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Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($)
$ in Thousands
Oct. 03, 2020
Jul. 04, 2020
Dec. 31, 2019
Sep. 28, 2019
Jun. 29, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Losses related to foreign currency/equity method investment/operations $ (320,876) $ (337,743) $ (296,773) $ (309,865) $ (295,559) $ (304,646)
Canadian Operations [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Losses related to foreign currency/equity method investment/operations (129,400)          
Duferdofin Nucor S.r.l. [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Losses related to foreign currency/equity method investment/operations $ (191,500)