| Document and Entity Information Document | Mar. 07, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 03, 2025 |
| Entity Registrant Name | SMITHFIELD FOODS, INC. |
| Entity Incorporation, State or Country Code | VA |
| Entity File Number | 001-15321 |
| Entity Tax Identification Number | 52-0845861 |
| Entity Address, Address Line One | 200 Commerce Street |
| Entity Address, City or Town | Smithfield |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23430 |
| City Area Code | 757 |
| Local Phone Number | 365-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, no par value |
| Trading Symbol | SFD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000091388 |
| Amendment Flag | false |
