v3.26.1
SEGMENT AND RELATED INFORMATION: (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Financial information related to segments          
Number of reportable segments | segment     3    
Financial information relating to segments          
Net sales $ 4,289.0 $ 3,051.0 $ 8,540.4 $ 6,172.9  
Cost of sales (exclusive of depreciation, amortization and depletion) 1,389.5 1,211.7 2,888.3 2,530.9  
Selling, general and administrative 35.3 32.5 71.1 64.1  
Depreciation, amortization and depletion 226.0 206.2 451.7 430.0  
Exploration 14.9 13.7 25.7 25.4  
Operating income 2,623.2 1,587.0 5,103.6 3,122.5  
Interest, net (30.6) (40.8) (73.6) (84.1)  
Other income (expense) 6.8 (2.3) 13.6 (16.0)  
Income before income taxes 2,599.4 1,543.9 5,043.5 3,022.4  
Capital investment 422.8 235.7 864.7 553.5  
Property and mine development, net 10,662.0 9,915.0 10,662.0 9,915.0 $ 10,272.2
Total assets 24,127.7 19,554.7 24,127.7 19,554.7 $ 21,381.4
Operating segment          
Financial information relating to segments          
Net sales 4,364.3 3,112.3 8,707.7 6,283.1  
Cost of sales (exclusive of depreciation, amortization and depletion) 1,470.5 1,285.7 3,066.2 2,662.8  
Selling, general and administrative 32.6 29.9 65.5 58.5  
Depreciation, amortization and depletion 215.9 193.4 431.9 405.4  
Exploration 10.7 13.5 17.5 21.0  
Operating income 2,634.6 1,589.8 5,126.7 3,135.3  
Capital investment 421.3 234.4 861.0 550.6  
Property and mine development, net 10,187.7 9,470.3 10,187.7 9,470.3  
Total assets 18,092.7 15,577.4 18,092.7 15,577.4  
Corporate, Other & Eliminations          
Financial information relating to segments          
Net sales (75.4) (61.3) (167.3) (110.2)  
Cost of sales (exclusive of depreciation, amortization and depletion) (80.9) (74.0) (177.9) (132.0)  
Selling, general and administrative 2.8 2.6 5.7 5.6  
Depreciation, amortization and depletion 10.1 12.8 19.8 24.5  
Exploration 4.1 0.1 8.2 4.4  
Operating income (11.4) (2.8) (23.1) (12.8)  
Capital investment 1.5 1.2 3.7 2.9  
Property and mine development, net 474.3 444.6 474.3 444.6  
Total assets 6,035.1 3,977.3 6,035.1 3,977.3  
Reportable subsegments          
Financial information relating to segments          
Net sales 4,289.0 3,051.0 8,540.4 6,172.9  
Reportable subsegments | Operating segment          
Financial information relating to segments          
Net sales 4,289.0 3,051.0 8,540.4 6,172.9  
Intersegment sales          
Financial information relating to segments          
Net sales   0.0   0.0  
Intersegment sales | Operating segment          
Financial information relating to segments          
Net sales 75.4 61.3 167.3 110.2  
Intersegment sales | Corporate, Other & Eliminations          
Financial information relating to segments          
Net sales (75.4) (61.3) (167.3) (110.2)  
Mexican Open-pit | Operating segment          
Financial information relating to segments          
Net sales 2,511.9 1,754.8 4,955.5 3,504.2  
Cost of sales (exclusive of depreciation, amortization and depletion) 761.6 650.7 1,649.7 1,318.7  
Selling, general and administrative 23.4 17.2 40.3 34.1  
Depreciation, amortization and depletion 115.4 96.5 225.0 194.2  
Exploration 0.9 1.5 2.2 2.7  
Operating income 1,610.7 988.9 3,038.2 1,954.4  
Capital investment 137.4 148.6 307.9 283.2  
Property and mine development, net 5,138.0 4,899.5 5,138.0 4,899.5  
Total assets 9,287.6 9,072.7 9,287.6 9,072.7  
Mexican Open-pit | Reportable subsegments | Operating segment          
Financial information relating to segments          
Net sales 2,505.5 1,754.8 4,938.4 3,504.2  
Mexican Open-pit | Intersegment sales | Operating segment          
Financial information relating to segments          
Net sales 6.4   17.0    
Mexican IMMSA Unit | Operating segment          
Financial information relating to segments          
Net sales 267.9 179.3 586.5 334.7  
Cost of sales (exclusive of depreciation, amortization and depletion) 155.6 134.1 305.4 246.1  
Selling, general and administrative (1.3) 3.0 4.3 5.8  
Depreciation, amortization and depletion 20.9 20.8 41.4 40.6  
Exploration 4.7 3.6 6.6 6.1  
Operating income 88.0 17.8 228.8 36.2  
Capital investment 37.0 23.9 70.5 45.3  
Property and mine development, net 831.2 780.5 831.2 780.5  
Total assets 1,606.7 1,244.7 1,606.7 1,244.7  
Mexican IMMSA Unit | Reportable subsegments | Operating segment          
Financial information relating to segments          
Net sales 199.0 118.0 436.2 224.5  
Mexican IMMSA Unit | Intersegment sales | Operating segment          
Financial information relating to segments          
Net sales 69.0 61.3 150.3 110.2  
Peruvian Operations | Operating segment          
Financial information relating to segments          
Net sales 1,584.4 1,178.2 3,165.8 2,444.2  
Cost of sales (exclusive of depreciation, amortization and depletion) 553.3 500.9 1,111.1 1,098.0  
Selling, general and administrative 10.4 9.7 20.8 18.7  
Depreciation, amortization and depletion 79.7 76.1 165.6 170.7  
Exploration 5.1 8.4 8.6 12.2  
Operating income 935.9 583.1 1,859.6 1,144.6  
Capital investment 246.9 61.9 482.6 222.1  
Property and mine development, net 4,218.4 3,790.3 4,218.4 3,790.3  
Total assets 7,198.4 5,260.0 7,198.4 5,260.0  
Peruvian Operations | Reportable subsegments | Operating segment          
Financial information relating to segments          
Net sales $ 1,584.4 $ 1,178.2 $ 3,165.8 $ 2,444.2