v3.26.1
LEASES: (Tables)
6 Months Ended
Jun. 30, 2026
LEASES:  
Schedule of the operating lease expense recognized

The operating lease expense recognized in the six-month periods ended June 30, 2026 and 2025 was classified as follows (in millions):

Classification

  ​ ​ ​

2026

 

2025

Cost of sales (exclusive of depreciation, amortization and depletion)

 

$

57.4

$

57.6

Selling, general and administrative

 

0.1

 

(*)

Exploration

 

(*)

 

0.1

Total lease expense

 

$

57.5

$

57.7

Schedule of Maturities of lease liabilities

Lease liabilities

Year

  ​ ​ ​

(in millions)

2026

 

$

58.6

2027

 

117.2

2028

 

117.2

2029

 

115.6

2030

 

108.0

After 2030

 

216.0

Total lease payments

 

$

732.5

Less: interest on lease liabilities

 

(102.4)

Present value of lease payments

 

$

630.1