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Stock-Based Compensation - Summary of Nucor's Restricted Stock Activity under AIP and LTIP (Detail) - Restricted Stock Units and Restricted Stock Awards [Member]
shares in Thousands
3 Months Ended
Mar. 30, 2024
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested at beginning of year, Shares | shares 210
Granted, Shares | shares 421
Vested, Shares | shares (350)
Unvested at March 30, 2024, Shares | shares 281
Unvested at beginning of year, Grant Date Fair Value Per Share | $ / shares $ 145.55
Granted, Grant Date Fair Value Per Share | $ / shares 187.54
Vested, Grant Date Fair Value Per Share | $ / shares 176.74
Unvested at March 30, 2024, Grant Date Fair Value Per Share | $ / shares $ 169.57