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BUSINESS ACQUISITION (Details) (USD $) In Millions, except Share data, unless otherwise specified		0 Months Ended	12 Months Ended		6 Months Ended
	Dec. 31, 2013	Jan. 24, 2012 Minera Andes	Dec. 31, 2013 Minera Andes	Dec. 31, 2013 Minera Andes Replacement options	Jun. 30, 2011 Minera Andes Robert R. McEwen	Dec. 31, 2013 Minera Andes Robert R. McEwen
BUSINESS ACQUISITION
Exchange ratio		0.45
Exchangeable Shares received by shareholders of acquiree		127,331,498			38,700,000
Shareholding of combined company by the then-existing McEwen Mining shareholders (as a percent)		52.00%
Shareholding of combined company by former Minera Andes shareholders (as a percent)		48.00%
Shareholding of combined company on a diluted basis by the then-existing McEwen Mining shareholders (as a percent)		53.00%
Shareholding of combined company on a diluted basis by former Minera Andes shareholders (as a percent)		47.00%
Percentage of shares of the company owned						25.00%
Outstanding Exchangeable Shares not exchanged	32,200,000					500,000
Ratio for exchange of exchangeable shares			1
Estimated fair value of the vested portion of the replacement options				$ 3.2

X

- Definition

Represents the exchange ratio to determine the number of shares of the acquirer that shareholders of acquiree entity will receive for each share held.

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- Definition

Represents the percentage of ownership interest held by the entity after the acquisition by the then-existing shareholders.

+ References

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- Definition

Represents the percentage of ownership interest held by the entity after the acquisition by former shareholders of the acquiree.

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- Definition

Represents the percentage of ownership interest on diluted basis held by the entity after the acquisition by the then-existing shareholders.

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- Definition

Represents the percentage of ownership interest on diluted basis held by the entity after the acquisition by former shareholders of the acquiree.

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- Definition

Represents the number of shares of common stock into which each unit of another convertible security can be converted.

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No definition available.

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)(4)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ 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)

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

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