| Document and Entity Information | Apr. 21, 2021 |
| Document and Entity Information | |
| Document Type | 8-K |
| Document Period End Date | Apr. 21, 2021 |
| Entity Registrant Name | UFP INDUSTRIES, INC. |
| Entity File Number | 0-22684 |
| Entity Incorporation, State or Country Code | MI |
| Entity Tax Identification Number | 38-1465835 |
| Entity Address, Address Line One | 2801 East Beltline, NE |
| Entity Address, City or Town | Grand Rapids |
| Entity Address, State or Province | MI |
| Entity Address, Postal Zip Code | 49525 |
| City Area Code | 616 |
| Local Phone Number | 364-6161 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | UFPI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000912767 |
| Amendment Flag | false |
