XML 71 R54.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Equity - Additional Information (Detail) - USD ($)
Jun. 30, 2018
Sep. 02, 2015
Nucor-Yamato Steel Company [Member]    
Stockholders' Equity [Line Items]    
Noncontrolling interest, ownership percentage by parent 51.00%  
Common Stock [Member]    
Stockholders' Equity [Line Items]    
Share repurchase program remaining amount $ 567,700,000  
Common Stock [Member] | Maximum [Member]    
Stockholders' Equity [Line Items]    
Share repurchase program authorized amount   $ 900,000,000