v3.20.1
Income Taxes - Narrative (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Jun. 30, 2014
Jul. 31, 1999
Feb. 01, 2020
USD ($)
branch
Feb. 02, 2019
USD ($)
Feb. 03, 2018
USD ($)
Income Taxes [Line Items]          
Federal statutory tax rate     21.00%   33.70%
Tax benefit for intellectual property transfer     $ 763,000    
Deferred tax asset related to tax basis in intellectual property     659,000    
Income tax benefit related to tax basis in intellectual property     659,000    
Reversal of intangible assets, deferred tax liability     (104,000)    
Valuation allowance     676,780 $ 597,829  
Decrease in valuation allowance     79,000    
Unrecognized tax benefit that would affect the effective income tax rate if recognized     127,300    
Unrecognized tax benefits offset by deferred tax assets     146,600 135,600 $ 8,600
Unrecognized tax benefit, interest and penalties accrued     12,400 15,100 17,200
Interest and penalties related to unrecognized tax benefits included in consolidated statements of operation     1,400 $ 2,700 $ 2,300
Uncertain tax positions decrease from the lapse of the statutes of limitation in various jurisdictions during the next 12 months     15,200    
Cash, cash equivalents and short-term investments     648,000    
Unrecognized deferred tax liability on undistributed earnings of foreign subsidiaries     $ 176,000    
Marvell Israel          
Income Taxes [Line Items]          
Number of branches entitled to tax programs | branch     2    
Foreign Subsidiaries          
Income Taxes [Line Items]          
Cash, cash equivalents and short-term investments     $ 421,000    
Office of the Tax Commissioner, Bermuda          
Income Taxes [Line Items]          
Applicable statutory rate     0.00% 0.00% 0.00%
Economic Development Board of Singapore Pioneer Status          
Income Taxes [Line Items]          
Expiration of tax exemption, period 15 years 10 years      
Federal          
Income Taxes [Line Items]          
Net operating loss carryforwards     $ 932,100    
Operating loss carryforwards subject to annual limitation     718,500    
Tax credit carryforwards subject to annual limitation     120,400    
Federal | Research Tax Credit          
Income Taxes [Line Items]          
Tax credit carryforwards     310,700    
State | California          
Income Taxes [Line Items]          
Net operating loss carryforwards     597,400    
State | California | Research Tax Credit          
Income Taxes [Line Items]          
Tax credit carryforwards     440,500    
State | Other State | Research and Investment Tax Credit          
Income Taxes [Line Items]          
Tax credit carryforwards     26,000    
Foreign          
Income Taxes [Line Items]          
Net operating loss carryforwards     $ 514,800