v3.26.1
Stock-Based Compensation - Summary of Nucor's Restricted Stock Unit ("RSU") Activity (Detail)
shares in Thousands
3 Months Ended
Apr. 04, 2026
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested at beginning of year, Shares | shares 899
Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vested, Shares | shares (23)
Canceled, Shares | shares (7)
Unvested at April 4, 2026, Shares | shares 869
Unvested at beginning of year, Grant Date Fair Value Per Share | $ / shares $ 130.37
Vested, Grant Date Fair Value Per Share | $ / shares 123.55
Canceled, Grant Date Fair Value Per Share | $ / shares 131.47
Unvested at April 4, 2026, Grant Date Fair Value Per Share | $ / shares $ 130.54