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INCOME TAXES: (Tables) | 3 Months Ended
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Mar. 31, 2025
INCOME TAXES: |
Schedule of income tax provision and effective income tax rate | The income tax provision and the effective income tax rate for the three-month period ended March 31, 2025 and 2024 consisted of (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024 | ​
Statutory income tax provision | ​ | $ | 445.3 | ​ | $ | 363.1 | ​
Peruvian royalty | ​ |  | 15.1 | ​ |  | 9.9 | ​
Mexican royalty | ​ |  | 47.4 | ​ |  | 30.6 | ​
Peruvian special mining tax | ​ |  | 25.0 | ​ |  | 19.8 | ​
Total income tax provision | ​ | $ | 532.8 | ​ | $ | 423.4 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Effective income tax rate | ​ | ​ | 36.0 | % | ​ | 36.6 | %

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- Definition Disclosure of the income tax provision attributable to continuing operations and the effective income tax rate. + References No definition available. + Details
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- References No definition available. + Details
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