v3.26.1
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
6 Months Ended
Jul. 04, 2026
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested at beginning of year, Shares | shares 203
Granted, Shares | shares 216
Vested, Shares | shares (233)
Unvested at July 4, 2026, Shares | shares 186
Unvested at beginning of year, Grant Date Fair Value Per Share | $ / shares $ 154.81
Granted, Grant Date Fair Value Per Share | $ / shares 166.63
Vested, Grant Date Fair Value Per Share | $ / shares 165.94
Unvested at July 4, 2026, Grant Date Fair Value Per Share | $ / shares $ 154.59