Document and Entity Information
Document and Entity Information Document | Apr. 21, 2021 | Oct. 21, 2020 |
Cover [Abstract] | ||
Document Type | 8-K | |
Document Period End Date | Jul. 21, 2021 | |
Entity Registrant Name | Valmont Industries, Inc. | |
Entity Central Index Key | 0000102729 | |
Amendment Flag | false | |
Entity Incorporation, State or Country Code | DE | |
Entity File Number | 1-31429 | |
Entity Tax Identification Number | 47-0351813 | |
Entity Address, Address Line One | 15000 Valmont Plaza | |
Entity Address, City or Town | Omaha | |
Entity Address, State or Province | NE | |
Entity Address, Postal Zip Code | 68154 | |
City Area Code | 402 | |
Local Phone Number | 963-1000 | |
Written Communications | false | |
Soliciting Material | false | |
Pre-commencement Tender Offer | false | |
Pre-commencement Issuer Tender Offer | false | |
Title of 12(b) Security | Common Stock, $1.00 par value | |
Trading Symbol | VMI | |
Security Exchange Name | NYSE | |
Entity Emerging Growth Company | false |