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Shareholders' equity - Outstanding (Detail)	12 Months Ended
	Dec. 31, 2017 EquityInstruments $ / shares shares	Dec. 31, 2016 EquityInstruments shares	Dec. 31, 2015 EquityInstruments
Stock-based payments
Common share outstanding	185,930,331	178,482,139
Stock options | EquityInstruments	955,603	1,304,328	1,592,480
Restricted Share Units | EquityInstruments	119,796	138,614
Warrants		6,510,280
Special Warrant		2,000,000
Total	187,005,730	188,435,361
Taseko Mines Limited
Stock-based payments
The number of warrants granted	1
Number of common share exchanged for each purchase share warrant	2,000,000
Common share price per share for each purchase share warrant. | $ / shares	$ 75.00

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- Definition

Common share price per share for each purchase share warrant.

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- Definition

The maximum number of shares outstanding if all equity awards were exercised.

+ References

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- Definition

The maximum number of shares outstanding if special warrants issued were exercised.

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- Definition

The maximum number of shares outstanding if warrants issued were exercised.

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Number of common share exchanged for each purchase share warrant.

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The number of warrants granted.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

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The number of share options outstanding in a share-based payment arrangement.

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- Definition

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

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