v3.26.1
Segments - Segments (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 04, 2026
Jul. 05, 2025
Jul. 04, 2026
Jul. 05, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]          
Net sales $ 10,397 $ 8,456 $ 19,893 $ 16,286  
Total sales 15,414 12,765 29,664 24,545  
Depreciation expense 320 303 641 606  
Amortization expense 63 63 126 128  
Cost of products sold 8,363 7,233 16,358 14,458  
Other segment items 148 156 292 212  
Segment earnings before income taxes and noncontrolling interests 2,055 1,292 3,504 1,840  
Earnings before income taxes and noncontrolling interests 1,625 899 2,721 1,184  
Capital expenditures 593 865 1,247 1,786  
Total assets 36,954   36,954   $ 35,104
Steel Mills [Member]          
Segment Reporting Information [Line Items]          
Total sales 7,974 6,613 15,445 12,594  
Other segment items 30 43 52 50  
Segment earnings before income taxes and noncontrolling interests 1,556 843 2,684 1,074  
Steel Products [Member]          
Segment Reporting Information [Line Items]          
Total sales 3,290 2,805 6,308 5,360  
Other segment items 95 85 177 123  
Segment earnings before income taxes and noncontrolling interests 353 392 629 680  
Raw Materials [Member]          
Segment Reporting Information [Line Items]          
Total sales 4,150 3,347 7,911 6,591  
Other segment items 23 28 63 39  
Segment earnings before income taxes and noncontrolling interests 146 57 191 86  
Operating Segments [Member]          
Segment Reporting Information [Line Items]          
Net sales 10,397 8,456 19,893 16,286  
Cost of products sold 13,211 11,317 25,868 22,493  
Operating Segments [Member] | Steel Mills [Member]          
Segment Reporting Information [Line Items]          
Net sales 6,481 5,253 12,517 10,160  
Depreciation expense 213 197 426 404  
Amortization expense 1 2 3 4  
Cost of products sold 6,388 5,727 12,709 11,470  
Capital expenditures 413 552 853 1,161  
Total assets 19,525   19,525   18,354
Operating Segments [Member] | Steel Products [Member]          
Segment Reporting Information [Line Items]          
Net sales 3,105 2,657 5,891 5,062  
Depreciation expense 55 46 109 86  
Amortization expense 54 54 108 110  
Cost of products sold 2,842 2,328 5,502 4,557  
Capital expenditures 100 156 230 310  
Total assets 12,031   12,031   11,770
Operating Segments [Member] | Raw Materials [Member]          
Segment Reporting Information [Line Items]          
Net sales 811 546 1,485 1,064  
Depreciation expense 46 54 94 105  
Amortization expense 8 7 15 14  
Cost of products sold 3,981 3,262 7,657 6,466  
Capital expenditures 42 118 90 236  
Total assets 4,332   4,332   4,013
Intercompany Eliminations [Member]          
Segment Reporting Information [Line Items]          
Net sales 5,017 4,309 9,771 8,259  
Intercompany Eliminations [Member] | Steel Mills [Member]          
Segment Reporting Information [Line Items]          
Net sales 1,493 1,360 2,928 2,434  
Intercompany Eliminations [Member] | Steel Products [Member]          
Segment Reporting Information [Line Items]          
Net sales 185 148 417 298  
Intercompany Eliminations [Member] | Raw Materials [Member]          
Segment Reporting Information [Line Items]          
Net sales 3,339 2,801 6,426 5,527  
Corporate and Eliminations Items [Member]          
Segment Reporting Information [Line Items]          
Net sales (5,017) (4,309) (9,771) (8,259)  
Earnings before income taxes and noncontrolling interests (430) (393) (783) (656)  
Corporate [Member]          
Segment Reporting Information [Line Items]          
Depreciation expense 6 6 12 11  
Capital expenditures 38 $ 39 74 $ 79  
Total assets $ 1,066   $ 1,066   $ 967