SEGMENT AND RELATED INFORMATION: - Sales (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SALES VALUE PER SEGMENT:
Net sales	$ 13,420.0	$ 11,433.4	$ 9,895.8
Copper
SALES VALUE PER SEGMENT:
Net sales	10,033.8	8,753.7	7,591.1
Molybdenum
SALES VALUE PER SEGMENT:
Net sales	1,405.1	1,246.4	1,129.7
Zinc
SALES VALUE PER SEGMENT:
Net sales	529.9	434.9	301.4
Silver
SALES VALUE PER SEGMENT:
Net sales	973.9	588.0	417.6
Other
SALES VALUE PER SEGMENT:
Net sales	477.2	410.4	456.0
Operating segment
SALES VALUE PER SEGMENT:
Net sales	13,678.4	11,625.8	10,047.4
Operating segment \| Copper
SALES VALUE PER SEGMENT:
Net sales	10,135.1	8,835.1	7,660.4
Operating segment \| Molybdenum
SALES VALUE PER SEGMENT:
Net sales	1,405.1	1,246.4	1,129.7
Operating segment \| Zinc
SALES VALUE PER SEGMENT:
Net sales	563.9	443.6	300.9
Operating segment \| Silver
SALES VALUE PER SEGMENT:
Net sales	1,092.5	684.9	492.2
Operating segment \| Other
SALES VALUE PER SEGMENT:
Net sales	481.8	415.8	464.2
Corporate, Other & Eliminations
SALES VALUE PER SEGMENT:
Net sales	(258.5)	(192.4)	(151.6)
Corporate, Other & Eliminations \| Copper
SALES VALUE PER SEGMENT:
Net sales	(101.2)	(81.4)	(69.3)
Corporate, Other & Eliminations \| Zinc
SALES VALUE PER SEGMENT:
Net sales	(34.0)	(8.7)	0.5
Corporate, Other & Eliminations \| Silver
SALES VALUE PER SEGMENT:
Net sales	(118.6)	(96.9)	(74.6)
Corporate, Other & Eliminations \| Other
SALES VALUE PER SEGMENT:
Net sales	(4.6)	(5.4)	(8.2)
Mexican Open-pit \| Operating segment
SALES VALUE PER SEGMENT:
Net sales	7,623.0	6,317.0	5,562.3
Mexican Open-pit \| Operating segment \| Copper
SALES VALUE PER SEGMENT:
Net sales	5,810.6	4,981.1	4,442.2
Mexican Open-pit \| Operating segment \| Molybdenum
SALES VALUE PER SEGMENT:
Net sales	729.3	674.5	689.4
Mexican Open-pit \| Operating segment \| Zinc
SALES VALUE PER SEGMENT:
Net sales	283.2	137.3
Mexican Open-pit \| Operating segment \| Silver
SALES VALUE PER SEGMENT:
Net sales	556.9	342.6	233.7
Mexican Open-pit \| Operating segment \| Other
SALES VALUE PER SEGMENT:
Net sales	243.0	181.5	197.0
Mexican IMMSA Unit \| Operating segment
SALES VALUE PER SEGMENT:
Net sales	807.8	704.1	630.8
Mexican IMMSA Unit \| Operating segment \| Copper
SALES VALUE PER SEGMENT:
Net sales	142.2	127.7	89.1
Mexican IMMSA Unit \| Operating segment \| Zinc
SALES VALUE PER SEGMENT:
Net sales	280.7	306.2	300.9
Mexican IMMSA Unit \| Operating segment \| Silver
SALES VALUE PER SEGMENT:
Net sales	299.4	191.2	158.3
Mexican IMMSA Unit \| Operating segment \| Other
SALES VALUE PER SEGMENT:
Net sales	85.6	78.9	82.5
Peruvian Operations \| Operating segment
SALES VALUE PER SEGMENT:
Net sales	5,247.6	4,604.6	3,854.3
Peruvian Operations \| Operating segment \| Copper
SALES VALUE PER SEGMENT:
Net sales	4,182.3	3,726.2	3,129.1
Peruvian Operations \| Operating segment \| Molybdenum
SALES VALUE PER SEGMENT:
Net sales	675.8	571.9	440.3
Peruvian Operations \| Operating segment \| Silver
SALES VALUE PER SEGMENT:
Net sales	236.3	151.1	100.2
Peruvian Operations \| Operating segment \| Other
SALES VALUE PER SEGMENT:
Net sales	$ 153.3	$ 155.4	$ 184.7

SOUTHERN COPPER CORP/ 10-K