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STOCK BASED COMPENSATION (Details 2) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Nevada Pacific Gold Ltd. CAD	Dec. 31, 2014 Minera Andes CAD	Dec. 31, 2014 McEwen Mining Inc. USD ($)	Dec. 31, 2014 $0.75 - $2.25 McEwen Mining Inc. USD ($)	Dec. 31, 2014 $2.26 - $2.75 McEwen Mining Inc. USD ($)	Dec. 31, 2014 $2.76 - $3.25 McEwen Mining Inc. USD ($)	Dec. 31, 2014 $3.26 - $6.50 McEwen Mining Inc. USD ($)	Dec. 31, 2014 $6.51 - $8.31 McEwen Mining Inc. USD ($)	Dec. 31, 2014 C$2.00 - C$2.50 Minera Andes CAD	Dec. 31, 2014 C$2.51-C$3.00 Minera Andes CAD	Dec. 31, 2014 C$4.25 - C$4.50 Nevada Pacific Gold Ltd. CAD	Dec. 31, 2014 C$4.25 - C$4.50 Minera Andes CAD	Dec. 31, 2014 C$4.51 - C$4.75 Nevada Pacific Gold Ltd. CAD	Dec. 31, 2014 C$4.51 - C$4.75 Minera Andes CAD	Dec. 31, 2014 C$4.76 - C$5.00 Nevada Pacific Gold Ltd. CAD	Dec. 31, 2014 C$5.01 - C$6.70 Nevada Pacific Gold Ltd. CAD
Stock options outstanding and exercisable
Range of Exercise Price, low end of range (in dollars per share)						$ 0.75us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember	$ 2.26us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember	$ 2.76us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeThreeMember	$ 3.26us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember	$ 6.51us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember	2.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember	2.51us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember	4.25us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember		4.51us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember		4.76us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember	5.01us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Range of Exercise Price, high end of range (in dollars per share)													4.50us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember	2.50us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember	4.75us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember	3.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember	5.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember	6.70us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Options Outstanding
Number Outstanding (in shares)			199,143us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember	301,650us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember	4,649,634us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember	1,515,334us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember	381,800us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember	1,706,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeThreeMember	516,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember	529,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember	256,650us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember	45,000us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember	40,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember		110,343us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember		2,300us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember	46,000us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Exercise Price (in dollars per share)			5.11us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember	2.30us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember	$ 3.35us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember	$ 2.18us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember	$ 2.50us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember	$ 2.90us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeThreeMember	$ 5.01us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember	$ 7.16us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember	2.27us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember	2.51us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember	4.30us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember		4.74us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember		4.91us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember	6.70us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Remaining Contractual Life			1 year 7 months 6 days	4 months 24 days	4 years 4 months 24 days	3 years 2 months 12 days	4 years 10 months 24 days	4 years 7 months 6 days	5 years 3 months 18 days	6 years	4 months 24 days	4 months 24 days	1 year 2 months 12 days		1 year 10 months 24 days		2 years 1 month 6 days	1 year 4 months 24 days
Options Exercisable
Number Exercisable (in shares)			199,143us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember	301,650us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember	1,954,465us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember	676,665us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember	331,800us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember		416,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember	529,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember	256,650us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember	45,000us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember	40,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember		110,343us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember		2,300us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember	46,000us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Exercise Price (in dollars per share)			5.11us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember	2.30us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember	$ 4.12us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember	$ 2.09us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember	$ 2.51us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember		$ 4.82us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember	$ 7.16us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember	2.27us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember	2.51us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember	4.30us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember		4.74us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember		4.91us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember	6.70us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Remaining Contractual Life			1 year 7 months 6 days	4 months 24 days	4 years 6 months	2 years 10 months 24 days	5 years		4 years 10 months 24 days	6 years	4 months 24 days	4 months 24 days	1 year 2 months 12 days		1 year 10 months 24 days		2 years 1 month 6 days	1 year 4 months 24 days
Additional disclosures
Number of shares required to be issued under the agreement	712,830mux_NumberOfSharesAgreedToBeIssuedUnderAgreement	90,300mux_NumberOfSharesAgreedToBeIssuedUnderAgreement
Number of shares remaining under agreement	319,640mux_NumberOfSharesRemainingUnderAgreement	90,300mux_NumberOfSharesRemainingUnderAgreement
Number of shares issued to settle part of account payables (in shares)	393,190us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Fair Value of remaining common shares outstanding payable	$ 0.4mux_FairValueOfRemainingCommonSharesOutstandingPayable	$ 0.2mux_FairValueOfRemainingCommonSharesOutstandingPayable

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

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