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INCOME TAXES: (Tables)

3 Months Ended

Mar. 31, 2021

INCOME TAXES:

Schedule of income tax provision and effective income tax rate

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The income tax provision and the effective income tax rate for the first three months of 2021 and 2020 consisted of (in millions):

​	​	​	​	​	​	​	​
​		2021			2020		​
Statutory income tax provision	​	$	427.3	​	$	207.4	​
Peruvian royalty	​		11.6	​		2.0	​
Mexican royalty	​		47.4	​		8.1	​
Peruvian special mining tax	​		21.2	​		4.2	​
Total income tax provision	​	$	507.5	​	$	221.7	​
​	​	​	​	​	​	​	​
Effective income tax rate	​	​	40.1	%	​	50.8	%

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- Definition

Disclosure of the income tax provision attributable to continuing operations and the effective income tax rate.

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