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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	1 Months Ended
	Oct. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 02, 2016 lawsuit
Commitments and contingencies
Future operating lease obligations		$ 34.5	$ 55.9
Commitments for capital expenditures		201.9	153.1
Future purchase commitments		$ 1,012.6	$ 935.0
Amount of damages claim	$ 1.6
Compania Minera Maricunga | Other regulatory matters
Commitments and contingencies
Number of lawsuits | lawsuit				2

X

- Definition

The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
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+ Details

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- Definition

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

+ References

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- Definition

The amount of future operating lease expenditures that the entity is committed to make.

+ References

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X

- Definition

The amount of future purchase commitments the entity is committed to make.

+ References

No definition available.

+ Details

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

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- Definition

Represents the number of lawsuits.

+ References

No definition available.

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- Details

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