| Document and Entity Information | Apr. 20, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Apr. 20, 2021 |
| Entity Registrant Name | MARVELL TECHNOLOGY, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-00000000 |
| Entity Tax Identification Number | 85-3971597 |
| Entity Address, Address Line One | 1000 N. West Street |
| Entity Address, Address Line Two | Suite 1200 |
| Entity Address, City or Town | Wilmington |
| Entity Address, State or Province | DE |
| Entity Address, Postal Zip Code | 19801 |
| City Area Code | 302 |
| Local Phone Number | 295-4840 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Shares |
| Trading Symbol | MRVL |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001835632 |
