carrying Amounts and Weighted Average Amortization Period (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 01, 2020
Feb. 02, 2019
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts $ 3,177,000  
Accumulated Amortization and Write-Offs (551,400)  
Net Carrying Amounts $ 2,625,600  
Weighted average remaining amortization period 6 years 5 months 4 days  
IPR&D $ 139,000  
Gross Carrying Amounts, Total acquired intangible assets 3,316,000  
Net Carrying Amounts 2,764,600 $ 2,560,682
Cavium    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts   2,231,000
Accumulated Amortization and Write-Offs   (183,318)
Net Carrying Amounts   $ 2,047,682
Weighted average remaining amortization period   7 years 4 months 2 days
IPR&D   $ 513,000
Gross Carrying Amounts, Total acquired intangible assets   2,744,000
Net Carrying Amounts   2,560,682
Developed technologies    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts 2,511,000  
Accumulated Amortization and Write-Offs (413,735)  
Net Carrying Amounts $ 2,097,265  
Weighted average remaining amortization period 6 years 4 months 28 days  
Developed technologies | Cavium    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts   1,743,000
Accumulated Amortization and Write-Offs   (134,167)
Net Carrying Amounts   $ 1,608,833
Weighted average remaining amortization period   7 years 1 month 6 days
Customer contracts and related relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts $ 643,000  
Accumulated Amortization and Write-Offs (128,939)  
Net Carrying Amounts $ 514,061  
Weighted average remaining amortization period 6 years 7 months 9 days  
Customer contracts and related relationships | Cavium    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts   $ 465,000
Accumulated Amortization and Write-Offs   (45,939)
Net Carrying Amounts   $ 419,061
Weighted average remaining amortization period   8 years 5 months 1 day
Trade names    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts $ 23,000  
Accumulated Amortization and Write-Offs (8,726)  
Net Carrying Amounts $ 14,274  
Weighted average remaining amortization period 2 years 11 months 15 days  
Trade names | Cavium    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts   $ 23,000
Accumulated Amortization and Write-Offs   (3,212)
Net Carrying Amounts   $ 19,788
Weighted average remaining amortization period   3 years 10 months 6 days