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Exploration in non-operating areas - Additional information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Exploration in non-operating areas
Disbursements Of Exploration In Non-Operating Areas	$ 8.5	$ 11.9	$ 36.3

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- Definition

It represents amount of disbursements of exploration in non-operating areas amount to vendors

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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