v3.26.1
Stock-Based Compensation - Summary of Nucor's Restricted Stock Unit ("RSU") Activity (Detail) - Restricted Stock Units [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 899
Granted, Shares | shares 265
Vested, Shares | shares (519)
Canceled, Shares | shares (11)
Unvested at July 4, 2026, Shares | shares 634
Unvested at beginning of year, Grant Date Fair Value Per Share | $ / shares $ 130.37
Granted, Grant Date Fair Value Per Share | $ / shares 251.49
Vested, Grant Date Fair Value Per Share | $ / shares 152.31
Canceled, Grant Date Fair Value Per Share | $ / shares 144.29
Unvested at July 4, 2026, Grant Date Fair Value Per Share | $ / shares $ 162.73