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2409407 - Disclosure - Income Taxes - Changes in Unrecognized Tax Benefits (Details)
(http://www.marvell.com/role/IncomeTaxesChangesInUnrecognizedTaxBenefitsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001058057 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-31 - 2017-01-28
2015-02-01 - 2016-01-30
2014-02-02 - 2015-01-31
Income Tax Disclosure [Abstract]
 
 
 
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
 
 
 
Unrecognized tax benefits as of the beginning of the period
29,139,000  
45,197,000  
51,682,000  
Increases related to prior year tax positions
2,080,000  
304,000  
976,000  
Decreases related to prior year tax positions
0  
(4,334,000) 
(386,000) 
Increases related to current year tax positions
2,363,000  
4,237,000  
5,356,000  
Settlements
0  
(704,000) 
0  
Lapse in the statute of limitations
(6,576,000) 
(9,739,000) 
(10,691,000) 
Foreign exchange gain
(3,213,000) 
(5,822,000) 
(1,740,000) 
Gross amounts of unrecognized tax benefits as of the end of the period
23,793,000  
 
29,139,000  
 
45,197,000