v3.8.0.1
Document and Entity Information - shares
shares in Millions
3 Months Ended
May 05, 2018
May 29, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date May 05, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol MRVL  
Entity Registrant Name MARVELL TECHNOLOGY GROUP LTD  
Entity Central Index Key 0001058057  
Current Fiscal Year End Date --02-02  
Entity File Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   499.9