Income Taxes - Additional Information (Details)	1 Months Ended		3 Months Ended	12 Months Ended
	Jun. 30, 2014	Jul. 31, 1999	Jan. 28, 2017 USD ($) branch	Jan. 28, 2017 USD ($) branch $ / shares	Jan. 30, 2016 USD ($) $ / shares	Jan. 31, 2015 USD ($) $ / shares	Jan. 27, 2007
Income Taxes [Line Items]
Deferred tax assets for net operating losses available to be used			$ 7,500,000	$ 7,500,000	$ 6,300,000
Valuation allowance			456,541,000	456,541,000	$ 424,914,000
Increase in valuation allowance				$ 31,600,000
Federal statutory tax rate				35.00%	35.00%	35.00%
Unrecognized tax benefit that would affect the effective income tax rate if recognized			23,400,000	$ 23,400,000
Unrecognized tax benefits offset by deferred tax assets				7,500,000	$ 6,300,000
Unrecognized tax benefit, interest and penalties accrued			21,600,000	21,600,000	26,400,000	$ 27,700,000
Interest and penalties related to unrecognized tax benefits included in consolidated statements of operation				2,700,000	$ 4,600,000	$ 3,800,000
Uncertain tax positions decrease from the lapse of the statutes of limitation in various jurisdictions during the next 12 months			9,500,000	9,500,000
Tax expense on restructuring			66,900,000
Foreign withholding taxes on undistributed earnings of subsidiaries not permanently reinvested			50,100,000
Cash, cash equivalents and short-term investments			1,700,000,000	1,700,000,000
Undistributed earnings of foreign subsidiaries			$ 620,000,000	$ 620,000,000
Marvell Israel
Income Taxes [Line Items]
Number of branches entitled to tax programs | branch			2	2
Foreign Subsidiaries
Income Taxes [Line Items]
Cash, cash equivalents and short-term investments			$ 970,000,000	$ 970,000,000
Increase (decrease) in tax expense in the event of undistributed earnings needed by parent company or no longer considered indefinitely reinvested outside of Bermuda				$ 190,000,000
Office of the Tax Commissioner, Bermuda
Income Taxes [Line Items]
Applicable statutory rate			0.00%	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
Tax holidays, tax savings amount				$ 900,000	$ 5,300,000	$ 100,000
Tax holidays, per share effect on earnings (less than) (in usd per share) | $ / shares				$ 0.01	$ 0.01	$ 0.01
Swiss Federal Department of Economy and the Vaud Cantonal Tax Administration Tax Holiday
Income Taxes [Line Items]
Expiration of tax exemption, period							10 years
Tax holidays, tax savings amount				$ 0	$ 3,700,000	$ 4,500,000
Tax holidays, per share effect on earnings (less than) (in usd per share) | $ / shares					$ 0.01	$ 0.01
Foreign
Income Taxes [Line Items]
Net operating loss carryforwards			$ 82,700,000	82,700,000
Tax expense associated with restructuring actions			16,800,000
Federal
Income Taxes [Line Items]
Net operating loss carryforwards			1,400,000	1,400,000
Federal | Research Tax Credit
Income Taxes [Line Items]
Tax credit carryforwards			268,500,000	268,500,000
Net operating loss carryforwards, amount attributable to excess tax benefits from stock options			63,000,000	63,000,000
State | California
Income Taxes [Line Items]
Net operating loss carryforwards			6,300,000	6,300,000
State | California | Research Tax Credit
Income Taxes [Line Items]
Tax credit carryforwards			279,400,000	279,400,000
Net operating loss carryforwards, amount attributable to excess tax benefits from stock options			60,000,000	60,000,000
State | Other State | Research and Investment Tax Credit
Income Taxes [Line Items]
Tax credit carryforwards			$ 24,300,000	$ 24,300,000