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Acquisitions - Additional Information (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 24, 2022
Feb. 01, 2022
Oct. 01, 2022
Oct. 02, 2021
Dec. 31, 2021
Business Acquisition [Line Items]          
Goodwill     $ 3,917,452   $ 2,827,344
Acquisitions net of cash acquired     3,549,764 $ 1,346,608  
C.H.I. Overhead Doors          
Business Acquisition [Line Items]          
Business acquisition, purchase price $ 3,000,000        
Goodwill 1,036,332        
Goodwill recognized for tax purposes $ 5,600        
CSI [Member]          
Business Acquisition [Line Items]          
Business acquisition, purchase price   $ 400,000      
Goodwill   $ 62,011      
Acquired controlling ownership percentage   51.00%      
Percentage of assets and liabilities   100.00%      
Business combination noncontrolling interest fair value percentage not acquired by Nucor   49.00%      
Implied percentage to determine fair value of noncontrolling interest   100.00%      
CSI [Member] | Vale S.A [Member]          
Business Acquisition [Line Items]          
Acquired controlling ownership percentage   50.00%      
CSI [Member] | JFE Steel Corporation [Member]          
Business Acquisition [Line Items]          
Acquired controlling ownership percentage   1.00%      
Other Acquisitions [Member]          
Business Acquisition [Line Items]          
Acquisitions net of cash acquired     $ 160,100