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Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($)
$ in Thousands
Apr. 04, 2020
Dec. 31, 2019
Mar. 30, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Losses related to foreign currency/equity method investment/operations $ (361,234) $ (296,773) $ (311,286) $ (304,646)
Canadian Operations [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Losses related to foreign currency/equity method investment/operations (169,600)      
Duferdofin Nucor S.r.l. [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Losses related to foreign currency/equity method investment/operations $ (191,600)