Fair Value Measurements - Additional Information (Detail)	Jul. 30, 2016
Fair Value, Measurement Inputs, Disclosure [Line Items]
Percentage of total amount of assets measured using Level 3 valuation methodologies to total assets	0.20%

Ratio of the total amount of assets measured using Level 3 valuation methodologies to the total assets.

No definition available.

Name:	mrvl_RatioOfLevelThreeAssetsToTotalAssets
Namespace Prefix:	mrvl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant