NATURE OF OPERATIONS (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 15, 2025	Dec. 14, 2025	Dec. 11, 2025	Dec. 10, 2025	Dec. 09, 2025	Oct. 25, 2024	Oct. 24, 2024	Jul. 12, 2024	Jul. 11, 2024	Oct. 10, 2023
Various mines in various locations
Nature of operations
Ownership interests in various mines (as a percent)	100.00%
McEwen Copper Inc.
Nature of operations
Subsidiary ownership interest (as a percent)	46.30%			46.30%	46.40%		46.40%	48.30%	48.30%	47.70%	47.70%
Minera Santa Cruz S.A.
Nature of operations
Subsidiary ownership interest (as a percent)	49.00%
Paragon Advanced Labs Inc.
Nature of operations
Subsidiary ownership interest (as a percent)	27.00%	27.00%	27.30%			27.32%