- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum amount the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mrvl_DefinedContributionPlanTranchesAxis=mrvl_DefinedContributionPlanTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mrvl_DefinedContributionPlanTranchesAxis=mrvl_DefinedContributionPlanTrancheTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Employee Benefit Plans - Employee 401(k) Plans (Details) - USD ($)	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 30, 2021	Dec. 31, 2020	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
United States
Defined Contribution Plan Disclosure [Line Items]
Maximum contribution per employee	$ 5,000	$ 4,000
Matching contributions to employees			$ 11,100,000	$ 11,000,000.0	$ 8,600,000
United States \| Defined Contribution Plan, Tranche One
Defined Contribution Plan Disclosure [Line Items]
Employee pre-tax contributions to 401(k) (as a percent)			4.00%
Employer match contributions percentage			100.00%
United States \| Defined Contribution Plan, Tranche Two
Defined Contribution Plan Disclosure [Line Items]
Employee pre-tax contributions to 401(k) (as a percent)			2.00%
Employer match contributions percentage			50.00%
United States \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Employee pre-tax contributions to 401(k) (as a percent)			1.00%
United States \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Employee pre-tax contributions to 401(k) (as a percent)			75.00%
Non-U.S. Defined Contribution Plan
Defined Contribution Plan Disclosure [Line Items]
Matching contributions to employees			$ 11,300,000	$ 9,600,000	$ 16,800,000