| Document and Entity Information | Sep. 28, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001783317 |
| Document Type | 8-K |
| Document Period End Date | Sep. 28, 2021 |
| Entity Registrant Name | McAfee Corp. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39651 |
| Entity Tax Identification Number | 84-2467341 |
| Entity Address, Address Line One | 6220 America Center Drive |
| Entity Address, City or Town | San Jose |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95002 |
| City Area Code | (866) |
| Local Phone Number | 622-3911 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A Common Stock, $0.001 par value |
| Trading Symbol | MCFE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
