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Exploration Expense (Tables)

12 Months Ended

Dec. 31, 2021

Exploration Expenses Disclosure [Abstract]

Summary of exploration expenses

			United States Dollar
Figures in millions unless otherwise stated			2021			2020			2019
Australia			(21.3)			(16.9)			(30.0)
Ghana			(9.6)			—			—
Peru			(1.6)			(1.4)			(4.4)
Chile			(27.2)			(30.1)			(49.1)
Other			(0.9)			(1.3)			(0.9)
Total exploration expense			(60.6)			(49.7)			(84.4)

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